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Piston Seals

Parker piston seals for hydraulic and pneumatic cylinders and actuators are designed to separate applied pressure between the piston and the rod side during the stroke movement. They are available as single-acting and double acting seals in a wide range of compound and profile configurations to meet diverse applications: high and low temperatures and pressures, a wide variety of media, harsh operating conditions, various friction requirements, etc. Parker piston seals can cover working temperatures from -50°C to 230°C and working pressures up to 800 bar. Some seal profiles are insensitive to extreme pressure peaks. There are piston seals available that comply with ISO 6020, ISO 5597 and ISO 7425-1 standards.

NLA_zm

Head seal Prädifa series NLA

Media: Hydraulic

Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®), Ultra-High Molecular Weight Polyethylene (UHMWPE)

Maximum Operating Pressure: 200 bar

Minimum Operating Temperature: -200 to -190 °C

Maximum Surface Speed: 5 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Thermal Application Type: Expanded Low and High Temperature (< -35 C to 140 C) °C

Pressure Rating: Medium Pressure (< 250 bar) bar

The NLA product series is a FlexiSeal® design with a cantilever spring. It is ideally suited for static applications requiring greater flexibility of the seal cross-section (spring travel) due to higher coaxiality fluctuations between the rod and groove or due to excessive expansion and contraction (“breathing”). It is characterized by extremely high temperature and chemical resistance. NLA may also be used for dynamic applications (internal and external).

  • Symmetric lip design.
  • Cantilever spring for low load / high compliance behaviour.
  • Many high-resilience energizer options available, including choice of light, medium and heavy loads and NACE for oil field use.
  • Available with silicone filling for food and drug applications.
  • Allows the integration of a stand-off ring to protect the sealing lips in case of reverse pressure.
BA_zm

Symmetrical Rod and Piston Seal Prädifa series BA

Inside Diameter: 3 to 980 mm

Outside Diameter: 8.5 to 1005 mm

Thermal Application Type: Expanded Low and High Temperature (< -35°C to 140°C), High Temperature (< 205 C) °C, Low Temperature (< -35 C) °C, Standard moderate Temperature (-35 C to 100 C) °C

Pressure Rating: High Pressure (< 500 bar), Low Pressure (< 160 bar) bar

Media: Hydraulic

Unit of Measure: Length: mm

Polymer Material Options: Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Thermoplastic Copolyester Elastomer (TPC, TPE), Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM), Ethylene Propylene Rubber (EPM, EPR, EPDM)

Maximum Operating Pressure: 350 bar

Minimum Operating Temperature: -50 to -20 °C

Maximum Operating Temperature: 80 to 200 °C

Maximum Surface Speed: 0.5 m/sec

Cushioning Mechanism: No

The PARK-O-PAK® rod seal BA made of wear-resistant Ultrathan® is a compact seal design for hydraulic applications. Due to its symmetric design, the seal can also be used as a piston seal.

 The O-ring guarantees the pre-loading of the seal lips, even under low pressures or vacuum. Due to the good setting behavior of the elastomer O-ring, this pre-loading is largely constant. As system pressure increases, compression of the sealing edges rises due to the pressure-dependent deformation of the seal profile. There are three variants of the PARK-O-PAK® product series. The product series BA is suitable for standard grooves, e.g. according to ISO 5597. The product series SA is suitable for axially short compact designs. The product series TA is suitable for radially slim designs, e.g. for telescopic cylinders.

  • Robust seal profile for harshest operating conditions.
  • Extreme wear resistance.
  • Easier installation.
  • Insensitive to pressure peaks.
  • High extrusion resistance.
  • Excellent media resistance in case of suitable compound selection.
  • Suitable compounds available for special requirements of the chemical process industry.
  • Suitable compounds available for special requirements of the food processing industry.
  • Installation in closed and undercut housings.
  • Low compression set.
  • Further dimensions of machined series with short lead times available.

Range of application:

Mainly for the sealing of piston rods and plungers in heavy duty applications in mobile and stationary hydraulics.

The BA rod seal is available in the following compounds:

00030 – Industrial applications

00020 – Light-duty

00043 – Low temperatures

00064 – Heavy-duty

SA_zm

Symmetrical Rod and Piston Seal Prädifa series SA

Inside Diameter: 5 to 279.4 mm

Outside Diameter: 12 to 298.5 mm

Thermal Application Type: Expanded Low and High Temperature (< -35°C to 140°C), Standard moderate Temperature (-35 C to 100 C) °C

Pressure Rating: High Pressure (< 500 bar), Low Pressure (< 160 bar) bar

Media: Hydraulic

Polymer Material Options: Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Thermoplastic Copolyester Elastomer (TPC, TPE), Ethylene Propylene Rubber (EPM, EPR, EPDM)

Maximum Operating Pressure: 350 bar

Minimum Operating Temperature: -50 to -20 °C

Maximum Operating Temperature: 80 to 150 °C

Maximum Surface Speed: 0.5 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

The PARK-O-PAK® rod seal SA made of wear-resistant Ultrathan® is a compact seal design for hydraulic applications. Due to its symmetric design, the seal can also be used as a piston seal.

The O-ring guarantees the pre-loading of the seal lips, even under low pressures or vacuum. Due to the good setting behavior of the elastomer O-ring, this pre-loading is largely constant. As system pressure increases, compression of the sealing edges rises due to the pressure-dependent deformation of the seal profile.

There are three variants of the PARK-O-PAK® product series. The product series BA is suitable for standard grooves, e.g. according to ISO 5597. The product series SA is suitable for axially short compact designs. The product series TA is suitable for radially slim designs, e.g. for telescopic cylinders.

  • Robust seal profile for harshest operating conditions.
  • Extreme wear resistance.
  • Easier installation.
  • Insensitive to pressure peaks.
  • High extrusion resistance.
  • Excellent media resistance in case of suitable compound selection.
  • Suitable compounds available for special requirements of the chemical process industry.
  • Suitable compounds available for special requirements of the food processing industry.
  • Installation in closed and undercut housings.
  • Short axial assembly length.
  • Low compression set.
  • Further dimensions of machined series with short lead times available.

