Machined PTFE Seals

Profile

Name

Operating Range

Summary

Profile AB25 is best known as a low-friction composite Wiper Seal and consists of a PTFE or Hard PU scraper element and an elastomeric O-Ring.

The O-Ring energises the low-friction scraper element to provide an effective barrier to help prevent ingress penetrating into the gland and contaminating the hydraulic system fluid.

By using material combinations of PTFE and an elastomer O-Ring this product can be made suitable for a wide range of applications that may see high temperatures and/or aggressive media.

Profile AB26 is a double acting composite Wiper Seal which consists of a main PTFE or Hard PU scraper element and two elastomer O-Rings.

The O-Rings energise the scraper element and provide an effective barrier to stop ingress penetrating into the housing. The AB26 provides two functions, a positive scarping action to prevent ingress of foreign particles into the system and a sealing action which prevents residual oil film from escaping into the environment when the piston rod is extended.

By using material combinations of PTFE and an elastomer O-Ring this product can be made suitable for a wide range of applications that may see high temperatures and/or aggressive media.

Profile AB27 is a double acting composite Wiper Seal which consists of a main PTFE or Hard PU scraper element and elastomer O-Ring. The O-Ring energises the scraper element and provides an effective barrier to stop ingress penetrating into the housing.

The AB27 provides two functions, a positive scraping action to prevent ingress of foreign particles into the system and a sealing action which prevents residual oil film from escaping into the environment when the piston rod is extended. The special design of the AB27 helps retain initial lubrication reducing breakout friction in high speed or friction critical applications.

By using material combinations of PTFE and an elastomer O-Ring this product can be made suitable for a wide range of applications that may see high temperatures and/or aggressive media.

Profile AB31 is a double acting composite Wiper Seal which consists of a PTFE element and two elastomer O-Rings.

This seal design has increased leak tightness and scraping ability compared to other types of composite wiper seals and It is usually seen in heavy industries such as steel mills and normally where large diameters are required.

The AB31 provides two functions, a positive scraping action to prevent ingress of foreign particles into the system and a positive sealing action which prevents residual oil film from escaping into the environment when the piston rod is extended. When using this seal, a pressure relieving bore is usually introduced between this part and the rod seal.

By using a combination of a PTFE scraping element and an elastomer O-Ring this product can be made suitable for a wide range of applications that may see high temperatures and/or aggressive media.

DMR Seals FB01 profile is a tight tolerance guide ring / wear ring which can be manufactured from a number of our high-performance thermoplastic materials to provide precise clearance control of mating metallic hardware members in fluid power or pneumatic systems.

The tight tolerance control on the FB01 profile ensures excellent bearing contact which helps minimise and control misalignment while the piston or rod is under static or dynamic load which helps significantly increase seal life when compared to high volume moulded rings.

FB01 is supplied either in solid format or split for ease of installation and can be supplied with spiral grooves on the main contact surface to prevent entrapped pressure between the seal and the guide ring itself. The addition of these grooves can also help eliminate jet-erosion, which is where the high-pressure fluid of the hydraulic system is forced through the localised split in the ring and damages the seal.

Please contact our technical department for further information on the correct material choice for your application.

Profile KB08 seal is a compact double acting / bi-directional composite piston Seal which consists of a main PTFE or Hard PU sealing element and elastomer O-Ring energiser.

The O-Ring energises the sealing element and provides an effective leak free barrier around the inside diameter of the seal groove under static conditions.

The KB08 can be used in conjunction with our KB08B profile to provide a complete leak free sealing configuration or where sealing redundancy is required.

By using the combination of a PTFE sealing element and an elastomer O-Ring this product can be made suitable for a wide range of situations including low friction, high temperature or where aggressive chemical media is the main system fluid.

The KB08A profile is a heavy-duty piston composite seals which is a modification of our standard KB08 profile. Originally designed for un-standard housing sizes for the hydraulic cylinder repair market but also commonly used in large diameter heavy duty applications where extra sealing force or increased stability in the groove is required.

