jetsealpars - جت سیل پارس

Hydraulic Seals

description

O-Ring activated symmetric PTFE rod seal, low friction. for extreme low or high speed, suitable for positioning functions.

asymmetric double-acting composite rod seals, with a gliding part made of low friction material and an elastic preload element.
interference fit on the outside diameter.
various materials are available for different purposes.
snaps into simple grooves (see notes on installation).
the generously dimensioned chamfer reduces the risk of gap extrusion.
good sealing effect across a wide temperature range.
for pressures up to 400 bar (in special cases up to 800 bar) as a seal betweenpressurised spaces.
good sealing in all pressure ranges.
good static and dynamic sealing.
suitable for short and long travel with extremely slow or quick movements.
no stick-slip.
small break-awayload after prolonged periods of standstill.
exact positioning due to little friction.
high mechanical efficiency.
insensitive to thermal damage caused by air in the oil.
radial grooves assure a fast pressure activation of the seal (design and arrange-ment see “fabrication tolerances for machined seals” es 222.209-d).
this seal can run over holes which are smaller than nominal seal height if theholes have suitable chamfered edges.

application

not bolded symbols; please consult our technical for application limitations

category of profile

machined or molded/standard/trade product.

double acting

the RS09-A seal is designed for use as a piston seal.

area of application: hydraulics

reciprocating rods on hydraulic cylinders,small swivelling motion permissible.
main field application is pressure intensifiers and control elements.
dimensions according to ISO 7425 part 2 are common, as well as standard types that differ slightly in the depth of the mounting

space. for specific dimensions see “range of profile sizes”.

note

there should be enough space for trailing oil.
the recovery capacity depends on the sealing system.
because of the fluid transport between the pressurized spaces this seal is only suitable to seal same media.

function

RS09 profiles are composite rod seals designed to seal between two pressurised spaces; mainly for reciprocating movements. the design

is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the seal-

ing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geom-

etry in the software program.

for detailed information regarding chemical resistance please refer to our “list of resistance”. for decreased leakage rates elastomer materials (polyure-

thane or rubber) in other sealing systems are to be preferred.

note on special materials:

as temperature limit and chemical resistance are determined by the preload element, the temperature range can be increased and the resis-

tance to chemical influences improved, if a special material is used for the preload element.

gap dimension

operating pressure	cs = (ØD - Ød)/2 mm
	2.45	3.65	5.35	7.55	10.25	12	13.65
	safe extrusion gap (mm)
100 bar (10 MPa)	0.27	0.33	0.38	0.43	0..50	0.55	0.60
200 bar (20 MPa)	0.19	0.25	0.28	0.33	0.37	0.43	0.45
300 bar (30 MPa)	0.17	0.20	0.22	0.25	0.30	0.34	0.38
400 bar (40 MPa)	0.16	0.18	0.19	0.21	0.25	0.28	0.30

important note:

the above data are maximum values and cannot be used at the same time. e.g. the maximum operating speed depends on material type, pressure, temperature and gap value. temperature range also dependent on medium”

the table refers to a operating temperature of 80°C. temperatures below may increase the safe extrusion gap slightly, at temperatures above

80 °C, the gap dimensions has to be reduced or a stronger profile selected.

for extrusion gap sizes resulting from tolerance pair H8/f8 pressure ranges above 400 bar can be reached in special cases, influences due to

thermal expansion have to be considered. we recommend to contact our technical department.

surface quality

surface roughness	Rtmax (μm)	Ra (μm)
sliding surface	≤2,5	≤0,1-0,5
bottom of groove	≤6,3	≤1,6
groove face	≤15	≤3

tolerance recommendation

seal housing	tolerances
Ød	f8
ØD	H10

mode of installation

for inside diameters of 25 mm or more, and dependant on radial cross section (cs), seals may be snapped into a closed housing.

Ød	type of installation
≤ 6•cs	open mounting space required
> 6•cs .....≤ 10•cs	snap mounting with tool
> 10•cs	snap mounting by hand

recommended guide tolerance D1:

in most cases the guiding elements are integrated in the piston seal system on both sides. if not use below recommendations for D1 (=inside diameter of the guiding elements):

d f8 [mm]	p ≤ 100 [bar]	100 < p ≤ 200 [bar]	p > 200 [bar]
≤ 100	H10	H8	H8
> 100 ≤ 200	H10	H8	H7
>200	>20	H8	H7

insertion chamfer:

in order to avoid damage to the rod seal during installation, the piston rod is to be chamfered and rounded as shown in the “recommended mounting space” drawing. the size of chamfer depends on the seal type and profile width.

cs (mm)	c (mm)
cs (mm)	α = 15⁰ ... 20⁰	α = 20⁰ ... 30⁰
2.45	2.5	1.5
3.5	3.5	2
5.35	4.5	3
7.55	5	3.5
10.25	6	5
12	8	6
13.65	10	7

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

the ratio between nominal width and seal height should be in accordance to ISO 7425 part 1. we recommend the following values:

Ød [mm]	ØD [mm]	L [mm]	cs = (ØD - Ød)/2 [mm]
5 ~ 7,9	Ød + 4,9	2.2	2,45
8 ~ 18,9	Ød + 4,9	3.2	3,65
19 ~ 37,9	Ød + 10,7	4.2	5,35
38 ~ 199,9	Ød + 15,1	6.3	7,55
200 ~ 255,9	Ød + 20,5	8.1	10,25
256 ~ 649,9	Ød + 24	8.1	12
650 ~ 1.000	Ød + 27,3	9.5	13.65
> 1.000	Ød + 27,3	9.5	13.65

in case of large deviations of L use RS 09-A.

