Machined High Pressure Seals

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Summary

The KB02 profile is an asymmetric single acting / uni-directional hydraulic piston u-cup seal complete with a pressure activated back-up ring to enable use up to 700 bar as standard and higher if required with the correct choice of back-up ring.

The seal has a shortened dynamic lip which provides improved low friction sealing and compression set characteristics in comparison to standard symmetrical u-rings and has an interference fit to ensure a stable fit in the housing and to provide a tight leak free static seal across the inside diameter.

This seal is available in several of M Seals’s high performance materials to provide the designer or repairer with exceptional extrusion resistance, low compression set and outstanding wear properties.

The KB04 profile is a modification of both the KB02 and KB03 profiles. The inclusion of the pressure activated back-up ring offers extrusion resistance and ensures safe use at higher pressures.

The use of the KB04 profile also allows the design engineer to use larger radial clearances where metal to metal contact must be avoided in applications that may have potential side-load/misalignment issues.

The O-Ring energizer offers increased sealing ability in low pressure or soft start systems where standard rod seals would allow low pressure fluid bypass.

Designed for use on one-piece solid pistons the KB09B is a high-pressure modification of our standard KB09 profile.
Like its sister product It is a 4-piece double acting/bi-directional piston seal comprising of a central polyurethane 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 and wrap around the sidewalls of the seal for protection.

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 KB112E chevron packing set has been modified with radiused intermediate chevron rings to improve high-pressure sealing.

The design of this set provides automatic pre-load which means the engineer doesn’t have to make manual adjustments to the seal gland or crush the seal which is common when using older rubber & fabric packing sets.

The intermediate V-ring/s can be stacked on top of each other to provide redundant sealing capability which is useful when the primary seal fails. The choice of too many V-rings though can see the packing set ‘burnout’ through increased friction; we recommend 1 ring only for piston applications and a maximum of 2.

Common materials are PU and POM, but several different materials can be provided to suit most applications – Please talk to our technical department if you need assistance with your application.

KB20 is a compact double acting piston seal designed for both low and high-pressure heavy-duty applications. The seal comprises a T-shaped sealing element with pressure activated non-extrusion rings.

The seal is manufactured with an interference fit on the inside diameter to help prevent seal roll and spiral failure. The seal also has two active anti-extrusion rings to ensure the sealing element is protected from extrusion when hardware clearances are large or pressures are high. The active anti-extrusion rings can be manufactured from several durable materials allowing a superior resistance to extrusion.

The KB20 seal is designed for use across a range of industrial and mobile equipment. It is particularly suited for use in cylinders, accumulators, actuators, valves and other demanding fluid power applications.

The KB20 can be manufactured to suit most internationally recognised O-Ring grooves in both metric and imperial sizes

KB20-ILS profile is a double acting (Bi-Directional) seal commonly referred to as the Interlocking T-Seal and was primarily designed for wellhead applications and downhole tools used within the Oil and Gas industry.

The seal is comprised of an elastomeric sealing element complete with unique locked-in thermoplastic anti-extrusion rings to help it withstand high pressures and large extrusion/clearance gaps between hardware surfaces. It is manufactured with an interference fit on the inside diameter to provide good static sealing and to help prevent seal roll and spiral failure under reciprocating conditions and is the perfect choice for static and/or stab-in (engage/disengage) applications where separate back-up/anti-extrusion rings may normally become sheared or cause galling of mating metallic components at installation point.

The KB20-ILS seal can be used across a range of industrial applications, but it is particularly suited for use in oilfield equipment such as well heads, downhole tools, high pressure pipelines, riser systems, and end-cap seals within piston accumulators.

The KB20A is a single acting / uni-directional seal used for both static and dynamic applications and is designed to be installed into common international sized O-Ring grooves.

Profile KB20A excels in both low and high-pressure applications while also having the ability to operate at both high and low temperatures and in a multitude of different media through the correct choice of material combination.