The seals energiser is an elastomer profile which prevents seal roll in the groove and provides the seal with added stability in comparison to standard O-Ring energisers.

This double acting piston seal is available in many combinations of our high-performance materials to provide the design engineer or repairer with the optimum solution for their sealing application.

Profile KB08B is a compact single acting / uni-directional composite Piston Seal which consists of a main PTFE or Hard PU sealing element and elastomeric O-Ring energiser.

The O-Ring energises the sealing element and provides an effective leak free barrier around the inside diameter of the seal groove under static conditions.

The special design of the KB08B profile allows trapped fluid pressure to be released back into the system when the piston is on its return stroke. Because of this feature this seal can be used in multiple or in conjunction with our KB08 profile to provide a complete leak free sealing configuration or where sealing redundancy is required.

By using a combination of a PTFE sealing element and the correct choice of elastomeric O-Ring energizer this product can be made suitable for a wide range of situations including low friction, high temperature or where aggressive chemical media is the main system fluid.

Our KB08C profile is a heavy-duty modification of the standard KB08B piston composite seal profile. Originally designed for non-standard housing sizes for the repair market but now commonly used in large diameter heavy duty applications where extra sealing force or increased stability in the groove is required.

The energizer is an elastomer profile which prevents roll in the groove and provides the seal with added stability in comparison to standard O-Rings.

This seal is available in many combinations of our high-performance materials to provide the design engineer or repairer with the optimum solution for their sealing application.

Profile KB08E is a modification of our standard KB08 profile. The side walls of the seal are tapered away from the groove walls and the clearance gap between the mating hardware. This feature helps the seal withstand higher pressures than the normal design or allows the design engineer freedom to increase the clearance gap between the metalwork helping to prevent possible metal-to-metal contact and subsequent damage.

The seal is a compact double acting /bi-directional piston composite seal which consists of either a main PTFE or Hard PU sealing element and an elastomeric O-Ring energiser.

The O-Ring energises the sealing element and provides an effective leak free barrier around the outside diameter of the seal groove.

By using the combination of a PTFE sealing element and the correct elastomer O-Ring this product can be made suitable for a wide range of situations including low friction, high temperature or where aggressive chemical media is the main system fluid.

Designed for use on one-piece solid pistons the KB09A is a 4-piece double acting/bi-directional piston seal comprising of a central filled PTFE sealing element, elastomeric energising ring and precision machined thermoplastic guide rings which are split to allow assembly onto the solid piston.

The precision machined guide/wear rings allow higher working pressures and larger clearance gaps between the hardware components.

The central sealing element is energised by the elastomer ring which provides initial radial compression upon installation to provide low pressure sealing, when subjected to system pressure the seal energises to provide further compressive force and leak tightness. While offering extrusion resistance the guide rings also support and centralise the piston head while reciprocating in the hydraulic cylinder and help prevent metal to metal contact under side load conditions

The KB09A can be offered in several material combinations for use in high temperatures and/or to provide enhanced chemical resistance.

The KB14 seal is a special spring energised seals primarily intended for dynamic applications where reciprocating or moderate rotating movement is present. The P14 is used in applications where a standard cross section of seal cannot be used or where the seal requires an in-built stand-off ring to avoid crushing under potential back-pressure build up.

It can be used in applications where large gland tolerances exist or where there is a need for higher deflection due to expansion caused by high pressure duty. The seal is commonly used in foundries in place of standard rubber and fabric chevron seals where fluid compatibility is an issue or where extreme high temperature is present.

The seal consists of a U-shaped jacket and 2 cantilever springs which are available in 301 Stainless steel, Hastelloy® C-276 and Elgiloy® as standard. The cantilever spring design offers a moderate load versus deflection which is suitable for most applications. The design of the cantilever spring places the spring load at the front of the sealing lip making the KB14 seal an excellent option should a scraper lip be required for abrasive media sealing or scraping.