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

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description

O-Ring activated asymmetric PTFE rod seal, low friction. in tandem design together with double acting wipers for extreme low or high speed or positioning functions. as primary seal in combination with secondary RS01 seal with good resistance to pres- sure shocks used in mobile hydraulics, machine tools, injection moulding machines, heavy hydraulics.

asymmetric single-acting composite rod seals, with a gliding part made of low friction material and an elastic preload element.
interference fit on the outside diameter.
various materials are available for different purposes.
mostly used in a sealing system, either in tandem arrangement with double wip-er
snaps into simple grooves (see notes on installation).
the free space on the trailing side reduces the risk of gap extrusion.
highest degree of sealing across a wide temperature range.
sealing effect enhanced by high recovery.
for pressures up to 400 bar (in special cases up to 800 bar) as a seal between pres-surised space and atmosphere.
good sealing in all pressure ranges.
good static and dynamic sealing.
suitable for short and long travel with extremely slow or quick movements.
no stick-slip.
small break-awayload after prolonged periods of standstill.
exact positioning due to little friction.
high mechanical efficiency.
insensitive to thermal damage caused by air in the oil.

application

category of profile

machined or molded/standard/trade product.

single acting

the RS 09-B seal is designed for use as a rod seal.

area of application: hydraulics

reciprocating rods on hydraulic cylinders,small swiveling motion permissible.
as rod seal in tandem arrangement for positioning tasks for machine tools and robots.
as rod seal in combination with lip seals as secondary seal for rough operations (e.g.construction machines, heavy machinery).
for heavy-dutyoperating conditions, profile RS 09-B is preferred.
dimensions according to ISO 7425 part 2 are common, as well as standard types that differ slightly in the depth of the mounting

space. for specific dimensions see “range of profile sizes”.

note

the calculation program is based on mounting spaces according to ISO 7425, part 2. intermediate sizes are possible, with an O-ring for standard sizes. for deviating dimensions, use RS 09-B. attention must be given to a balanced ratio between sealing part and preload element.
there should be enough space for trailing oil.
the recovery capacity depends on the sealing system.

function

RS 09-B profiles are composite rod seals designed to seal pressurised space against the atmosphere; mainly for reciprocating movements.

the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined

in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the

geometry in the software program.

operating parameters & material

sealing element	energizer	temperature	max-surface speed	max-pressure	hydrolysis	dry running	wear resistance
PTFE glas	NBR (70 shore A)	-30 °C ... +100 °C	10 m/s	400 bar (40 MPa) 800 bar (80 MPa)3	-	++	+
PTFE bronze	NBR (70 shore A)	-30 °C ... +100 °C	10 m/s		-	++	+
PTFE carbon	NBR (70 shore A)	-30 °C ... +100 °C	10 m/s		-	++	+
PTFE glass	NBR (75 shore A)	-20 °C ... +200 °C	10 m/s		-	++	+
PTFE bronze	NBR (75 shore A)	-20 °C ... +200 °C	10 m/s		-	++	+
PTFE carbon	NBR (75 shore A)	-20 °C ... +200 °C	10 m/s		-	++	+
PTFE glass	EPDM (70 shore A)	-50 °C ... +150 °C	10 m/s		++	++	+
PTFE bronze	EPDM (70 shore A)	-50 °C ... +150 °C	10 m/s		++	++	+
PTFE carbon	EPDM (70 shore A)	-50 °C ... +150 °C	10 m/s		++	++	+
PTFE glass	MVQ (70 shore A)	-60 °C ... +200 °C	10 m/s		++	++	+
PTFE bronze	MVQ (70 shore A)	-60 °C ... +200 °C	10 m/s		++	++	+
PTFE carbon	MVQ (70 shore A)	-60 °C ... +200 °C	10 m/s		++	++	+
UHMWPE	MVQ (70 shore A)	-60 °C ... +80 °C	10 m/s	400 bar (40 MPa)	++	++	+
HPU D57	NBR (70 shore A)	-30 °C ... +110 °C	5 m/s	600 bar (40 MPa)	++	+	+

the stated operation conditions represent general indications. it is recommended not to use all maximum values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

2 attention: not suitable for mineral oils!

3 only in special cases (small extrusion gap, low surface speed).

++ ... particularly suitable o ... conditional suitable

+ ... suitable - ... not suitable

for detailed information regarding chemical resistance please refer to our “list of resistance”. for decreased leackage rates elastomer materials (polyure-

thane or rubber) in other sealing systems are to be preferred.

note on special materials:

as temperature limit and chemical resistance are determined by the preload element, the temperature range can be increased and the resis-

tance to chemical influences improved, if a special material is used for the preload element.

gap dimension

operating pressure	cs = (ØD - Ød)/2 mm
	2.45	3.65	5.35	7.55	10.25	12	13.65
	safe extrusion gap (mm)
100 bar (10 MPa)	0.27	0.33	0.38	0.43	0.50	0.55	0.60
200 bar (20 MPa)	0.19	0.16	0.25	0.28	0.33	0.37	0.45
300 bar (30 MPa)	0.17	0.20	0.22	0.25	0.30	0.34	0.38
400 bar (40 MPa)	0.16	0.18	0.19	0.21	0.25	0.28	0.30

important note:

the table refers to a operating temperature of 80°C. temperatures below may increase the safe extrusion gap slightly, at temperatures above

80 °C, the gap dimensions has to be reduced or a stronger profile selected.

for extrusion gap sizes resulting from tolerance pair H8/f8 pressure ranges above 400 bar can be reached in special cases, influences due to

thermal expansion have to be considered. we recommend to contact our technical department.

surface quality

surface roughness	Rtmax (μm)	Ra (μm)
sliding surface	≤2,5	≤0,1-0,5
bottom of groove	≤6,3	≤1,6
groove face	≤15	≤3

tolerance recommendation

seal housing	tolerances
Ød	f8
ØD	H10

mode of installation

for inside diameters of 25 mm or more, and dependant on radial cross section (cs), seals may be snapped into a closed housing.

Ød	type of installation
≤ 6•cs	open mounting space required
> 6•cs .....≤ 10•cs	snap mounting with tool
> 10•cs	snap mounting by hand

recommended mounting space:

two types of mounting space are recommended depending on application:

secondary seal

wiper

version 1

RS 09-B

RS 09-A

WR 11

WR 12

WR 13

WR14

WR15

version 2

RS01 (all U-ring Type)

all type possible

the choice of the sealing system does not depend on the guide elements.

recommended guide tolerance D1:

in most cases the guiding elements are integrated in the piston seal system on both sides. if not use below recommendations for D1 (=inside diameter of the guiding elements):

d f8 [mm]	p ≤ 100 [bar]	100 < p ≤ 200 [bar]	p > 200 [bar]
≤ 100	H10	H8	H8
> 100 ≤ 200	H10	H8	H7
>200	H9	H8	H7

insertion chamfer:

cs (mm)	c (mm)
cs (mm)	α = 15⁰ ... 20⁰	α = 20⁰ ... 30⁰
2.45	2.5	1.5
3.5	3.5	2
5.35	4.5	3
7.55	5	3.5
10.25	6	5
12	8	6
13.65	10	7

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

the ratio between nominal width and seal height should be in accordance to ISO 7425 part 1. we recommend the following values:

Ød [mm]	ØD [mm]	L [mm]	cs = (ØD - Ød)/2 [mm]
5 ~ 7,9	Ød + 4,9	2.2	2.45
8 ~ 18,9	Ød + 7,3	3.2	3.65
19 ~ 37,9	Ød + 10,7	4.2	5.35
38 ~ 199,9	Ød + 15,1	6.3	7.55
200 ~ 255,9	Ød + 20,5	8.1	10.25
256 ~ 649,9	Ød + 24	8.1	12
650 ~ 1.000	Ød + 27,3	9.5	13.65
> 1.000	Ød + 27,3	9.5	13.65

in case of large deviations of L use RS 09-B.

