SPRING ENERGISED SEALS

 

Spring energised seals, often referred to as lip seals or SE-Seals, were originally developed to replace elastomeric O-rings for service in high pressure applications, particularly when low friction and wide chemical compatibility are needed. SE-Seals have a specific U-shaped seal profile and they are machined from a wide range of polymeric materials, often based on PTFE with special fillers, which can help improve wear, extrusion and permeation resistance. They are energised via a choice of different spring geometries and materials all of which are application dependant and chosen on their merits.
SE-Seals can be used in all types of sealing applications from static to dynamic, both rotary and reciprocating. They are effective from vacuum up to pressures of more than 8,700 psig (600 barg), increasing to beyond 18,850psig (1,300 barg) if anti-extrusion backup rings are also fitted. SE-Seal designs are available for seals to operate at temperatures as low -196°C and as high as 260°C.

The oil and gas industry have made good use of SE-Seals as operating pressures and temperatures have increased beyond the capabilities of elastomeric O-rings in recent years. Many end users prefer the use of PTFE based SE-Seals in high pressure environments where RGD is a potential hazard as the materials used are generally resistant to this phenomenon.

 

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
ESF1
ESF1Pressure Max: 400 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 15 m/s
ESF1 is a symmetrical single acting U-Cup spring energised seal and Is designed for use in dynamic reciprocating and rotary applications. It has three sealing edges to provide sealing redundancy and to provide a lubrication reservoir by trapping installation fluid. The ESF series of seal are the correct choice for …Read More
ESF2
ESF2Pressure Max: 500 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 15 m/s
ESF2 is a modification of our ESF1 spring energised seal that has an extended heel for a wider gland width to provide increased pressure capability and reduce the chances of extrusion failure. It Is designed for use in dynamic reciprocating and rotary applications and has three sealing edges to provide …Read More
ESF3
ESF3Pressure Max: 400 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 15 m/s
ESF3 is a symmetrical single acting U-Cup spring energised seal and Is designed for use in static, dynamic reciprocating and rotary applications involving hardware with large gland tolerances or where misalignment issues are present. The ESF series of seal are the correct choice for friction critical applications due to the …Read More
ESF4
ESF4Pressure Max: 500 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 15 m/s
ESF4 is a modification of our ESF3 spring energised seal that has an extended heel for a wider gland width to provide increased pressure capability and reduce the chances of extrusion failure. ESF4 is a symmetrical single acting U-Cup spring energised seal and Is designed for use in static, dynamic …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
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
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
SB19
SB19Pressure Max: 400 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 15 m/s
The SB19 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
SB21
SB21Pressure Max: 400 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 0.5 m/s
The SB21 seal is the first-choice spring energised seal for static applications and very slow-moving dynamic applications where superior sealing force is the primary requirement over seal friction and seal material wear. The seal consists of a U-shaped jacket and a helical wound corrosion resistant spring which is available in …Read More
SB21A
SB21APressure Max: 400 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 0.5 m/s
The SB21A seal is a single acting external face seal and is the first-choice spring energised seal for static applications and very slow-moving dynamic applications where superior sealing force is the primary requirement over seal friction and seal material wear. The seal consists of a U-shaped jacket and a helical …Read More
SB21B
SB21BPressure Max: 400 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 0.5 m/s
The SB21B seal is a single acting internal face seal and is the first-choice spring energised seal for static applications and very slow-moving dynamic applications where superior sealing force is the primary requirement over seal friction and seal material wear. The seal consists of a U-shaped jacket and a helical …Read More
SB21C
SB21CPressure Max: 400 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 0.5 m/s
The SB21C seal a spring energised seal with an internal scraper lip for very slow-moving dynamic applications where superior sealing force and positive scraping action are the primary requirements over seal friction and seal material wear. The seal consists of a U-shaped jacket and a helical wound corrosion resistant spring …Read More
SB21D
SB21DPressure Max: 400 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 0.5 m/s
The SB21D seal a spring energised seal with an external scraper lip for very slow-moving dynamic applications where superior sealing force and positive scraping action are the primary requirements over seal friction and seal material wear. The seal consists of a U-shaped jacket and a helical wound corrosion resistant spring …Read More
SB21F
SB21FPressure Max: 400 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 0.5 m/s
The SB21F seal is the first-choice spring energised seal for static applications and very slow-moving cryogenic shaft sealing applications where superior sealing force is the primary requirement over seal friction and seal material wear. The external flange is clamped within the hardware to help prevent seal jacket shrinkage at extremely …Read More
SB21G
SB21GPressure Max: 400 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 0.5 m/s
The SB21G seal is the first-choice spring energised seal for static applications and very slow-moving cryogenic piston sealing applications where superior sealing force is the primary requirement over seal friction and seal material wear. The internal flange is clamped within the hardware to help prevent seal jacket shrinkage at extremely …Read More
SB25
SB25Pressure Max: 400 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 1 m/s
SB25 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
USF1
USF1Pressure Max: 400 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 15 m/s
The USF1 seal is primarily intended for dynamic applications where reciprocating or slow rotating movement is present. The seal consists of a U-shaped jacket with radiused sealing faces for good low friction operation and a cantilever U-Shaped spring that offers moderate load versus deflection which is suitable for most applications. …Read More
USF2
USF2Pressure Max: 500 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 15 m/s
USF2 is a modification of our USF1 spring energised seal that has an extended heel for a wider gland width to provide increased pressure capability and reduce the chances of extrusion failure. USF2 seal is primarily intended for dynamic applications where reciprocating or slow rotating movement is present. The seal …Read More
USF3
USF3Pressure Max: 400 bar
Temperature
Min: -200°C Max: 260°C
Speed
Max: 15 m/s
The USF3 seal is primarily intended for dynamic applications where reciprocating or slow rotating movement is present and is designed to operate in AS4716 groove dimensions. The seal consists of a U-shaped jacket with chamfered sealing lips which offer positive fluid sealing. It includes lubrication reservoirs on the contact faces …Read More
USF4
USF4Pressure Max: 500 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 15 m/s
USF4 is a modification of our USF3 spring energised seal that has an extended heel for a wider gland width to provide increased pressure capability and reduce the chances of extrusion failure. The USF4 seal is primarily intended for dynamic applications where reciprocating or slow rotating movement is present and …Read More
VSF1
VSF1Pressure Max: 400 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 15 m/s
VSF1 is a symmetrical single acting U-Cup spring energised seal and Is designed for use in static, dynamic reciprocating and rotary applications involving hardware with large gland tolerances or where misalignment issues are present. The seal consists of a U-shaped jacket with chamfered sealing lips which offer positive fluid sealing. …Read More
VSF2
VSF2Pressure Max: 500 bar
Temperature
Min: -200 °C Max: 260 °C
Speed
Max: 15 m/s
VSF2 is a modification of our VSF1 spring energised seal that has an extended heel for a wider gland width to provide increased pressure capability and reduce the chances of extrusion failure. VSF2 is a symmetrical single acting U-Cup spring energised seal and Is designed for use in static, dynamic …Read More