The KB19 seal is primarily intended for dynamic applications where reciprocating movement is present but can also be used in static applications where large gland tolerances exist or where there is a need for higher deflection due to expansion caused by high pressure duty. The seal consists of a U-shaped jacket and a cantilever spring both of which can be tailored to suit both high-temperature and conditions where good chemical compatibility is required.

The design of the cantilever spring places the spring load at the front of the sealing lip making the CSE series an excellent option should a scraper lip be required for abrasive media sealing.

It is designed for non-standard groove sizes in repair situations.

KB25 profile is a heavy-duty spring energised seal commonly used in heavy industry such as steel plants as a good replacement for rubber fabric seals that fail due to compatibility issues. The seal requires a 2-piece housing for installation purposes and correct function.

The helical spring energiser within the seal provides the initial pre-load for static sealing while the system pressure enhances the sealing function by further energising the sealing lips. The seal is used in areas where high temperatures can be seen and/or where a seal is required that has broad fluid / media compatibility.

The seal has a useful operating speed and can be manufactured from non-abrasive PTFE materials to protect hardware components from wear and abrasion.

RB21 is our standard solid PTFE Rotary Seal and is commonly referred to us a solid PTFE Lipseal.

RB21 rotary Lipseal is designed to operate in extreme environments where high temperatures, high pressures, aggressive media and a lack of lubrication may exist. It can operate where more standard elastomer seals cannot and where the cost of mechanical seals is not economical. Typically used in pumps, gearboxes and mixers in the food industry. Food contact compliant materials are available.

RB22 rotary Lipseal operates like our standard RB21 seal but includes a metallic support ring as it is designed to operate in extreme environments where high temperatures exist.

Food contact compliant materials are available.

RB23 rotary Lipseal operates like our standard RB21 seal but the sealing lip has been optimized to provide a heavier load for sealing media that may be abrasive or applications that might involve sealing gases.

Food contact compliant materials are available

RB24 rotary Lipseal operates like our RB23 seal but includes a metallic support ring as it is designed to operate in extreme environments where high temperatures exist.

Food contact compliant materials are available.

RB25 rotary Lipseal operates like our RB23 seal but the sealing lip incorporates a garter spring to provide a heavier load for sealing media that may be abrasive or where shaft misalignment may exist

Food contact compliant materials are available

RB26 rotary Lipseal operates like our RB25 seal but includes a metallic support ring as it is designed to operate in extreme environments where high temperatures exist.

Food contact compliant materials are available.

RB27 is our standard solid PTFE Rotary Seal that should be used where low torque values are required and a leak tight seal is not the primary goal. This seal is typically used as an excluder as an environmental seal.

It can operate in extreme environments where a lack of lubrication may exist. It can operate where more standard elastomer seals cannot and where the cost of mechanical seals is not economical.

RB28 rotary Lipseal operates like our standard low torque RB27 seal but includes a metallic support ring as it is designed to operate in extreme environments where high temperatures exist.

Food contact compliant materials are available.

RB29 is the double lipped modification of our standard RB21 seal and is designed to operate in lubricated conditions at higher pressures and speeds. The double lip configuration provides a more positive seal and aids initial lubrication retention.

Typically used in pumps and motors and other high-pressure hydraulic equipment

RB31 is our double acting solid PTFE Rotary lipseal designed to seal pressure from both directions.

This rotary Lipseal is designed to operate in extreme environments where high temperatures, high pressures, aggressive media and a lack of lubrication may exist. It can operate where more standard elastomer seals cannot and where the cost of mechanical seals is not economical.

Typically used in pumps, gearboxes and mixers in the food industry. Food contact compliant materials are available.

RB33 is a modification of our standard RB29 profile and is designed to operate in aggressive conditions.

The double lip configuration provides a more positive seal and aids initial lubrication retention while the spring included in the base prevents unwanted chemical contact with the O-Ring pre-load element.

Typically used in the food industry where clean-in-place (C.I.P.) fluids are present.

Profile SB09 is a compact single acting / uni-directional composite Rod Seal which consists of a either a main PTFE or Hard PU sealing element and an elastomeric O-Ring energiser.