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

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description

O-Ring activated asymmetric PU rod seal with excellent dynamic sealing capacity. used secondary seal in tandem design (together with primary RS 09-C) to minimize residual oil film. for mobile hydraulics, injection moulding machines, heavy hydraulics.

asymmetric single acting composite rod seals, with a gliding part made of excel- lent wear resistant polyurethane and an elastic preload element.
interference fit on the outside diameter.
various materials are available for different purposes.
mostly used in a sealing system as secondary seal in combination with a PTFEgliding part composite seal RS 09-C (same housing) to minimize the resident oilfilm, a double wiper is not needed.
for secondary sealing systems this seal can take sole sealing function.
snaps into simple grooves (see notes on installation).
the free space on the trailing side reduces the risk of gap extrusion.
highest degree of sealing across a wide temperature range.
sealing effect enhanced by high recovery.
for pressures up to 250 bar as a seal between pressurised space and atmosphere.
excellent sealing in all pressure ranges.
good static and dynamic sealing.
suitable for short and long travel with extremely slow or quick movements.
no stick-slip.
small break-away load after prolonged periods of standstill.

application

category of profile

machined only.

single acting

the RS09-C seal is designed for use as a rod seal.

area of application: hydraulics

reciprocating rods on hydraulic cylinders,small swivelling motion permissible.
as secondary rod seal in tandem arrangement for positioning tasks for machine tools and robots.
dimensions according to ISO 7425 part 2 are common, as well as standard types that differ slightly in the depth of the mountingspace. for specific dimensions see “range of profile sizes”.
in secondary sealing systems as single seal can take sole sealing function.

note

the calculation program is based on mounting spaces according to ISO 7425, part 2. intermediate sizes are possible, with an O-ring for standard sizes. for deviating dimensions choose a different profile.
for tandem arrangement,there should be enough space for trailing oil, between the seals.
there should be enough space for trailing oil.
the recovery capacity depends on the sealing system.

function

RS09-C profiles are composite rod seals designed to seal pressurised space against the atmosphere; mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

Rod Seal S09-C

operating parameters & material

sealing element	energizer	temperature	max-surface speed	max-pressure	hydrolysis	dry running	wear resistance
PU	NBR (70 shore A)	-30 °C ... +100 °C	1 m/s	250 bar (25 MPa)	-	+	++
HPU	NBR (70 shore A)	-20 °C ... +100 °C	1 m/s	250 bar (25 MPa)	-	+	++
LTPU	NBR (70 shore A)	-30 °C ... +100 °C	1 m/s	250 bar (25 MPa)	-	+	++
SPU	NBR (70 shore A)	-20 °C ... +200 °C	1.4 m/s	250 bar (25 MPa)	-	++	++
CPU	NBR (70 shore A)	-30 °C ... +200 °C	1 m/s	250 bar (25 MPa)	-	+	++

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable o ... conditional suitable

+ ... suitable - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, attention should be paid to restrictions for pressure range and wear resistance. for higher gliding speeds another system should be used (e.g. PTFE materials).

note on special materials:

as temperature limit and chemical resistance are determined by the preload element, the temperature range can be increased and the resis-

tance to chemical influences improved, if a special material is used for the preload element.

gap dimension

operating pressure	cs = (ØD - Ød)/2 mm
	2.45	3.65	5.35	7.55	10.25	12
	safe extrusion gap (mm)
5	0.30	0.35	0.45	0.55	0.66	0.70
10	0.25	0.30	0.35	0.35	0.45	0.55
15	0.20	0.25	0.25	0.30	0.35	0.40
20	0.15	0.20	0.20	.025	0.30	0.35
25	0.10	0.15	0.15	0.20	0.25	0.30

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem-

perature and gap value. temperature range also dependent on medium. the diagram applies to an operating temperature of 70 °C.

surface quality

surface roughness	Rtmax (μm)	Ra (μm)
sliding surface	≤2,5	≤0,1-0,5
bottom of groove	≤6,3	≤1,6
groove face	≤15	≤3

tolerance recommendation

seal housing	tolerances
Ød	f8
ØD	H10

recommended housing for S09-P

L	(ØD - Ød)/2 mm
L	ISO	standard
2.2	2.45	2.5
3.2	3.65	3.75
4.2	5.35	5.5
6.3	7.55	7.75
8.1	10.25	10.5
8.1	12	12.25

mode of installation

for inside diameters of 25 mm or more, and dependant on the radial cross section (cs), seal can be snapped into the housing.

Ød	type of installation
≤ 6•cs	open mounting space required
> 6•cs .....≤ 10•cs	snap mounting with tool
> 10•cs	snap mounting by hand

recommended mounting space:

two types of mounting space are recommended depending on application:

	secondary seal	secondary seal
version 1	S09-E	S09-P
version 2	S09-P	-

the choice of the sealing system does not depend on the guide elements.

recommended guide tolerance D1:

in most cases the guiding elements are integrated in the piston seal system on both sides. if not use below recommendations for D1 (=inside diameter of the guiding elements):

d f8 [mm]	p ≤ 100 [bar]	100 < p ≤ 200 [bar]	p > 200 [bar]
≤ 100	H10	H8	H8
> 100 ≤ 200	H10	H8	H7
>200	>20	H8	H7

insertion chamfer:

cs (mm)	c (mm)
cs (mm)	α = 15⁰ ... 20⁰	α = 20⁰ ... 30⁰
2.45	2.5	1.5
3.5	3.5	2
5.35	4.5	3
7.55	5	3.5
10.25	6	5
12	8	6
13.65	10	7

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

the ratio between nominal width and seal height should be in accordance to ISO 7425 part 2. we recommend the following values:

Ød [mm]	cs = (ØD - Ød)/2 [mm]	L [mm]
5 ~ 7,9	2,45	2,2
8 ~ 18,9	3,65	3,2
19 ~ 37,9	5,35	4,2
38 ~ 199,9	7,55	6,3
200 ~ 255,9	10,25	8,1
256 ~ 649,9	12	8,1

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

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Description

the rod seal RS09-D is an rubber energised plastic faced seal. the seal is designed to expand and improve the service parameters of O-Rings and is installed in existing O-Ring grooves.