Range of application:

Mainly for the sealing of piston rods and plungers in heavy duty applications in mobile and stationary hydraulics.

The SA rod seal is available in the following compounds:

00030 – Industrial applications

00020 – Light-duty

00043 – Low temperatures

00064 – Heavy-duty

TA_zm

Symmetrical Rod and Piston Seal Prädifa series TA

Inside Diameter: 15 to 685.8 mm

Outside Diameter: 25 to 711.2 mm

Media: Hydraulic

Polymer Material Options: Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®)

Maximum Operating Pressure: 350 bar

Minimum Operating Temperature: -30 °C

Maximum Operating Temperature: 80 °C

Maximum Surface Speed: 0.5 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Thermal Application Type: Standard moderate Temperature (-35°C to 100°C)

Pressure Rating: High Pressure (< 500 bar)

The PARK-O-PAK® rod seal TA made of wear-resistant Ultrathan® is a compact seal design for hydraulic applications. Due to its symmetric design, the seal can also be used as a piston seal.

The O-ring guarantees the pre-loading of the seal lips, even under low pressures or vacuum. Due to the good setting behavior of the elastomer O-ring, this pre-loading is largely constant. As system pressure increases, compression of the sealing edges rises due to the pressure-dependent deformation of the seal profile.

There are three variants of the PARK-O-PAK® product series. The product series BA is suitable for standard grooves, e.g. according to ISO 5597. The product series SA is suitable for axially short compact designs. The product series TA is suitable for radially slim designs, e.g. for telescopic cylinders.

  • Robust seal profile for harshest operating conditions.
  • Extreme wear resistance.
  • Easier installation.
  • Insensitive to pressure peaks.
  • High extrusion resistance.
  • Excellent media resistance in case of suitable compound selection.
  • Suitable compounds available for special requirements of the chemical process industry.
  • Suitable compounds available for special requirements of the food processing industry.
  • Installation in closed and undercut housings.
  • Low compression set.
  • Further dimensions of machined series with short lead times available.

Range of application:

Mainly for the sealing of piston rods and plungers in heavy duty applications in mobile and stationary hydraulics.

The TA rod seal is available in the following compounds:

00030 – Industrial applications

00020 – Light-duty

00043 – Low temperatures

00064 – Heavy-duty

BondedPistonSeals_pd

Bonded Piston Seals

Polymer Material Options: Ethylene Acrylate Rubber (AEM), Fluorocarbon Rubber (FKM, FPM), Polyacrylate Rubber (ACM)

Materials of Construction: 1008, 1010, 1020 CRS

Operating Temperature: -30 to 200° °C

Pressure Rating: 50 to 70 ksi

For Fluid Type: Most Automatic Transmission Fluids, others can be tested in our lab, please request a quote.

Industry: Automotive, Heavy Duty, Fluid Power

Durometer: 65 to 85 Shore A (cap ring)

Application: Clutch, Transmission

Our design features one continuous rubber seal which bonds directly to the metal insert, reducing the overall cost and complexity of installation. The integral one-piece construction reduces the normal tight tolerances required in machined piston designs, while providing superior inner and outer seal characteristics.

Specific to transmission applications with temperatures in excess of 200 degrees centigrade and pressures up to 500 PSI. Parker can custom design a Bonded Piston Seal for a customer’s specific application. Parker’s bonded piston seals are cost effective, easy to install and light weight.

bpp_zm

PolyPak Hydraulic Seal with Beveled Lips (BPP)

Maximum Operating Pressure: 2000 to 7000 psi

Body Material: FKM, TPU, TPC-ET, EPDM, HNBR, XNBR

Spring Material: FKM, NBR, EPR

For Fluid Type: Various depending on material

Colour: Various depending on material

Thermal Application Type: Various depending on material °F

Durometer: 75 to 95 Shore A, 53 to 65 Shore D

Polymer Material Options: Fluorocarbon Rubber (FKM, FPM), Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Thermoplastic Copolyester Elastomer (TPC, TPE), Ethylene Propylene Rubber (EPM, EPR, EPDM), Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN), Nitrile Butadiene Rubber (NBR, XNBR)

Specifications Met: Various depending on material

Media: Hydraulic

Unit of Measure: Length: inch

Maximum Surface Speed: 100 (0.5 m/s) ft/min

AVAILABILITY:  A sampling of Parker’s part numbers are shown in the configurator above for select materials and sizes. If the material and dimensions required are not shown, assistance with part number configuration may be found in the literature documents in the Product Support tab. To check current tooling, review the Part Number Look-up document. Contact Parker for requirements outside typical ranges.

Parker’s Type B PolyPak® (BPP Profile) is a squeeze seal with a symmetrical profile for use in either rod or piston applications in hydraulic systems. The rectangular shape of its cross section ensures stability in the gland.  

The standard Molythane shell (seal body) provides high wear resistance and the O-ring energizer element functions as a spring to maintain sealing contact under low pressure or vacuum applications.   The bevelled lip design of the Type B PolyPak is excellent for cutting fluid film. The sharp beveled lip is formed by a precision knife trimming process.

A wide selection of sizes and alternate compounds allow this profile to match up with many hydraulic applications. The Type B PolyPak is an economical choice as a stand-alone seal or can be used in tandem with a buffer seal. In piston applications, this seal will function as a unidirectional seal. Dual Type B PolyPak seals should not be installed back-to-back in bi-directional pressure applications, as a pressure trap between the seals may occur. Instead, for bi-directional piston sealing, incorporate a PIP Ring®.

dpp_zm

Deep PolyPak Hydraulic Seal with Knife Trimmed Scraper Lips (DPP)

Maximum Operating Pressure: 2000 to 7000 psi

Minimum Operating Temperature: -65 °F

Maximum Operating Temperature: 400 °F

Body Material: FKM, TPU, TPCE, EPDM, XNBR, HNBR

Spring Material: FKN, NBR, EPR

For Fluid Type: Broad range, Oils, Water / Steam

Color: Black, Orange, Yellow

Durometer: 75 to 95 Shore A, 60 Shore D

Thermal Application Type: Varies depending on material

Polymer Material Options: Fluorocarbon Rubber (FKM, FPM), Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Thermoplastic Copolyester Elastomer (TPC, TPE), Ethylene Propylene Rubber (EPM, EPR, EPDM), Nitrile Butadiene Rubber (NBR, XNBR), Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN)