It provides superior resistance to extrusion through its specially designed active Back-Up rings. Under system pressure the seal flange lifts the Back-Up Rings to block the clearance gap, protecting the sealing bulb at all times.

KB20-EFS is a compact single acting external pressure face seal designed for both low and high-pressure static applications.

The seal comprises a P-shaped sealing element with pressure activated anti-extrusion ring / back-up ring and is manufactured to fit tight against the inside diameter of the seal groove. The seal also has an anti-extrusion ring to ensure the sealing element is protected from extrusion when hardware clearances are large or pressures are high. The anti-extrusion rings can be manufactured from several durable materials allowing a superior resistance to extrusion.

The KB20-IFS can be manufactured to suit most internationally recognised O-Ring grooves in both metric and imperial sizes as well as non-standard sizes.

KB20-IFS is a compact single acting internal pressure face seal designed for both low and high-pressure static applications.

The seal comprises a P-shaped sealing element with pressure activated anti-extrusion ring / back-up ring and is manufactured to fit tight against the outside diameter of the seal groove. The seal also has an anti-extrusion ring to ensure the sealing element is protected from extrusion when hardware clearances are large or pressures are high. The anti-extrusion rings can be manufactured from several durable materials allowing a superior resistance to extrusion.

The KB20-IFS can be manufactured to suit most internationally recognised O-Ring grooves in both metric and imperial sizes as well as non-standard sizes.

Designed for use on one-piece solid pistons the KB23B is a high-pressure modification of our standard KB23 profile.
Like its sister product It is a 4-piece double acting/bi-directional piston seal comprising of a central polyurethane sealing element, elastomeric energising ring and precision machined thermoplastic back-up rings which are split to allow assembly onto the solid piston.

The precision machined back-up rings allow higher working pressures and larger clearance gaps between the hardware components and wrap around the sidewalls of the seal for protection.

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.

The simple O-Ring is one of the oldest and most trusted static sealing methods available.

M Seals can manufacture O-Rings ‘flash-free’ on the outside and inside diameter contact points helping to provide leak-free performance in radial sealing applications.

We manufacture Rubber O-Rings, Polyurethane O-Rings, PTFE O-Rings and O-Rings for rapid gas decompression resistance in one of our Norsok compliant RGD / ED resistant materials.

Our RB14 is a simple square section or rectangular profile used for economical sealing of SAE flanges for both internal and external pressure (confirmation of the pressure direction is required). It provides good low-pressure sealing efficiency up to 100 Bar which can be increased through the correct choice of back-up ring.

While being economical it isn’t the most robust seal for flange sealing, talk to our technical department about the best choice of seal for your application.

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.

The SB02 profile is an asymmetric single acting / uni-directional hydraulic rod u-cup seal complete with a pressure activated back-up ring to enable use up to 700 bar as standard and higher if required with the correct choice of back-up ring.

The seal has a shortened dynamic lip which provides improved low friction sealing and compression set characteristics in comparison to standard symmetrical u-rings.

The SB02 has an interference fit along the outside diameter to ensure a stable fit in the housing and to provide a tight leak free static seal across the outside diameter.

This profile is available in several of M Seals’s high performance materials to provide the designer or repairer with exceptional extrusion resistance, low compression set and outstanding wear properties.

Our SB02C seal profile is normally used as a primary seal in tandem sealing configurations. It’s aim is to act as a buffer to any sudden pressure spikes within the system and protect the secondary seal from any damage this pressure spike could cause.

It is not designed to provide a 100% seal, but to take the initial shock load from the system pressure and protect the seal behind it from damage while allowing enough fluid to bypass and energise the secondary seal.

The seal can normally be retrofitted into composite seal grooves so does not require a lot of space within the gland area. It is available in a variety of materials but is generally supplied in polyurethane.

The SB04 profile is a modification of both our SB02 and SB03 profiles. The inclusion of the pressure activated back-up ring offers extrusion resistance and ensures safe use at higher pressures with the correct choice of back-up ring material. The use of the SB04 profile can also allow the design engineer to use larger radial clearances where metal to metal contact must be avoided.