RS 09-D combines the flexibility and response of O-Rings with the wear and friction characteristics of the PTFE+.... materials in dynamic applications.

the figures below shows the cross section of the RS09-D.

the double acting performance of the seal follows from the symmetrical cross section which allow the seal to respond to pressure in both directions.

initial contact pressure is provided by radial compression of the O-Ring. when the system pressure is increased the O-Ring transforms this into additional contact pres- sure, the contact pressure of the seal is thereby automatically adjusted so sealing is ensured under all service conditions.

application

category of profile

machined or molded/standard/trade product.

double acting

the RS 09-D seal is designed for use as a rod seal.

area of application: hydraulics

the RS09 D is preferably used as a double acting seal for hydraulic and pneumatic equipment in sectors such as:

machine tools
handling devices
manipulators
valves
chemical process equipments.

it is particular recommended for light duty and small diameter applications.

notches

RS09-D is as standard supplied without radial notches, as the thin radial section of the seal gives good response to pressure variations. for diameters from 8 mm notches on both sides are optional. these ensure direct pressurizing of the seal under all operating conditions.

advantages

compact groove dimensions and simple installation.
low friction without stick-slip.
resistance against wear and extrusion.
rod seals available for all diameters from 2 to 999.9 mm.
standard cross sections cover AS 568A and important metric O-Rings, other cross sections available on request.
fits also groove dimensions per MIL-G-5514F.

operating parameters & material for standard application:

material		temperature	max-surface speed	max-pressure
sealing element	energizer	temperature	max-surface speed	max-pressure
PTFE bronze	NBR	-30˚C … + 100˚C	15 m/s	350 bar (350 MPa)
	TNBR	-45˚C … + 80˚C	15 m/s	350 bar (350 MPa)
	FKM	-10˚C … + 200˚C	15 m/s	350 bar (350 MPa)

for hydraulic components with reciprocating movement in mineral oils containing zinc or medium with good lubricating performance and hard mating surface.

standard material for hydraulics, high compressive strength, good sliding and wear properties, good extrusion resistance, BAM tested. mating surface material: steel tubes, steel hardened cast iron.

colour: greyish to dark brown.

short stroke movements, poor lubricating fluids and soft mating surfaces. for all lubricating and non-lubricating hydraulic fluids, soft mating surfaces.

mating surface material: steel, steel hardened cast iron, stainless steel, aluminium, bronze. colour: black

important note:

1 pressure ratings are dependent on the size of the extrusion gap.

2 attention: not suitable for mineral oils!

installation dimensions

rod diameter - d (f8/h9)		D (H9)	L + 0,2	r	max. permissible gap dimension - s 1				O-Ring cross section
standard application	light application	D (H9)	L + 0,2	r	2 MPa	10 MPa	20 MPa	35 MPa	O-Ring cross section
4 ~9,9	2 ~129,9	d + 2,9	2,4	0.4	0.10	0.10	0.08	0.05	1.78
10 ~19,9	5 ~249,9	d + 4,5	3.6	0.4	0.15	0.15	0.10	0.07	2.62
20 ~39,9	5 ~449,9	d + 6,2	4.8	0.6	0.25	0.20	0.15	0.08	3.53
40 ~119,9	12 ~649,9	d + 9,4	7.1	0.8	0.35	0.25	0.20	0.10	5.33
120 ~649,9	60 ~ 999,9	d + 12,2	9.5	0.8	0.50	0.30	0.25	0.15	7.00
650 ~999,9	110 ~999,9	d + 15,0	10.0	1.0	0.60	0.40	0.30	0.20	8.40

important note:

1 at pressures > 40 MPa use diameter tolerance H8/f8 (bore/piston) in area of the seal. the radial clearance is valid for material PTFE + Bronze at

+60°C.

surface quality

surface roughness	material	Rtmax [µm]	Rz DIN [µm]	Ra [µm]
mating surface	PTFE + ……	0.63 - 2.50	0.40 - 1.60	0.05 - 0.20
mating surface	PU & Rubber	1.00 - 4.00	0.63 - 2.50	0.10 - 0.40
groove surface		< 16	< 10.0	< 1.6

tolerance recommendation

seal housing	tolerances
Ød	f8/h9
ØD	H9

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

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description

rod seal RS09-FI consisting of profile ring and O-ring as a preload component

application

category of profile

machined or molded/standard/trade product.

double acting

the RS09-FI seal is designed for use as a piston seal.

area of application: hydraulics advantages

rod seal for lower pressure range with properties of :

low friction
low housing height

operating parameters & material

material		temperature	max-surface speed	max-pressure
sealing element	energizer
PTFE bronze	NBR (70 shore A)	-30 °C ... +100 °C	2 m/s	160 bar (16 MPa)

1 pressure ratings are dependent on the size of the extrusion gap.

surface quality

surface roughness	Rtmax (μm)	Ra (μm)
sliding surface	≤2	≤0,05-0,3
bottom of groove	≤6,3	≤1,6
groove face	≤15	≤3

tolerance recommendation

seal housing	tolerances
Ød	f8
ØD	H10

gap dimension

the decisive factor for the function of the seal is the largest gap dimension occurring during operation on the non-pressurised side of the seal.

we recommend a metal guide H8/f7.

fitting & installation

careful fitting is a prerequisite for the correct function of the seal.

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see JET SEAL PARS catalog...

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

Add new comment

description

chevron sealing set, machined surface design. for heavy industry hydraulics.

symmetric single-acting rod sealing set consisting of several chevrons, combined with pressure and support ring to form a set.
various materials are available for different purposes.
good sealing in all pressure ranges,particularly in the low pressure range.
for pressures up to 500 bar as a seal between pressurized space and atmosphere.
excellent static and dynamic sealing.
suitable for short and long travel.
very sturdy and wear-resistant.
insensitive to thermal damage caused by air in the oil.
open, preferably adjustable,mounting space required (see mode of installation).
the sealing packing can be used both as a rod seal and single-acting piston seal.
by combining various materials,the packing can be adjusted to the operatingconditions.
by varying the number of packings,friction as well as leakage behavior can beinfluenced.
for easier installation, seals can be split (see mode of installation).
mainly used for repair purposes. use more modern systems for new designs.

application

not bolded symbols; please consult our technical for application limitations

category of profile

machined only.

single acting

the RS10-12 seal is designed for use as a rod seal.