Specifications Met: Varies depending on material, includes API 6A (FF/HH) (10% Sour Gas)

Media: Hydraulic

Unit of Measure: Length: inch

Maximum Surface Speed: 100 (0.5 m/s) m/sec

AVAILABILITY: A sampling of Parker’s part numbers are shown in the configurator above for select materials and sizes. If the material and dimensions required are not shown, assistance with part number configuration may be found in the literature documents in the Product Support tab. To check current tooling, review the Part Number Look-up document. Contact Parker for requirements outside typical ranges. Parker’s Deep PolyPak® (DPP Profile) is a symmetrical profile squeeze seal for use in either rod or piston applications. Its rectangular shape ensures stability in the gland. The standard Molythane® shell provides high wear resistance and the O-ring energizer functions as a spring to maintain sealing contact under low pressure or vacuum applications.

The DPP Profile PolyPak seal’s scraper lip design cuts fluid film and moves contamination away from the seal. The sharp edge of the lip is formed by a precision knife trimming process during manufacture. A wide selection of sizes and alternate compounds allow this profile to match up with many hydraulic applications. The DPP Profile PolyPak seal is an economical choice as a stand-alone rod or piston seal. DPP Profile seals should not be installed back-to-back in bi-directional piston applications as a pressure trap between the seals may occur.

Standard Materials (Shell or Seal Body):

  • P4615A90 Molythane®; Temp -65 / +200F; Pressure* 5000 psi; Surface speed <1.6 ft/s
  • P4622A90 Ultrathane®; Temp -65 / +225F; Pressure* 5000 psi; Surface speed <1.6 ft/s
  • Z4651D60 PolyMyte®; Temp -65 / +275F; Pressure* 7000 psi; Surface speed <1.6 ft/s
  • N4263A90 Nitroxile®; Temp -20 / +275F; Pressure* 2000 psi; Surface speed <1.6 ft/s
  • E4207A90 Ethylene Propylene; Temp -65 / +300F; Pressure* 2000 psi; Surface speed <1.6 ft/s
  • V4266A95 FKM; Temp -5 / +400F; Pressure* 2250 psi; Surface speed <1.6 ft/s
  • V4208A90 FKM; Temp -5 / +400F; Pressure* 2000 psi; Surface speed <1.6 ft/s
  • N4007A95 HNBR; Temp -20 / +320F; Pressure* 2500 psi; Surface speed <1.6 ft/s

Please note: Pressure ratings shown are for predominantly dynamic applications. Where the application is predominantly static, as is typical in Oil & Gas applications, maximum pressure ratings may be extended by a factor of 2 to 3 (or greater), assuming nominal extrusion gap and operating temperature within limits. For assistance, please contact Parker’s application engineering team.

*Pressure ranges shown are for systems without wear rings. If using wear rings, please consult Engineering Section (Section 2) of Parker’s Fluid Power Seal Design Guide, Catalog EPS5370.

Energizer Spring Element Materials:

  • For seals with 4615 or 4622 PolyPak shell, the standard spring energizer is a nitrile o-ring
  • For seals with 4651 PolyPak seal body, the O-spring energizer code must be specified. The standard code is “N” for nitrile o-ring
  • For seals with rubber PolyPak seal body, standard spring energizer is an o-ring from the same rubber material family as the seal body.

Alternate Materials: For applications that may require an alternate material, please contact your Parker EPS representative.

psp_zm

PSP Profile, Double-Acting Hydraulic Piston Seal

Bore Diameter: 0,625 to 8.000 inch

Gland Depth: 0.121 to 0.237 inch

Maximum Operating Pressure: Up to 5000 psi

Minimum Operating Temperature: -35 °F

Maximum Operating Temperature: 275 °F

Elastomer: NBR

For Fluid Type: Petroleum base hydraulic oil, Water, depending on material

Durometer: 70 Shore A (energizer ring), 90 Shore A (cap ring), 60 Shore D (cap ring)

Colour: Tan, Yellow, Aqua

Thermal Application Type: Varies depending on material

Polymer Material Options: Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®)

Media: Hydraulic

Unit of Measure: Length: inch

Maximum Surface Speed: 100 (0.5 M/S) ft/min

O-Ring Dash Number: Various

A sampling of Parker’s part numbers are shown in the configurator above for select materials and sizes.   If the material and dimensions required are not shown, assistance with part number configuration may be found in the literature documents in the Product Support tab.  To check current tooling, review the Part Number Look-up document in the Product Support tab.  Contact Parker for requirements outside typical ranges.

PERFORMANCE ADVANTAGES

Parker’s PSP Profile is a squeeze type, polyurethane cap style piston seal for use in light to medium duty, bidirectional hydraulic applications. Available from proprietary Parker polyurethanes, the PSP offers low friction, abrasion and extrusion resistance. The lathe-cut nitrile elastomer energizer ensures resistance to compression set to increase seal life. The PSP profile’s geometry provides a fluid reservoir between the two sealing lips which holds system fluid, resulting in reduced breakaway and running friction.

The PSP Profile’s geometry provides a fluid reservoir between the two sealing lips which holds system fluid, resulting in reduced breakaway and running friction. Additional features of the PSP Profile include:

  • Designed to retrofit grooves for a single o-ring or an o-ring with two back-ups (wide)
  • Easy to install
  • Resists rolling and twisting in long stroke applications.