The O-Ring energizer offers increased sealing ability in low pressure or soft start systems where standard rod seals would allow low pressure fluid bypass.

Standard sealing materials for this profile include Polyurethane and Nitrile rubber, but these can be altered if required to suit the application requirements.

The SB112E chevron packing set has been modified with radiused intermediate chevron rings to improve high-pressure sealing.

The design of this set provides automatic pre-load which means the engineer doesn’t have to make manual adjustments to the seal gland or crush the seal which is common when using older rubber & fabric packing sets.

The radiused intermediate V-rings are stacked on top of each other to provide redundant sealing capability which is useful when the primary seal fails. We recommend 3 sealing rings in rod applications and suggest that the seal be manufactured in one of our high performance internally lubricated Polyurethanes to help prevent stick-slip. The female header ring is normally manufactured from a common engineering plastic or hard grade Polyurethane to provide extrusion resistance and to provide stability in the gland. The force of the system pressure into the primary male pressure ring increases sealing force by ensuring that the V-rings are energised and further activated under pressure.

Common materials are PU and POM, but several different materials can be provided to suit most applications – Please talk to our technical department if you need assistance with your application.

Originally designed for use as a retrofit for standard O-Rings and Back-Ups, the SB20 is an excellent all-round performer and the seal of choice where a compact double acting/bi-directional seal is required for either static or slow-moving applications.

Profile SB20 excels in both low and high-pressure applications while also having the ability to operate at both high and low temperatures and in a multitude of different media through the correct choice of material combination.

It provides superior resistance to extrusion through its specially designed active Back-Up rings. Under system pressure the seal flange lifts the Back-Up Rings to block the clearance gap, protecting the sealing bulb at all times.

A common failure mode of using O-Rings and Back-Up rings in dynamic applications is spiral failure which occurs when the O-Ring rolls or twists in the groove under dynamic movement, this failure mode is completely prevented through choosing the SB20 profile.

SB20-ILS profile is a double acting (Bi-Directional) seal commonly referred to as the Interlocking T-Seal and was primarily designed for wellhead applications and downhole tools used within the Oil and Gas industry.

The seal is comprised of an elastomeric sealing element complete with unique locked-in thermoplastic anti-extrusion rings to help it withstand high pressures and large extrusion/clearance gaps between hardware surfaces. It is manufactured with an interference fit on the outside diameter to provide good static sealing and to help prevent seal roll and spiral failure under reciprocating conditions and is the perfect choice for static and/or stab-in (engage/disengage) applications where separate back-up/anti-extrusion rings may normally become sheared or cause galling of mating metallic components at installation point.

The SB20-ILS seal can be used across a range of industrial applications, but it is particularly suited for use in oilfield equipment such as well heads, downhole tools, high pressure pipelines, riser systems, and end-cap seals within piston accumulators.

The SB20A is a single acting / uni-directional seal used for both static and dynamic applications and is designed to be installed into common international sized O-Ring grooves.

Profile SB20A excels in both low and high-pressure applications while also having the ability to operate at both high and low temperatures and in a multitude of different media through the correct choice of material combination.

It provides superior resistance to extrusion through its specially designed active Back-Up rings. Under system pressure the seal flange lifts the Back-Up Rings to block the clearance gap, protecting the sealing bulb at all times.

Commonly used in heavy duty agricultural, mobile plant and mining hydraulic applications, the SB24 is the first-choice rod seal where harsh operating conditions exist or where extreme pressure spikes exist in hydraulic systems.

The SB24 is a hybrid seal which takes the designs of various seals to provide a complete all-round performer which is capable in almost all situations that may arise in a hydraulic application.

The seal is energised by an O-Ring to provide superior low-pressure leakage performance while offering a secondary lip for redundant sealing. This secondary sealing lip creates a cavity towards the centre of the seal which retains initial installation lubrication, this prevents dry-running and vastly decreases seal wear which in-turn increases seal life. The inclusion of a Back-Up ring allows the seal to work at very high pressures or in applications where the clearance gap needs to be larger than that suggested for standard rod seal designs.