area of application: hydraulics

reciprocating rods on hydraulic cylinders; small swiveling motion also permissible.
especially for heavy hydraulic applications or heavy-dutyoperating conditions.
for repairs of heavy machinery and for normal wear,when re-tightening is possible.

note

expensive and complex design.
high degree of friction and thus little mechanical efficiency.
for small numbers.for large amounts, the RS10-12 profile is preferred.
too many chevrons or too high clamping torque at installation can load to increased friction and wear (for standing applications usemaximum 3-4 chevrons).
if a split version is used,the packings must be made slightly larger (approx. 1% in the diameter). the packing as well as the pressureand male ring are cut straight. at least 3 packings should be provided, preferably 5.

function

RS10-12 profiles are single-acting rod chevron sets designed to seal pressurized space against the atmosphere; mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

operating parameters & material

material			temperature	max. surface speed	max. pressure 1	hydrolysis	dry running	wear resistance
header ring RS10-A	sealing element RS11-A	back-up ring RS12-M	temperature	max. surface speed	max. pressure 1	hydrolysis	dry running	wear resistance
POM / PA2	PU	POM / PA2	-30 °C ... +100 °C	0,5 m/s	500 bar (50 MPa)	-	+	+
POM / PA2	HPU	POM / PA2	-20 °C ... +100 °C	0,5 m/s	500 bar (50 MPa)	+	+	+
POM / PA2	LTPU	POM / PA2	-40 °C ... +100 °C	0,5 m/s	500 bar (50 MPa)	-	+	+
POM / PA2	SPU	POM / PA2	-20 °C ... +100 °C	0,7 m/s	500 bar (50 MPa)	+	+	+
POM / PA2	CPU	POM / PA2	-30 °C ... +100 °C	0,5 m/s	500 bar (50 MPa)	+	+	+
PTFE glass	NBR	PTFE glass	-30 °C ... +100 °C	0,5 m/s	500 bar (50 MPa)	-	-	O
PTFE glass	FKM	PTFE glass	-20 °C ... +200 °C	0,5 m/s	500 bar (50 MPa)	-	-	O
PTFE glass	EPDM	PTFE glass	-50 °C ... +150 °C	0,5 m/s	500 bar (50 MPa)	++	-	O
PTFE glass	HNBR	PTFE glass	-25 °C ... +150 °C	0,5 m/s	500 bar (50 MPa)	+	O	+

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm.

++ ... particularly suitable o ... conditional suitable

+ ... suitable - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, polyurethane materials increase wear resistance. for higher gliding speeds another sealing system should be used (e.g. PTFE materials).

gap dimension

when using a pressure ring, the extrusion gap is already integrated in the seal. the gap between piston rod and housing should not exceed cs·0.05.

manufacturing notes

the following nominal widths are preferred. the theoretical packing height SH11 should be designed in accordance with the recommended values;

CS	SH11
(4)	2.2
5	2.5
(6)	3.0
7.5	3.5
10	5.0
12.5	6.0
15	7.5
20	10
(25)	12.5
(30)	15

in order to be able to maintain the required height irrespective of the accumulated packing height ‘h’, the pressure ring is individually adjusted during the production of the V-packing set. to do so, a control dimension is provided by the machine software with a view to assisting this process.

surface quality

surface roughness	Rtmax (μm)	Ra (μm)
sliding surface	≤2,5	≤0,1-0,5
bottom of groove	≤6,3	≤1,6
groove face	≤15	≤3

tolerance recommendation

seal housing	tolerances
Ød	f8
ØD	H10

mode of installation

insert the male ring first, then the packing and finally the pressure ring (well greased) into the installation space. insert the metal insert without load, complete mounting of the system, tighten metal inserts slightly, let run in (10 to 20 idle strokes); re-tighten depending on leakage. in the case of wear, re-tightening is also possible.

if split seals are used, the packing should be fitted by separating the split ends axially (twisting). joints should be staggered by 90 to 120 degrees relative to each other. split ends should be inserted into the groove first and then the remainder of the seal is pressed in.

recommended mounting space:

the adjustment range of the mounting space height (L) should correspond to approx. 10% of the theoretical mounting length. a guideline for the height of the spacer should be approx. 30% of the cross section.

recommended guide tolerance D1:

d f8 [mm]	p ≤ 100 [bar]	100 < p ≤ 200 [bar]	p > 200 [bar]
≤ 100	H10	H8	H8
> 100 ≤ 200	H10	H8	H7
>200	H9	H8	H7

insertion chamfer:

cs (mm)	c (mm)
cs (mm)	α = 15⁰ ... 20⁰	α = 20⁰ ... 30⁰
4	3.5	2
5	4	2.5
6	4.5	3
7.5	5	4
10	6	5
12.5	8.5	6.5
15	10	7.5
20	13	10

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

the ratio between nominal width and seal height should be in accordance with following recommendations (see also manufacturing notes)

Ød [mm]	ØD [mm]	L [mm]	cs = (ØD - Ød)/2 [mm]
10 - 39,9	ød + 10	16	5
40 - 74,9	ød + 15	25	7.5
75 - 149,9	ød + 20	32	10
150 - 199,9	ød + 25	40	12.5
200 - 300	ød + 30	50	15
> 300	ød + 40	63	20

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

Add new comment

description

chevron sealing set, machined surface design. for heavy industry hydraulics.

symmetric single-acting rod sealing set consisting of several chevrons, combined with pressure and support ring to form a set.
various materials are available for different purposes.
good sealing in all pressure ranges,particularly in the low pressure range.
for pressures up to 500 bar as a seal between pressurized space and atmosphere.
excellent static and dynamic sealing.
suitable for short and long travel.
very sturdy and wear-resistant.
insensitive to thermal damage caused by air in the oil.
open, preferably adjustable,mounting space required (see mode of installation).
the sealing packing can be used both as a rod seal and single-acting piston seal.
by combining various materials,the packing can be adjusted to the operatingconditions.
by varying the number of packings,friction as well as leakage behavior can beinfluenced.
for easier installation, seals can be split (see mode of installation).
mainly used for repair purposes. use more modern systems for new designs.

application

not bolded symbols; please consult our technical for application limitations

category of profile

machined only.

single acting

the RS1012-A seal is designed for use as a rod seal.

area of application: hydraulics

reciprocating rods on hydraulic cylinders; small swiveling motion also permissible.
especially for heavy hydraulic applications or heavy-dutyoperating conditions.
for repairs of heavy machinery and for normal wear,when re-tightening is possible.