 

Available in polyurethanes, including Parker’s proprietary Resilon®, the PSP Profile provides

  • Long life
  • Extrusion resistance
  • Low compression set

Standard Materials:

  • P4622A90 Ultrathane® polyurethane; Temp -65 / +225F; Pressure* 5000 psi; Surface speed
bp_zm

BP Profile, Double-Acting Hydraulic Piston Seal

Bore Diameter: 1.5 to 8.002 inch; 32.0 to 200.0 mm

Gland Depth: 0.121 to 0.237 inch; 3.7 to 10.5 mm inch

Maximum Operating Pressure: Up to 7000 psi

Minimum Operating Temperature:-65 °F

Maximum Operating Temperature: 275 °F

Seal Material: P4304D60

Elastomer: NBR

Durometer: 70 Shore A (energizer ring), 60 Shore D (cap ring)

 

For Fluid Type: Petroleum base hydraulic oil

Colour: Brown

Thermal Application Type: Expanded low and high temperature (<-30F, >250F) °F

Polymer Material Options: Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®)

Media: Hydraulic

Maximum Surface Speed: 100 (0.5 M/S) ft/min

O-Ring Dash Number: Various

A sampling of Parker’s part numbers are shown in the configurator above for select materials and sizes.   If the material and dimensions required are not shown, assistance with part number configuration may be found in the literature documents in the Product Support tab.  To check current tooling, review the Part Number Look-up document in the Product Support tab.  Contact Parker for requirements outside typical ranges.

PERFORMANCE ADVANTAGES

Parker’s BP profile is a squeeze type, polyurethane cap piston seal for use in medium to heavy duty, bidirectional hydraulic applications.  This seal is primarily designed for linear applications but has been successfully used as a low speed rotary seal.  The standard material for this profile is Resilon® compound P4304D60, a proprietary Parker polyurethane offering higher wear resistance, extrusion resistance, and extended temperature range over 4304 polyurethane, compound P4304D60.  This is a proprietary Parker polyurethane offering higher wear resistance, greater extrusion resistance, and extended temperature range over standard grade polyurethanes.  The Resilon 4304 cap is energized using a resilient nitrile elastomer offering low compression set. The BP profile’s geometry provides a fluid reservoir between the two sealing lips which holds system fluid, resulting in reduced breakaway and running friction.  Additional features of the BP Profile include:

  • Designed to retrofit o-ring grooves
  • Easy to install
  • Resists rolling and twisting in long stroke applications.

Available in Parker’s proprietary Resilon polyurethane, the BP Profile provides

  • Long life
  • Extrusion resistance
  • Low compression set
  • Shock load resistance, and
  • Excellent sealing performance at zero pressure
8400_zm

Light Load U-Cup Seal with Beveled Lip

Groove Width: 0.062 to 0.500 inch

Maximum Operating Pressure: 2000 psi – Oil; 250 psi – Air psi

Minimum Operating Temperature: -65 °F

Maximum Operating Temperature: 400 °F

For Fluid Type: Airl Oil, Broad range, Water / Steam, Oil, Fuel, Low Temp Water, Drilling Mud, Water Glycol, Acide/Base, Water, Steam, Acid, Skydrol, Air

Colour: Black

Durometer: 80 to 90 Shore A

Thermal Application Type: Low temperature (<-30F), Standard temperature (-30F to 250F), High temperature (260F – 400F), Expanded low and high temperature (<-30F, >250F) °F

Specifications Met: none

Media: Multiple

Unit of Measure: Length: Inch

Pressure Rating: Hydraulic to 2000 psi

Maximum Surface Speed: 0.5 m/sec, 1 m/sec

Seal Type: Light load symmetrical U-cup with beveled cut ID and OD lip style

Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM), Ethylene Propylene Rubber (EPM, EPR, EPDM)

A sampling of Parker’s part numbers are shown in the configurator above for select materials and sizes. If the material and dimensions required are not shown, assistance with part number configuration may be found in the literature documents in the Product Support tab. To check current tooling, review the Part Number Look-up document. Contact Parker for requirements outside typical ranges.

Parker’s 8400 Profile U-cup is a light load, symmetrical lip seal for use in either rod or piston sealing applications. The thin, flexible lip design reacts to low pressure and provides an extremely smooth, steady movement with less break away force required because of the inherent low friction. The 8400 style utilizes a beveled lip, ideal for wiping fluid film. Available in a variety of elastomer compounds to cover a wide range of applications. The 8400 U seal is primarily designed for pneumatic applications to 250 psi, however, it can also be used in low to medium pressure hydraulic applications. The pressure range of the U ring seal may be extended by incorporating an 8700 Series anti-extrusion back-up.

Standard Materials:

  • N4180A80 NBR; Temp -40 / +250F; Pressure* 1,250 psi hydraulic (250 psi pneumatic); Surface speed** <1.6 ft/s
  • N4274A85 XNBR; Temp -10 / +250F; Pressure* 1,750 psi hydraulic (250 psi pneumatic); Surface speed** <1.6 ft/s
  • V4208A90 FKM; Temp -5 / +400F; Pressure* 2,000 psi hydraulic (250 psi pneumatic); Surface speed** <1.6 ft/s
  • E4259A80 EPDM; Temp -65 / +300F; Pressure* 1,250 psi hydraulic (250 psi pneumatic); Surface speed** <1.6 ft/s

*Pressure range shown is for systems without wear rings. If used with wear rings, consult Engineering Section (Section2) of Parker’s Fluid Power Seal Design Guide, Catalog EPS5370.

**Surface speed for pneumatic applications <3.3 ft/s

Alternate Materials: For applications that may require an alternate material, please contact your Parker EPS representative.

fbc-v_zm

Low Friction FlexiSeal with Beveled Lips

For Fluid Type: Ultra broad range, General / Other, Oils

Color: White, Turquoise, Gold, Gray, Black, Brown, Tan, Purple, Translucent, Natural

Durometer: 55 to 72 Shore D

Thermal Application Type: Low temperature (<-30F), Expanded low and high temperature (<-30F, >250F) °F

Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®), Ultra-High Molecular Weight Polyethylene (UHMWPE), Thermoplastic Copolyester Elastomer (TPC, TPE)

Industry Application:Difficult environments which may include:

Harsh chemicals and solvents

Abrasive media

High temperatures to +600F

Cyrogenic temperatures down to -450F

Unlubricated applications

Low friction requirements

High pressures to 10,000

Maximum Operating Pressure: Vacuum to 10,000 psi

Minimum Operating Temperature: -425 °F

Maximum Operating Temperature: 600 °F

 

Specifications Met: FDA/NSF Compliant

Media: Multiple Fluids

Maximum Surface Speed: 0.5 m/sec

Seal Type: Symmetrical spring-energized U-cup with beveled lip style for maximum sealing ability on ID and OD

Due to the customized nature of this product, only a sampling of Parker’s part numbers are shown.  If the materials and dimensions you need are not shown, assistance with part number configuration may be found in the literature document in the Product Support tab. 