The O-Ring energises the sealing element and provides an effective leak free barrier around the outside diameter of the seal groove.

The special design of the SB09 profile allows trapped fluid pressure to be released back into the system when the piston rod is on its return stroke. Because of this feature this seal can be used in multiples to provide sealing redundancy or in conjunction with our SB17 profile to provide a complete leak free sealing configuration.

By using the combination of a PTFE sealing element and the correct elastomer O-Ring this product can be made suitable for a wide range of situations including low friction, high temperature or where aggressive chemical media is the main system fluid

Profile SB09A is a heavy duty compact single acting / uni-directional composite Rod Seal which consists of a either a main PTFE or Hard PU sealing element and an elastomeric square section energiser.

The energiser provides positive compression onto the sealing element and provides an effective leak free barrier around the outside diameter of the seal groove.

The SB09A is normally used in off-highway applications in machinery such as excavators or in repair situations where the seal groove has now become un-standard.

By using the combination of a PTFE sealing element and the correct elastomeric energiser this product can be made suitable for a wide range of situations including low friction, high temperature or where aggressive chemical media is the main system fluid

Profile SB09B is a compact double acting /bi-directional rod composite seal which consists of a either a main PTFE or Hard PU sealing element and an elastomeric O-Ring energiser.

The O-Ring energises the sealing element and provides an effective leak free barrier around the outside diameter of the seal groove.

The design of the SB09B profile seals fluid pressure from both sides of the seal, which can be useful when used in tandem seal configurations where it may be required to prevent fluids from external environmental sources entering the hydraulic system.

By using the combination of a PTFE sealing element and the correct elastomer O-Ring this product can be made suitable for a wide range of situations including low friction, high temperature or where aggressive chemical media is the main system fluid.

Profile SB09C is a heavy duty compact double acting / bi-directional composite Rod Seal which consists of a either a main PTFE or Hard PU sealing element and an elastomeric square section energiser.

The energiser provides positive compression onto the sealing element and provides an effective leak free barrier around the outside diameter of the seal groove. The design of the SB09B profile seals fluid pressure from both sides of the seal, which can be useful when used in tandem seal configurations where it may be required to prevent fluids from external environmental sources entering the hydraulic system.

By using the combination of a PTFE sealing element and the correct elastomeric energiser this product can be made suitable for a wide range of situations including low friction, high temperature or where aggressive chemical media is the main system fluid

Our SB09D profile is a modification of our standard SB09 seal where the geometry of the dynamic sealing lip on the inside diameter has been altered to help prevent damage to the lips at the point of installation.

It is a compact single acting / uni-directional composite Rod Seal which consists of a either a main PTFE or Hard PU sealing element and an elastomeric O-Ring energiser.

The O-Ring energises the sealing element and provides an effective leak free barrier around the outside diameter of the seal groove.

The special design of the SB09D profile allows fluid film on the stroking piston rod to be returned into the system when on its return stroke. Because of this feature this seal can be used in tandem to provide sealing redundancy or in conjunction with our SB17 profile to provide a complete leak free sealing configuration.

By using the combination of a PTFE sealing element and the correct elastomer O-Ring this product can be made suitable for a wide range of situations including low friction, high temperature or where aggressive chemical media is the main system fluid.

Commonly used as a stem seal on control valves, the SB112A is a multipart Chevron sealing set which can be manufactured from several our high-performance PTFE or modified PTFE compounds. The set comprises of a male pressure ring, several intermediate V-Rings and a female header/support ring. The female header/support ring is normally manufactured using a modified PTFE (typically glass filled) which provides higher extrusion resistance to the seal which in turn increases life expectancy.

The geometry of the SB112A is modified to give exceptional sealing capability in low-pressure applications where standard designs would allow pressure bypass due to the low elasticity of PTFE. Unlike standard chevron sets the use of multiple V-Rings in the set is possible due to the low friction nature of PTFE.