note

expensive and complex design.
high degree of friction and thus little mechanical efficiency.
for small numbers.for large amounts, the RS1012 profile is preferred.
too many chevrons or too high clamping torque at installation can load to increased friction and wear (for standing applications usemaximum 3-4 chevrons).
if a split version is used,the packings must be made slightly larger (approx. 1% in the diameter). the packing as well as the pressureand male ring are cut straight. at least 3 packings should be provided, preferably 5.

function

RS1012-A profiles are single-acting rod chevron sets designed to seal pressurized space against the atmosphere; mainly for reciprocating movements. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

operating parameters & material

material			temperature °C	max. surface speed	max. pressure 1	hydrolysis	dry running	wear resistance
header ring RS10-A	sealing RS11-A	back-up ring RS12-M	temperature °C	max. surface speed	max. pressure 1	hydrolysis	dry running	wear resistance
POM /PA	PU	POM /PA	-30 °C ... +100	0,5 m/s	500 bar (50 MPa)	-	+	+
POM /PA	HPU	POM /PA	-20 °C ... +100	0,5 m/s	500 bar (50 MPa)	+	+	+
POM /PA	LTPU	POM /PA	-40 °C ... +100	0,5 m/s	500 bar (50 MPa)	-	+	+
POM /PA	SPU	POM /PA	-20 °C ... +100	0,7 m/s	500 bar (50 MPa)	+	+	+
POM /PA	CPU	POM /PA	-30 °C ... +100	0,5 m/s	500 bar (50 MPa)	+	+	+
PTFE glass	NBR	PTFE glass	-30 °C ... +100	0,5 m/s	500 bar (50 MPa)	-	-	O
PTFE glass	FKM	PTFE glass	-20 °C ... +200	0,5 m/s	500 bar (50 MPa)	-	-	O
PTFE glass	EPDM	PTFE glass	-50 °C ... +150	0,5 m/s	500 bar (50 MPa)	++	-	O
PTFE glass	HNBR	PTFE glass	-25 °C ... +150	0,5 m/s	500 bar (50 MPa)	+	O	+

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm.

++ ... particularly suitable o ... conditional suitable

+ ... suitable - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials are to be preferred, polyurethane materials increase wear resistance. for higher gliding speeds another sealing system should be used (e.g. PTFE materials).

gap dimension

when using a pressure ring, the extrusion gap is already integrated in the seal. the gap between piston rod and housing should not exceed cs·0.05.

manufacturing notes

the following nominal widths are preferred. the theoretical packing height SH11 should be designed in accordance with the recommended values;

CS	SH11
(4)	2.2
5	2.5
(6)	3.0
7.5	3.5
10	5.0
12.5	6.0
15	7.5
20	10
(25)	12.5
(30)	15

surface quality

surface roughness	Rtmax (μm)	Ra (μm)
sliding surface	≤2,5	≤0,1-0,5
bottom of groove	≤6,3	≤1,6
groove face	≤15	≤3

tolerance recommendation

seal housing	tolerances
Ød	f8
ØD	H10

mode of installation

recommended mounting space:

recommended guide tolerance D1:

d f8 [mm]	p ≤ 100 [bar]	100 < p ≤ 200 [bar]	p > 200 [bar]
≤ 100	H10	H8	H8
> 100 ≤ 200	H10	H8	H7
>200	H9	H8	H7

insertion chamfer:

cs (mm)	c (mm)
cs (mm)	α = 15⁰ ... 20⁰	α = 20⁰ ... 30⁰
4	3.5	2
5	4	2.5
6	4.5	3
7.5	5	4
10	6	5
12.5	8.5	6.5
15	10	7.5
20	13	10

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

the ratio between nominal width and seal height should be in accordance with following recommendations (see also manufacturing notes)

Ød [mm]	ØD [mm]	L [mm]	cs = (ØD - Ød)/2 [mm]
10 - 39,9	ød + 10	16	5
40 - 74,9	ød + 15	25	7.5
75 - 149,9	ød + 20	32	10
150 - 199,9	ød + 25	40	12.5
200 - 300	ød + 30	50	15
> 300	ød + 40	63	20

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

Add new comment

description

finger spring activated, asymmetrical PTFE rod seal, low friction and good dry run- ning properties, excellent chemical and thermal resistance, mainly used in chemical, pharma and food industry.

asymmetric single-acting rod lip seal, with the dynamic sealing lip being dif- ferently shaped than the static one. the preload is created by a finger spring inserted in the groove.
interference fit on the outside diameter.
various materials are available for different purposes.
good sealing effect across a wide temperature range.
sealing effect enhanced by high recovery rate.
for pressures up to 200 bar as a seal between pressurised space and atmosphere(in certain cases also above that, see “gap dimensions”).
good sealing in all pressure ranges.
excellent static and dynamic sealing after short run-in time.
suitable for short and long travel.
no reverse leakage (i.e. minor relative motion of the sealing edges when thedirection is changed).
little friction in dry running or in media with poor lubricating effect (in aqueousmedia only suitable to a limited extent).
low break-awayload.
flexible sealing lip due to large spring travel.

application

not bolded symbols; please consult our technical for application limitations

category of profile

machined or molded/standard/trade product.

single acting

the RS 19 seal is designed for use as a rod seal.

area of application: hydraulics

reciprocating and swiveling rods on cylinders, push rods, fittings in the chemical industry.

note

special measures required when used at temperatures below -60°C, because of material shrinkage.
considering the limited long-time rupture strength of PTFE materials,the cs/H ratio should not fall below a value of 1/1.5.
cross-sections limited to 10 mm.
varying the angle of the chamfer on the dynamic sealing lip allows adaptation to media (steeper angle for high viscosity media)

respectively a pressure relief (flat angle).

function

RS19 profiles are lip seals designed to seal pressurised space against the atmosphere; mainly for reciprocating movements. the design is based on application in aggressive media or with high thermal demands. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

operating parameters & material

sealing element	spring	temperature	max. surface speed	max. pressure 1	hydrolysis	dry running	wear resistance
PTFE virgin	14.310	-200 °C ... +260 °C	15 m/s	100 bar (10 MPa)	++	++	+
PTFE glass	14.310	-200 °C ... +260 °C	15 m/s	160 bar (16 MPa)	++	++	+
PTFE bronze	14.310	-200 °C ... +260 °C	15 m/s	160 bar (16 MPa)	++	++	+
UHMWPE	14.310	-200 °C ... +80 °C	15 m/s	200 bar (20 MPa)	++	+	+