Parker’s FBC-V series FlexiSeal™ is a symmetrical spring-energized PTFE lip seal for rod and piston featuring beveled style lips, and cantilever spring for maximum ID & OD sealing.  FlexiSeal profiles utilize a variety of PTFE jacket profiles, spring types and materials.  PTFE and other machinable high performance materials of construction are used where elastomeric seals fail to meet an application’s temperature range, chemical resistance or friction requirements and deliver advantages which include:

  • Low friction
  • Wide temperature range (-450F to +600F)
  • Ultra broad chemical compatibility
  • Dry running ability in dynamic sealing applications
  • Resistance to degradation, heat aging and physical property alteration during temperature cycling
  • High surface speed

FBC-V series FlexiSeals are precision machined to fit inch/fractional or metric rod and piston glands.      Standard Materials (seal jacket or body): 

  • 0100, Virgin PTFE
  • 0102, Modified PTFE
  • 0120, Mineral Filled PTFE
  • 0127, Mineral Filled PTFE — FDA compliant for rotary applications
  • 0128, Mineral Filled PTFE — Antimicrobial
  • 0203, Fiberglass Filled PTFE
  • 0204, Fiberglass and MoS2 Filled PTFE
  • 0301, Graphite Filled PTFE
  • 0307, Carbon-Graphite Filled PTFE
  • 0405, Stainless Steel Filled PTFE
  • 0502, Carbon Fiber Filled PTFE
  • 0601, Aromatic Polyester Filled PTFE
  • 0615, Proprietary Low Wear PTFE
  • 0901, UHMW Polyethylene
  • 0913, Hytrel® Unlubricated Thermoplastic Elastomer

Spring materials:  Medium load cantilever springs are available in corrosion-resistant metal alloys, including stainless steel and Elgiloy.

Alternate Materials:  For applications that may require an alternate material, please contact your Parker EPS representative.

Lip Style:  The beveled (or chamfered) ID and OD lip shape allows for ease of installation and permits lubrication to nest under the lip and feed through in reciprocating dynamic applications.  The result is a microscopic film of lubrication that increases seal and hardware service life.  The beveled lip creates a narrow contact footprint which concentrates sealing force on a single point, maximizing sealing ability and minimizing friction.

Pressure Rating:  Standard FlexiSeal designs are rated to 3,000 psi when used in glands conforming to the dimensions supplied in Parker’s PTFE Lip Seal Design Guide, Catalog EPS5340, using materials that meet the temperature requirements of the application.  Extended heel radial FlexiSeals are available which increase the pressure rating to 10,000 psi under the same conditions. 

Features of the FBC-V series compared to alternate Parker FlexiSeal profiles:

  • Film Breaking Ability: Very High
  • Low Pressure Sealing Ability: Very Good
  • Friction: Medium
  • Contamination Exclusion: Low
  • Good in Abrasive Media: No
  • Available in Mil-G-5514 Glands: Yes
DE_zm

Complete piston with integrated seals Prädifa series DE

Thermal Application Type: High Temperature (< 205°C), Expanded Low and High Temperature (< -35 C to 140 C) °C, Standard moderate Temperature (-35 C to 100 C) °C

Media: Pneumatic

Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN), Fluorocarbon Rubber (FKM, FPM), Ethylene Propylene Rubber (EPM, EPR, EPDM)

Maximum Operating Pressure: 12 bar

Minimum Operating Temperature: -50 to -10 °C

Maximum Operating Temperature: 80 to 200 °C

Maximum Surface Speed: 1 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: Yes

Pressure Rating: Pneumatic Pressure (< 16 bar)

The single-acting pneumatic complete piston DE is a two-component seal design, consisting of a metallic carrier with a vulcanized guiding surface and sealing lip. The complete piston performs three functions: sealing, guiding and end position cushioning.

  • Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
  • Cushioning buffers on the piston´s front faces with integrated ventilation ducts provide for mechanical cushioning of the cylinders.
  • Multi-functional element: seal, guiding and cushioning element.
  • Immediate response (full pressure load) thanks to incorporated venting channels.
  • Good wear resistance.
  • Ideal corrosion protection thanks to complete elastomer covering.
  • Smooth running due to optimum adjustment of the functional lips.
  • Easy attachment to the piston rod without additional sealing elements.
  • Easy installation due to integrated static sealing function.
  • Excellent media resistance in case of suitable compound selection.
  • Also available as double-acting version.
  • Low assembly height of the complete piston enables short cylinder designs.
  • Versatile complete piston for nearly all cylinder designs.

Range of application:

Complete piston for single-acting pneumatic cylinders with end cushioning, provided that no excessive lateral guidance loads will occur (long strokes and buckling).

The DE complete piston with integrated seals is available in the following compounds:

Z5117 – Industrial applications

Z5142 – High temperatures

EK_zm

Complete piston with integrated seals Prädifa series EK

Thermal Application Type: High Temperature (< 205°C), Standard moderate Temperature (-35 C to 100 C) °C

Media: Pneumatic

Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM)

Maximum Operating Pressure: 16 bar

Minimum Operating Temperature: -30 to -20 °C

Maximum Operating Temperature: 80 to 200 °C

Maximum Surface Speed: 1 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Pressure Rating: Pneumatic Pressure (< 16 bar)

The single-acting pneumatic complete piston EK is a two-component seal design, consisting of a metallic carrier with a vulcanized guiding surface and sealing lip. The complete piston performs two functions: sealing and guiding.

  • Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
  • Immediate response (full pressure load) thanks to incorporated venting channels.
  • Good wear resistance.
  • Ideal corrosion protection thanks to complete elastomer covering.
  • Smooth running due to optimum lubricant-retaining sealing lip geometry.
  • Easy attachment to the piston rod without additional sealing elements.
  • Easy installation due to integrated static sealing function.
  • Excellent media resistance in case of suitable compound selection.
  • Also available as double-acting version.
  • Low assembly height of the complete piston enables short cylinder designs.
  • Versatile complete piston for nearly all cylinder designs.

Range of application:

Complete piston for single-acting pneumatic cylinders with and without end position cushioning, provided that no excessive lateral guidance loads will occur (long strokes and buckling).

C2_zm

Piston seal Prädifa series C2

Thermal Application Type: Standard moderate Temperature (-35°C to 100°C), High Temperature (< 205 C) °C, Expanded Low and High Temperature (< -35 C to 140 C) °C, Low Temperature (< -35 C) °C

Media: Hydraulic

Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM), Ethylene Propylene Rubber (EPM, EPR, EPDM), Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN)

Maximum Operating Pressure: 160 bar

Minimum Operating Temperature: -50 to -5 °C

Maximum Surface Speed: 0.5 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Pressure Rating: Low Pressure (< 160 bar)

Maximum Operating Temperature: 80 to 200 °C

The C2 piston seal is a lip seal which sits tightly on the inner diameter. Although cross-sections and heights are very small, the sealing performance is excellent. Extremely low friction is experienced because of the short contact to the sealing surface area. For installation in non-lubricated pneumatic systems (dry air) we recommend our profile E4.

  • Good wear resistance.
  • Easier installation.
  • Suitable for fully automatic installation.
  • Assembly on one-part piston is possible.
  • High temperature resistance in case of suitable compound selection.
  • Excellent media resistance in case of suitable compound selection.
  • Suitable compounds available for special requirements of the chemical process industry.
  • Suitable compounds available for special requirements of the food processing industry.
  • Installation in closed and undercut housings.

Range of application:

Particularly recommended for pistons in hydraulic and pneumatic cylinders.

E4_zm

Piston seal Prädifa series E4

Thermal Application Type: Standard moderate Temperature (-35°C to 100°C), High Temperature (< 205 C) °C, Expanded Low and High Temperature (< -35 C to 140 C) °C, Low Temperature (< -35 C) °C

Media: Pneumatic

Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Fluorocarbon Rubber (FKM, FPM), Ethylene Propylene Rubber (EPM, EPR, EPDM)

Maximum Operating Pressure: 16 to 17 bar

Minimum Operating Temperature: -50 to -5 °C

Maximum Operating Temperature: 80 to 200 °C

Maximum Surface Speed: 1, 0.5 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Pressure Rating: Pneumatic Pressure (< 16 bar)

The E4 piston seal is a lip seal specifically developed for use in pneumatics. The dimensions of the standard series correspond to the cylinder diameters according to ISO 3320, CETOP RP 52 P, RP 43 P and RP 53 P. The E4 piston seal is available in both Ultrathan® and rubber compounds. The Ultrathan® versions are extremely resistant against wear and pressure peaks.

  • Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
  • Suitable for cylinders with dead-center cushioning.
  • Good wear resistance.
  • Long service life thanks to application-optimized compounds.
  • Smooth running due to optimum lubricant-retaining sealing lip geometry.
  • Easier installation.
  • Suitable for fully automatic installation
  • Assembly on one-part piston is possible.
  • High temperature resistance in case of suitable compound selection.
  • Excellent media resistance in case of suitable compound selection.
  • Installation in closed housings.
  • Special seal geometry ensures optimal function even in case of flow-controlled exhaust air.

Range of application:

Mainly used for pneumatic cylinders.

  • Good wear resistance.
  • Easier installation.
  • Suitable for fully automatic installation.
  • Assembly on one-part piston is possible.
  • High temperature resistance in case of suitable compound selection.
  • Excellent media resistance in case of suitable compound selection.
  • Suitable compounds available for special requirements of the chemical process industry.
  • Suitable compounds available for special requirements of the food processing industry.
  • Installation in closed and undercut housings.

Range of application:

Particularly recommended for pistons in hydraulic and pneumatic cylinders.

M4_zm

Piston sealing set Prädifa series M4

Thermal Application Type: High Temperature (< 205°C), Standard moderate Temperature (-35 C to 100 C) °C

Media: Hydraulic

Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM)

Maximum Operating Pressure: 500 bar

Minimum Operating Temperature: -40 to -20 °C

Maximum Operating Temperature: 100 to 200 °C

Maximum Surface Speed: 0,5 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Pressure Rating: High Pressure (< 500 bar)

The M4 piston sealing set consists of a chevron packing with a pressure ring and a spacer ring. The seal’s profile is robust and suitable for harshest operating conditions. The choice of compound for the chevron allows this sealing set to be adapted to various operating conditions. For example, the chevron packing may also be supplied from a suitable rubber compound without fabric reinforcement for low-temperature or extremely high sealing requirements.

  • Robust seal profile for harshest operating conditions.
  • Insensitive to contamination of the operating medium or slight damage of the sliding surfaces compared with single-part seals.
  • The seals can also be cut for installation, which eliminates the need for complete dismantling of the cylinder during maintenance or repair work.
  • Insensitive to pressure peaks.
  • High extrusion resistance.
  • Excellent media resistance in case of suitable compound selection.
  • Enables modifications of axial preload and/or readjustment by means of metal spacers (shims or screw rings).

Range of application:

Preferably for use with double-acting pistons in hydraulic cylinders.

MK_zm

Piston seal Prädifa series MK

Thermal Application Type: Low Temperature (< -35°C), Standard moderate Temperature (-35 C to 100 C) °C

Media: Pneumatic

Polymer Material Options: Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®)

Maximum Operating Pressure: 12 bar

Minimum Operating Temperature: -45 to -30 °C

Maximum Operating Temperature: 80 to 95 °C

Maximum Surface Speed: 1 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: Yes

Pressure Rating: Pneumatic Pressure (< 16 bar)

The MK piston seal made of wear-resistant Ultrathan® is a sealing element with an integrated guiding surface and cushioning buffers. This seal-guide element can be used both on pistons with or without a permanent magnet. When used in magnetic pistons, the seal-guide element encapsulates the permanent magnet. The front-end cushioning buffers serve to absorb shocks. For double-acting cylinder designs, the

MK seal profile may also be used in a back-to-back arrangement.