SB24 can be used in tandem with one of our buffer seal designs should this device be required and is available in a vast choice of materials to suit your application requirements.

Commonly used in the mining industry in vertical hydraulic cylinder applications, the SB24A is the first-choice rod seal where harsh operating conditions and/or where extreme pressure spikes exist in hydraulic systems.

The SB24A is a hybrid seal which takes the designs of various seals to provide a complete all-round performer which is capable in almost all situations that may arise in a hydraulic application.

The seal is energised by an O-Ring to provide superior low-pressure leakage performance while offering secondary lipS for redundant sealing. The secondary sealing lips create a cavity towards the centre of the seal which retains initial installation lubrication, this prevents dry-running and vastly decreases seal wear which in-turn increases seal life. The inclusion of a Back-Up ring allows the seal to work at very high pressures or in applications where the clearance gap needs to larger than that suggested for standard rod seal designs.

The secondary sealing lip on the outside diameter prevents bypass through the gland O.D. and is also useful at preventing moisture from entering the system from the non-pressure side, something which is very useful when sealing hydraulic cylinders operating in vertical applications.

SS01 profile is a static O-Ring and Back-up Ring replacement seal. It is used where the installation of 2 back-up rings and an O-Ring are problematic and time consuming. The tapered sealing points allow easier installation into the mating hardware and the dual contact points offer a degree of sealing redundancy. It has excellent resistance to pulsating pressures and does not roll or twist in the groove due its excellent stability.

Commonly used on cartridge valves up to 400 Bar and higher through the correct choice of polyurethane material, it is an economical choice where O-Rings are routinely damaged at the installation stage and a more stable abrasion and tear resistant seal is required.

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.

STB14 profile is a 2-part pressure activated triangular back-up ring that has increased thickness for extreme high-pressure applications.

The profile is designed to be used in conjunction with single acting / uni-directional piston seals which require protection from excessive clearance / extrusion gaps or applications working in high pressure and high temperature applications. This part is commonly used in conjunction with many of our spring energised seals working in HPHT environments.

The ring can be supplied angle split to ease installation and to ensure the ring expands when subjected to system pressure, when this pressure is applied the clearance / extrusion gap is closed by the ring and the sealing element is prevented from flowing into the gap allowing longer trouble free service. However, the ring can be supplied in an endless / solid format when split / two pieces housings are being used and installation of a split ring could be problematic.

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

STB15 profile is a 2-part pressure activated triangular back-up ring that has increased thickness for extreme high-pressure applications.

The profile is designed to be used in conjunction with single acting / uni-directional rod seals which require protection from excessive clearance / extrusion gaps or applications working in high pressure and high temperature applications. This part is commonly used in conjunction with many of our spring energised seals working in HPHT environments.

The ring can be supplied angle split to ease installation and to ensure the ring expands when subjected to system pressure, when this pressure is applied the clearance / extrusion gap is closed by the ring and the sealing element is prevented from flowing into the gap allowing longer trouble free service. However, the ring can be supplied in an endless / solid format when split / two pieces housings are being used and installation of a split ring could be problematic.

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

Profile XB58 is an internal face seal designed to work on SAE flanges and provides high compressive sealing efficiency over the contact faces.

It is commonly supplied in one of our high-performance polyurethane materials but can be manufactured in rubber materials for increased chemical and temperature resistance where required. We can manufacture this seal to suit non-standard sizes and include anti-extrusion devices if the application pressure requires.

Profile XB58 is an external face seal designed to work on SAE flanges and provides high compressive sealing efficiency over the contact faces.

It is commonly supplied in one of our high-performance polyurethane materials but can be manufactured in rubber materials for increased chemical and temperature resistance where required. We can manufacture this seal to suit non-standard sizes and include anti-extrusion devices if the application pressure requires.