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable o ... conditional suitable

+ ... suitable - ... not suitable

for detailed information regarding chemical resistance please refer to our “list of resistance”. for decreased leackage rates elastomer materials (polyure-

thane or rubber) in other sealing systems are to be preferred.

gap dimension

operating pressure	cs = (ØD - Ød)/2 mm
	2	5	7.5	10
	safe extrusion gap (mm)
2	0.16	0.35	0.55	0.65
10	0.11	0.25	0.40	0.50
15	0.09	0.23	0.35	0.45
20	0.07	0.20	0.30	0.40

important note:

the above data are maximum value and can’t be used at the same time. e.g. the maximum operating speed depend on material type, pressure, tem- perature and gap value. temperature range also dependent on medium.

the table refers to a operating temperature of 80°C. temperatures below may increase the safe extrusion gap slightly, at temperatures above

80 °C, the gap dimensions has to be reduced or a stronger profile selected.

in exceptional cases, a pressure above the limit of 200 bar is possible, the safe extrusion gap is the result of the tolerance pair H8/f8, influences

due to thermal expansion have to be considered. we also recommend contacting our technical department.

surface quality

surface roughness	Rtmax (μm)	Ra (μm)
sliding surface	≤2	≤ 0,05-0,3
bottom of groove	≤10	≤1,6
groove face	≤10	≤ 1,6

tolerance recommendation

seal housing	tolerances
Ød	f8
ØD	H10

mode of installation

normally a open housing should be designed. the profile should not be snaped in, the spring may be damaged and a faultless function can not be ensured.

in special cases a snap-in installation is possible, therefore the housing has to be designed accordingly. the seal can only be held by a retaining housing step, having a width of 0.25·cs and a distinctive 30° chamfer, all edges must be rounded. the smallest possible diameter for such a snap- in installation is 10·cs.

recommended guide tolerance D1:

d f8 [mm]	p ≤ 100 [bar]	100 < p ≤ 200 [bar]	p > 200 [bar]
≤ 100	H10	H8	H8
> 100 ≤ 200	H10	H8	H7
>200	H9	H8	H7

insertion chamfer:

cs (mm)	c (mm)
cs (mm)	α = 15⁰ ... 20⁰	α = 20⁰ ... 30⁰
(2)	2	1
(3)	3	1.5
4	3.5	2
5	4	2.5
6	4.5	3
7.5	5	4
10	6	5

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

with PTFE materials, the profile size does not so much depend on the seal diameter but rather on pressure and extrusion gap. this relationship is described under “gap dimensions”. nominal widths not shown in the diagram can be interpolated if required.

the ratio between nominal width and seal height cs/H should not drop below 1/1.5. therefore we recommend the following housing heights.

cs = (ØD - Ød)/2 [mm]	L [mm]
2	3.5
3	5.1
4	6.5
5	8.8
6	10.2
7.5	12.8
17	10

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

Add new comment

description

optimized for high pressure, equal angled chevron design suitable for high pressure range. external spring pretension necessary. mainly used in chemical, pharma and food industry.

symmetric single-acting rod sealing set consisting of several chevrons, combined with pressure and support ring to form a set.
the sealing function originates from the contact force applied by a spring, wear is compensated (for required spring force see “mode of installation”).
various materials are available for different purposes.
good sealing in the lower pressure range.
for pressures up to 315 bar as a seal between pressurised space and atmosphere.
good static and dynamic sealing.
suitable for short and long travel.
wear resistance is depending on material combina
open mounting space required (see mode of installation).
the sealing packing can be used both as a rod seal and single-acting piston seal.
by varying the material, operation conditions can be adapted.
by varying the number of packings, friction as well as leakage behavior can beinfluenced.

application

not bolded symbols; please consult our technical for application limitations

category of profile

machined or molded/standard/trade product.

single acting

the RS 2931 seal is designed for use as a rod seal.

area of application: hydraulics

valves and pumps in corrosive environment.
chemical, pharma, and food industry.
high temperature applications up to 200°C.
slight pivoting or spiral movement allowable.

note

expensive and complex desig
the hardness of the sliding surface should reach a minimum of 25 to 65 HRC, otherwise a damage of the sliding surface is possible(attention: acid-resistant steels do not always reach such hardness).
if no “dead spot” is allowed in the sealing system (e.g.: food industry), the spring can be installed on the not pressurised side as well.

the spring tension then has to be increased by the value of the axial force, resulting from pressurisation (see “mode of installation”). in

this case the support ring has to be furnished with pressure relief grooves.

function

RS 2931 seal profiles are single-acting rod seal sets designed to seal pressurized space against the atmosphere; mainly for reciprocating move- ments. the design is based on application in aggressive media or with high thermal demands.

the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

operating parameters & material

material			temperature	max. surface speed	max. pressure 1	hydrolysis	dry running	wear resistance
header ring S29-F	sealing element S30-F	back-up ring S31-F
PTFE glass	PTFE virgin	PTFE glass	-200 °C ... +260 °C	0,5 m/s	315 bar (31.5 MPa)	++	++	O

the stated operation conditions represent general indications. it is recommended not to use all maximum values simultaneously. surface speed limits apply only to the presence of adequate lubrication film.

1 pressure ratings are dependent on the size of the extrusion gap.

++ ... particularly suitable o ... conditional suitable

+ ... suitable - ... not suitable

for detailed information regarding chemical resistance please refer to our “list of resistance”. for decreased leackage rates elastomer materials (polyure-

thane or rubber) in other sealing systems are to be preferred.

gap dimension

the size of the permissible gap on the side opposite the pressure source depends mainly on the seal material and the design of the seal. if the permissible gap dimensions are exceeded, there will be extrusion wear on the side opposite the pressure source which may make the seal unfit for usage. the maximum value of the permissible extrusion gap is reached when the piston or the piston rod touches one side of the cylindrical tube or guide. using this seal set free of defects should include extrusion gap sizes with the same tolerance range as the guiding.

surface quality

surface roughness	Rtmax (μm)	Ra (μm)
sliding surface	≤2,5	≤0,1-0,5
bottom of groove	≤6,3	≤1,6
groove face	≤15	≤3

tolerance recommendation

seal housing	tolerances
Ød	f8
ØD	H10

mode of installation

at first insert spring into housing. as far as possible, a metallic plate should be placed between spring and seal set in order to ensure a evenly dis- tributed contact pressure. pressure relief has to be provided. afterwards insert the male ring, then the packing and finally the pressure ring (well greased) into the installation space. insert the metal insert without load, complete mounting of the system, tighten metal inserts slightly, let run in (10 to 20 idle strokes). finally tighten the metal insert to nominal height.

recommended guide tolerance D1:

d f8 [mm]	p ≤ 100 [bar]	100 < p ≤ 200 [bar]	p > 200 [bar]
≤ 100	H10	H8	H8
> 100 ≤ 200	H10	H8	H7
>200	H9	H8	H7

insertion chamfer:

cs (mm)	c (mm)
cs (mm)	α = 15⁰ ... 20⁰	α = 20⁰ ... 30⁰
4	3.5	2
5	4	2.5
6	4.5	3
7.5	5	4
10	6	5
12.5	8.5	6.5
15	10	7.5
20	13	10

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

nominal width, mounting space height, cross section, diameter range and pressure should be in accordance with following recommendations:

the stated number of chevrons depends on the pressure range and is only valid for PTFE. filled PTFE series can allow lower numbers of chevron.