  • The asymmetrical retention groove ensures optimum positive connection between the sealing element and the piston.
  • Cushioning buffers on the piston´s front faces with integrated ventilation ducts provide for mechanical cushioning of the cylinders.
  • Multi-functional sealing element. The guiding area at the sealing element performs the guiding function in the cylinder. However, due to its geometry the sealing element is not suitable for absorption of high radial forces or long strokes.
  • Multi-functional element: seal, guiding and cushioning element.
  • Optimal front-side sealing effect due to favourable cushioning buffer geometry.
  • Prevents metallic contact between the piston and cylinder. Ideal for light-metal and plastic cylinders (ridging).
  • Long service life thanks to application-optimized compounds.
  • Easier installation.
  • Assembly on one-part piston is possible.
  • Excellent media resistance in case of suitable compound selection.
  • Low compression set.

Range of application:

For use in pneumatic cylinders

B8_zm

Piston seal Prädifa series B8

Media: Hydraulic

Polymer Material Options: Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Nitrile Butadiene Rubber (NBR, XNBR)

Maximum Operating Pressure: 500, 400 bar

Minimum Operating Temperature: -35 to -20 °C

Maximum Operating Temperature: 100 to 110 °C

Maximum Surface Speed: 0,5 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Thermal Application Type: Standard moderate Temperature (-35°C to 100°C)

Pressure Rating: Extremely High Pressure (< 800 bar), High Pressure (< 500 bar) bar

The B8 Ultrathan® piston seal is a lip seal with interference fit. It is extremely wear resistant, resistant to pressure peaks and ensures reliable load holding. It is suitable for hydraulic high-pressure applications.

  • Robust seal profile for harshest operating conditions.
  • Extreme wear resistance.
  • Assembly on one-part piston is possible.
  • Insensitive to extreme pressure peaks.
  • Extremely high extrusion resistance.
  • Excellent media resistance in case of suitable compound selection.
  • Suitable compounds available for special requirements of the food processing industry.
  • Suitable compounds available for special requirements of the chemical process industry.
  • Dimensions according to ISO 5597.
  • Installation in closed and undercut housings.
  • Additional sizes of machined products available on short notice.

Range of application:

Mainly for sealing pistons in heavy-duty applications in mobile and stationary hydraulics

Z7_zm

Piston seal Prädifa series Z7

Thermal Application Type: High Temperature (< 205°C), Expanded Low and High Temperature (< -35 C to 140 C) °C, Standard moderate Temperature (-35 C to 100 C) °C

Media: Pneumatic

Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM), Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN)

Maximum Operating Pressure: 16 bar

 

Maximum Surface Speed: 1 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Pressure Rating: Pneumatic Pressure (< 16 bar)

Minimum Operating Temperature: -30 to -20 °C

Maximum Operating Temperature: 100 to 200 °C

The Z7 pneumatic piston seal is an U-ring with an integral guiding surface for single-acting pistons, ensuring high sealing performance due to the seal lip design.

  • Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
  • Multi-functional sealing element. The guiding area at the sealing element performs the guiding function in the cylinder. However, due to its geometry the sealing element is not suitable for absorption of high radial forces or long strokes.
  • Prevents metallic contact between the piston and cylinder. Ideal for light-metal and plastic cylinders (ridging).
  • Good wear resistance.
  • Smooth running due to optimum lubricant-retaining sealing lip geometry.
  • Easier installation.
  • Assembly on one-part piston is possible.
  • High temperature resistance in case of suitable compound selection.
  • Excellent media resistance in case of suitable compound selection.
  • Installation in open housings with retaining collar.

Range of application:

For use in pneumatic cylinders.

BHO_zm

Piston seal Prädifa series BHO

Media: Multiple Fluids

Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®), Ultra-High Molecular Weight Polyethylene (UHMWPE)

Maximum Operating Pressure: 550 bar

Minimum Operating Temperature: -200 to -190 °C

Maximum Operating Temperature: 80 to 230 °C

Maximum Surface Speed: 15 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Thermal Application Type: Extremely High Temperature (> 205°C)

Pressure Rating: High Pressure (< 500 bar)

The BHO product series is a single-acting piston seal featuring a FlexiSeal® design with a helicoil spring. It stands out due to its extreme temperature and chemical resistance and is ideal for higher-pressure applications.

  • Extended heel that reduces effects of extrusion.
  • Heavy dynamic lip (outside) ensures longest life.
  • Short, wiper-type dynamic lip reduces frictional forces due to hydrostatic pressure.
  • Helical spring for high load and small deflection range.
  • Squared, long static lip stabilizes the seal.
  • Widest range of cross-sections and diameters available, including sizes for upgrading standard O-ring grooves.
  • Many high-resilience energizer options available, including choice of light, medium and heavy loads and

NACE for oil field use.

  • Low-cost elastomeric energizers available, all with excellent fatigue resistance.

Range of application:

For high-pressure applications in reciprocating pistons.

Z8_zm

Piston seal Prädifa series Z8

Thermal Application Type: Standard moderate Temperature (-35°C to 100°C), High Temperature (< 205 C) °C, Expanded Low and High Temperature (< -35 C to 140 C) °C, Low Temperature (< -35 C) °C

Media: Pneumatic

Polymer Material Options: Hydrogenated Nitrile Butadiene Rubber (HNBR, HSN), Nitrile Butadiene Rubber (NBR, XNBR), Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Fluorocarbon Rubber (FKM, FPM), Ethylene Propylene Rubber (EPM, EPR, EPDM)

Maximum Operating Pressure: 16 bar

Minimum Operating Temperature: -50 to -5 °C

 

Maximum Operating Temperature: 80 to 200 °C

Maximum Surface Speed: 1 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Pressure Rating: Pneumatic Pressure (< 16 bar)

The Z8 cylinder seal is a single-acting U-ring for pistons in pneumatic cylinders and valves. It is characterized by small axially installed dimensions. The standard range of the Z8 product series conforms to the cylinder diameters acc. to ISO 3320 and CETOP RP 52 P, RP 43 P and RP 53 P.