PTFE chevron sealing sets require the permanent use of a spring element to provide the seal with what is commonly referred to as ‘live-loading’ which helps prevent seal deformation under thermal influences. In the case of the SB112A, spring pre-tension of 0.2 N/mm² is suggested although it is understood that greater spring force will improve leakage performance, it may have a negative impact on seal wear.

PTFE packing sets can also be manually adjusted by the engineer using an adjustable gland housing to give a further degree of squeeze/crush on the seal if the set starts to show signs of leakage.

The SB112A-MS is a modification on its sister seal the SB112A and our recommendation for valve stem seals using live-loading.

This new profile has the benefit of having a modified geometry allowing the seal set to include more intermediate chevron V’s within the same groove length. The extra sealing rings within this pack provide increased sealing redundancy, but dot increase the frictional output due to the exceptional properties of PTFE.

Proven in many valve applications and available in a multitude of PTFE materials, contact us to see how the SB112A-MS can work for you.

The STB08 profile is a simple endless / solid back-up ring design, but it is a precision machined component that is used to protect O-Rings and other static and dynamic seals where system pressures are greater than the capabilities of the seal alone or where high temperatures and excessive clearance / extrusion gaps are present.

The STB08 is available to suit all standard O-Ring gland sizes including BS1806, BS4518, AS568, ISO3601, JISB2401, MS27595 and almost any custom size you may require.

This part is available in many of our PTFE, Fluoropolymer, thermoplastic and thermoplastic elastomer materials to suit every application, talk to our technical team to discuss your requirements.

The STB09 profile is an endless / solid back-up ring design that is precision machined and used to protect O-Rings and other dynamic seals where system pressures are greater than the capabilities of the seal alone or where high temperatures and excessive clearance / extrusion gaps are present.

The STB09 is available to suit the following standard O-Ring gland sizes including BS1806, BS4518, AS568, ISO3601 and almost any custom sizes you may require.

This back-up ring is often used in the oil and gas industry where high pressure / high temperature (HPHT) applications exist.

This part is available in many of our PTFE, Fluoropolymer, thermoplastic and thermoplastic elastomer materials to suit every application, talk to our technical team to discuss your requirements.

XB63 is a double acting / bi-directional seal designed for hydraulic and pneumatic dynamic applications and to be installed and operate in standard AS4716 O-Ring and Back-up Ring groove sizes.

The seal provides good low-friction dry running properties and reduces stick-slip in operation while being a compact design, which make it ideal for pneumatic applications.

The XB63 can be supplied in one of our high-performance PTFE materials complete with O-Ring energiser to operate in aggressive high temperature applications.

Profile XB64 is a compact double acting / bi-directional composite piston seal used for media separation.

It consists of a low-friction PTFE sealing element an elastomeric O-Ring energiser and a low-friction elastomeric media separator seal located in the PTFE sealing cap.

The media separator allows the separation of two types of media, a fluid on one side and a gas on the other – situations normally encountered in piston accumulators.

Profile XB64 is a compact double acting / bi-directional composite piston seal used for media separation.

It consists of a low-friction PTFE sealing element, two elastomeric O-Ring energisers and a low-friction elastomeric media separator seal located in the PTFE sealing cap. The media separator allows the separation of two types of media, a fluid on one side and a gas on the other – situations normally encountered in piston accumulators.

The use of two energising O-Rings optimises the sealing contact points and helps to reduce gas permeation through the inside of the groove and O-Ring. Using the combination of a PTFE sealing element and the correct choice of elastomer parts, this product can be made suitable for a wide range of situations including low friction, high temperature or where aggressive chemical media is the main system fluid

The XB65 profile is a modification of our standard XB64 profile. Originally designed for non-standard housing sizes for the hydraulic accumulator repair market but also commonly used in large diameter heavy duty applications where extra sealing force or increased stability in the groove may be required.

The seals energiser is an elastomer profile which prevents seal roll in the groove and provides the seal with added stability and the media separator allows the separation of two types of media, a fluid on one side and a gas on the other – situations normally encountered in piston accumulators.

This double acting piston seal is available in many combinations of our high-performance materials to provide the design engineer or repairer with the optimum solution for their sealing application.