Ød [mm]	ØD [mm]	L [mm]	cs = (ØD - Ød)/2 [mm]
10 - 39,9	ød + 10	16	5
40 - 74,9	ød + 15	25	7.5
75 - 149,9	ød + 20	32	10
150 - 199,9	ød + 25	40	12.5
200 - 300	ød + 30	50	15
> 300	ød + 40	63	20

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

Add new comment

description

chevron set, design with extremely flexible sealing lips for difficult operating condi- tions (bad guiding, large tolerance range). available as total chevron set as well as intermediate chevrons only (in case of metal male and female adaptors).

asymmetric single-acting rod sealing set consisting of several chevrons, com- bined with pressure and support ring to form a set. pressure and support ring are mainly made of metal or already integrated in metal housing.
various materials are available for different purposes.
good sealing in the higher pressure range.
for pressures up to 500 bar as a seal between pressurised space and atmosphere.
good static and very good dynamic sealing.
suitable especially for very long travel.
low friction due to flexible lip design.
open, preferable adjustable mounting space required (see mode of installation).
by varying the number of packings,friction as well as leakage behavior can beinfluenced (at least 2 chevrons).
mainly used for repair purposes.use more modern systems for new designs.
the long,flexible lip can compensate guide clearance (e.g.: on long strokes).
due to the low contact pressure on the sealing lip surface,the piston can moveback easily.

application

not bolded symbols; please consult our technical for application limitations

category of profile

machined only.

single acting

the RS 32 seal is designed for use as a rod seal.

area of application: hydraulics

linearly acting rods on hydraulic cylinders; plunger in down and upstroke presses.
spindle seal at valves (at fittings).
cylinders with very long strokes,e.g. lifting ramps or hydraulic elevators.

note

expensive and complex design.
former designs mainly made in fabric reinforced rubber.replacing such fabric reinforced rubber seals by polyurethane seals will

reduce the lubricating film (attention in case of more sealing rings).

reworked housings (changed cross-section) require adapted pressure and support rings made of plastic. if this is not possible (if pres-

sure and support rings are integrated in the housing), it is recommended to consult our technical department for clarification.

Function

RS 32 profiles are single-acting rod seal sets designed to seal pressurized space against the atmosphere; mainly for reciprocating move- ments. the design is based on application in standard hydraulic systems with conventional hydraulic oils. the operating parameters are as defined in the sealing data sheet and material data. requirements deviating from these parameters can be met to a certain degree by changing the geometry in the software program.

operating parameters & material

material	back-up ring	temperature	max. surface speed	max. pressure 1	hydrolysis	dry running	wear resistance
PU	POM / PA	-30 °C ... +100 °C	0,5 m/s	500 bar (50 MPa)	-	+	+
HPU	POM / PA	-20 °C ... +100 °C	0,5 m/s	500 bar (50 MPa)	+	+	+
LTPU	POM / PA	-40 °C ... +100 °C	0,5 m/s	500 bar (50 MPa)	-	+	+
SLPU	POM / PA	-20 °C ... +100 °C	0,7 m/s	500 bar (50 MPa)	+	+	+
CPU	POM / PA	-30 °C ... +100 °C	0,5 m/s	500 bar (50 MPa)	+	+	+

1 pressure ratings are dependent on the size of the extrusion gap.

2 POM up to ø260 mm, PA above ø260 mm

++ ... particularly suitable o ... conditional suitable

+ ... suitable - ... not suitable

for detailed information regarding chemical resistance please refer to our „list of resistance“. for increased chemical and thermal resistance rubber

materials in other systems are to be preferred, attention should be paid to restrictions for pressure range and wear resistance. for higher gliding speeds another system should be used (e.g. PTFE materials).

gap dimension

when using a pressure ring, the extrusion gap is already integrated in the seal. the gap between piston rod and housing should not exceed cs·0.05.

surface quality

surface roughness	Rtmax (μm)	Ra (μm)
sliding surface	≤2,5	≤0,1-0,5
bottom of groove	≤6,3	≤1,6
groove face	≤15	≤3

tolerance recommendation

seal housing	tolerances
Ød	f8
ØD	H10

mode of installation

insert the male ring first, then the packing and finally the pressure ring (well greased) into the installation space. insert the metal insert without load, complete mounting of the system, tighten metal inserts slightly, let run in (10 to 20 idle strokes). finally tighten the metal insert to nominal height.

recommended mounting space:

the adjustment range of the mounting space height (L) should correspond to approx. 10% of the theoretical mounting length.

d f8 [mm]	p ≤ 100 [bar]	100 < p ≤ 200 [bar]	p > 200 [bar]
≤ 100	H10	H8	H8
> 100 ≤ 200	H10	H8	H7
>200	H9	H8	H7

insertion chamfer:

cs (mm)	c (mm)
cs (mm)	α = 15⁰ ... 20⁰	α = 20⁰ ... 30⁰
4	3.5	2
5	4	2.5
6	4.5	3
7.5	5	4
10	6	5
12.5	8.5	6.5
15	10	7.5
20	13	10

seal & housing recommendations

please note that we are able to produce those profiles to your specific need or any non standard housing. for detail measurements, please see Jet seal pars catalog...

this profile is only a replacement in already existing housings. use new sealing systems in new designs. the nominal width and seal diameter should be in accordance with following recommendations:

cs = (ØD - Ød)/2 [mm]	L [mm]
8	4
9	5
11	6
14	7.5
17	10
20	12.5
25	15
32	20

fitted:

don’t hesitate to contact our technical department for further information or for special requirements (temperature, speed etc.), so that suitable materi- als and/or designs can be recommended.

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