The Z8 product series is available in both Ultrathan® and rubber compounds. The Ultrathan® versions are characterized by extremely high resistance against wear and pressure peaks.

  • Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
  • Good sealing performance in extremely small assembly conditions.
  • Good wear resistance.
  • Low static and dynamic friction thanks to miniaturized design.
  • Smooth running due to optimum lubricant-retaining sealing lip geometry.
  • Easier installation.
  • High temperature resistance in case of suitable compound selection.
  • Excellent media resistance in case of suitable compound selection.
  • Installation in closed and undercut housings.

Range of application:

For use in pneumatic cylinders.

KS_zm

Piston sealing set Prädifa series KS

Media: Hydraulic

Polymer Material Options: Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®)

Maximum Operating Pressure: 350, 250 bar

Minimum Operating Temperature: -40 to -30 °C

Maximum Operating Temperature: 80 °C

Maximum Surface Speed: 3 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Thermal Application Type: Standard moderate Temperature (-35°C to 100°C)

Pressure Rating: High Pressure (< 500 bar)

The KS piston sealing set made of wear-resistant Ultrathan® has been developed specifically for sealing floating pistons in dual media piston-type accumulators. It consists of two U-rings with differences in terms of design and compound. The shape of the seals makes the KS piston sealing set ideally suited for reliable, low-friction separation of different pressure fluids (oil/gas). Other applications include industrial shock absorbers and hydro-pneumatic elements such as feed and braking units, pressure converters, pressure transducers and working cylinders.

  • Robust seal profile for harshest operating conditions.
  • Extreme wear resistance.
  • Assembly on one-part piston is possible.
  • High extrusion resistance.
  • Excellent media resistance in case of suitable compound selection.
  • Suitable compounds available for special requirements of the chemical process industry.
  • Suitable compounds available for special requirements of the food processing industry.
  • Dimensions according to ISO 5597.
  • Installation in closed and undercut housings.
  • Further dimensions of machined series with short lead times available.

Range of application:

For hydraulic piston accumulators. Other applications include industrial shock absorbers and hydropneumatic elements such as feed and braking units, pressure converters, pressure transducers and working cylinders.

NG_zm

Piston sealing set Prädifa series NG

Thermal Application Type: High Temperature (< 205°C), Standard moderate Temperature (-35 C to 100 C) °C

Media: Hydraulic

Polymer Material Options: Fluorocarbon Rubber (FKM, FPM), Nitrile Butadiene Rubber (NBR, XNBR)

Maximum Operating Pressure: 250 bar

Minimum Operating Temperature: -40 to -20 °C

Maximum Operating Temperature: 100 to 200 °C

Maximum Surface Speed: 0,5 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Pressure Rating: Medium Pressure (< 250 bar)

The two-piece sealing set consists of a rubber/fabric U-ring and a back-up ring. It is extremely wear-resistant and delivers reliable performance even in the most adverse conditions (water or particle contamination).

  • Simple installation in axially open grooves.
  • Cylinder diameter dimensions according to ISO 3320. Non-standard sizes are found on the following pages.
  • Suitable for commercially available mineral oils; other compounds are also available for synthetic media, emulsions and brake fluids.
  • With a rubber header use as a rod seal is also possible.

Range of application:

Sealing of pistons in hydraulic cylinders. For double-sided pressure loading the seal profile must be used in a back-to-back arrangement.

OG_zm

Piston sealing set Prädifa series OG

Thermal Application Type: High Temperature (< 205°C), Expanded Low and High Temperature (< -35 C to 140 C) °C, Standard moderate Temperature (-35 C to 100 C) °C

Media: Hydraulic

Polymer Material Options: Polytetrafluoroethylene (PTFE, mPTFE, TFM, Polon®), Thermoplastic Polyurethane (TPU, Resilon®, Ultrathan®), Ultra-High Molecular Weight Polyethylene (UHMW-PE)

Maximum Operating Pressure: 400 bar

Minimum Operating Temperature: -40 to -25 °C

Maximum Operating Temperature: 110 to 200 °C

Maximum Surface Speed: 4 m/sec

Unit of Measure: Length: mm

Cushioning Mechanism: No

Pressure Rating: High Pressure (< 500 bar)

The single-acting OG piston sealing set featuring a Slipper Seal® design consists of a PTFE piston sealing ring and an elastomer O-Ring as a preloading element. The asymmetrical cross-section of the sealing ring is designed for best drag oil performance during stroke in both directions. The OG sealing set is particularly suitable for single-acting pistons in control cylinders, servo controlled systems, machine tools and quickacting cylinders. Due to the material combination of the slide ring (PTFE) and the O-ring (elastomer), this product is suitable for a wide range of applications, especially for aggressive media and/or high temperatures. Several compounds can alternatively be selected according to the specific application profile.

  • Good sealing performance in extremely small assembly conditions.
  • Excellent wear resistance.
  • Minimal break-away and dynamic friction and no stick-slip tendency ensures uniform motion even at low speeds.
  • Good energy efficiency due to low friction.
  • Insensitive to pressure peaks.
  • High temperature resistance assured by suitable O-Ring compound selection.
  • High extrusion resistance.
  • Adaptable to nearly all media thanks to high chemical resistance of the sealing ring and large O-Ring compound selection.
  • Dimensions according to ISO 7425-1.
  • Also available as double-acting version.
  • Short axial assembly length.
  • Installation in closed and undercut housings.
  • Available in diameters from 4 to 3000 mm.
  • Further dimensions of machined series with short lead times available.

Range of application:

For high-pressure applications.

The OG sealing set is particularly suitable for single-acting pistons in control cylinders, servo controlled systems, machine tools and quick-acting cylinders.