PTFE SEALS

 

In a world where the demand for natural resources is high, the machinery required to access them is now required to work more efficiently and sometimes at elevated temperatures in environmentally friendly fluids that are not compatible with many elastomers.

Environments like these are where PTFE seals come into their own.

The unique properties of PTFE mean seals can be offered with lower frictional properties, increased chemical and thermal resistance while working at higher speeds and pressures than ever before.

DMR Seals manufactures a vast selection of standard PTFE Seals such as spring energised seals, O-Ring energised composite seals, rotary seals and scraper seals to suit most applications and can provide bespoke engineered solutions for special situations.

Contact us to see how we can help you with your application using our range PTFE seals.

 

PRODUCT ENQUIRY

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IMPORTANT - Please Note: The data shown below are maximum values and operating ranges and cannot be used at the same time.

For example: The maximum operating speed will depend on material type chosen, working pressure, application temperature and clearance gap values.  The temperature range shown is also dependent on choice of material and media to be sealed.

Product Range

ProfileNameOperating RangeSummary
AB25
AB25Temperature Min: -50°C Max: 210°C
Speed
Max: 10 m/s
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 …Read More
AB26
AB26Temperature Min: -50°C Max: 210°C
Speed
Max: 10 m/s
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 …Read More
AB27
AB27Temperature Min: -50°C Max: 210°C
Speed
Max: 10 m/s
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 …Read More
AB31
AB31Temperature Min: -50°C Max: 210°C
Speed
Max: 10 m/s
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 …Read More
FB01
FB01Pressure: Max: --
Temperature
Min: -200°C Max: 200°C
Speed Max:
5 m/s
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.Read More
KB08
KB08Pressure Max: 600 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 10 m/s
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 …Read More
KB08A
KB08APressure Max: 600 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 10 m/s
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 …Read More
KB08B
KB08BPressure Max: 600 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 10 m/s
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 …Read More
KB08C
KB08CPressure Max: 600 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 10 m/s
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 …Read More
KB08E
KB08EPressure Max: 600 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 10 m/s
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 …Read More
KB09A
KB09APressure Max: 400 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 1.5 m/s
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 …Read More
KB14
KB14Pressure Max: 400 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 10 m/s
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 …Read More
KB19
KB19Pressure Max: 400 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 15 m/s
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 …Read More
KB25
KB25Pressure Max: 400 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 1 m/s
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 …Read More
RB09
RB09Pressure Max: 300 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 2 m/s
PTFE composite rotating rod seal, o ring activated. Compact design suitable for small installation spaces where a low friction seal is required. Wide chemical and thermal resistance depending on o ring material selection. Wide range of PTFE compounds.Read More
RB09A
RB09APressure Max: 300 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 0.4 m/s
PTFE composite heavy duty rotating rod seal, square ring activated. Compact design suitable for small installation spaces where a low friction seal is required. Wide chemical and thermal resistance depending on energizer ring material selection.Read More
RB10
RB10Pressure Max: 300 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 2 m/s
PTFE composite rotating piston seal, o ring activated. Compact design suitable for small installation spaces where a low friction seal is required. Wide chemical and thermal resistance depending on o ring material selection. Wide range of PTFE compounds.Read More
RB10A
RB10APressure Max: 300 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 0.4 m/s
PTFE composite heavy duty rotating piston seal, square ring activated. Compact design suitable for small installation spaces where a low friction seal is required. Wide chemical and thermal resistance depending on energizer ring material selection.Read More
RB12
RB12Pressure Max: 300 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 1 m/s
Spring energized PTFE internal face (flange) seal. Provides effective sealing over a wide temperature and pressure range. Suitable for small installation spaces. Supplied as standard in carbon filled PTFE and various grades of metal energizer springs.Read More
RB12A
RB12APressure Max: 300 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 1 m/s
Spring energized PTFE external face (flange) seal. Provides effective sealing over a wide temperature and pressure range. Suitable for small installation spaces. Supplied as standard in carbon filled PTFE and various grades of metal energizer springs.Read More
RB15
RB15Pressure Max: 150 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 2 m/s
Spring energized PTFE rotary seal with O-Ring in outside diameter to prevent spinning in the groove. Seals over a wide temperature and pressure range. Suitable for standard housings when a special application is encountered. Food safe version available for use in food processing applications.Read More
RB19
RB19Pressure Max: 150 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 2 m/s
RB19 is a spring energized PTFE rotary seal with clamping flange. Seal cannot rotate with the housing due to oversize flange thickness between clamping plates. Stainless steel spring ensures sealing at low pressures is achieved. FDA compliant version available.Read More
RB20
RB20Pressure Max: 150 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 2 m/s
Double acting spring energized PTFE rotary seal with O-Ring in outside diameter to prevent spinning in the groove. Seals over a wide temperature and pressure range. Suitable for standard housings when a special application is encountered. Food safe version available for use in food processing applicationsRead More
RB21
RB21Pressure Max: 5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 25 m/s
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 …Read More
RB22
RB22Pressure Max: 5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 25 m/s
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.Read More
RB23
RB23Pressure Max: 5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 25 m/s
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 availableRead More
RB24
RB24Pressure Max: 5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 25 m/s
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.Read More
RB25
RB25Pressure Max: 3 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 7 m/s
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 availableRead More
RB26
RB26Pressure Max: 3 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 7 m/s
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.Read More
RB27
RB27Pressure Max: 1.5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 30 m/s
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 …Read More
RB28
RB28Pressure Max: 1.5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 30 m/s
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.Read More
RB29
RB29Pressure Max: 5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 25 m/s
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.Read More
RB30
RB30Pressure Max: 5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 25 m/s
RB30 is a modification of the RB29 profile that includes O-Ring in the base for improved axial retention.Read More
RB31
RB31Pressure Max: 5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 25 m/s
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 …Read More
RB32
RB32Pressure Max: 5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 25 m/s
RB32 profile operates in the same way as our standard RB21 seal but has the inclusion of a flange on the outside diameter. This flange allows the seal to be clamped between two faces for improved retention.Read More
RB33
RB33Pressure Max: 5 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 25 m/s
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 …Read More
SB09
SB09Pressure Max: 600 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 10 m/s
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 …Read More
SB09A
SB09APressure Max: 600 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 10 m/s
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 …Read More
SB09B
SB09BPressure Max: 600 bar
Temperature Min: -50 °C Max: 210 °C
Speed
Max: 10 m/s
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. …Read More
SB09C
SB09CPressure Max: 600 bar
Temperature Min: -50 °C Max: 210 °C
Speed
Max: 10 m/s
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 …Read More
SB09D
SB09DPressure Max: 600 bar
Temperature Min: -50 °C Max: 210 °C
Speed
Max: 10 m/s
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 …Read More
SB112A
SB112APressure Max: 315 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 1.5 m/s
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 …Read More
SB112A-MS
SB112A-MSPressure Max: 315 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 1.5 m/s
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 …Read More
STB08
STB08Pressure Max: 1000 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 0 m/s
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 …Read More
STB09
STB09Pressure Max: 1000 bar
Temperature Min: -200°C Max: 260°C
Speed Max: --
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 …Read More
XB63
XB63Pressure Max: 350 bar
Temperature
Min: -50°C Max: 210°C
Speed
Max: 15 m/s
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 …Read More
XB64
XB64Pressure Max: 400 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 2 m/s
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 …Read More
XB64A
XB64APressure Max: 500 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 3 m/s
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 …Read More
XB65
XB65Pressure Max: 400 bar
Temperature
Min: -50 °C Max: 210 °C
Speed
Max: 2 m/s
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 …Read More