Sealing Technology

SEAT MATERIALS

FILLED PTFE
Mixed with an inert filler at the processing stage to give a stiffer material than virgin polymer, this Material gives good chemical resistance and low coefficient of friction.

PCTFE
Capable of higher loads than PTFE. Good low temperature strength, excellent chemical Resistance.

DEVLON V (MONOCAST NYLON)
For services higher than filled PTFE, Devlon V gives good resistance to oils, greases and solvents. Its low water absorption gives superior dimensional stability.

PEEK
This material is an abrasion resistant high performance thermo plastic which retains good tensile and flexural properties at temperatures in excess of plus 250 degrees C.

METAL SEATED
Tungsten or plasma coating provides sealing for extremely high temperatures and abrasive services. The ball and seat retainer sealing face are lapped and paired together before and after coating to ensure a high integrity seal.


O-RINGS AND GASKETS

SEAL MATERIALS

VITON® (FKM)
Shore hardness 90. Excellent resistance to petroleum products and solvents.

NITRILE (NBR)
Shore hardness 90. Good general purpose material.

FLUOROSILICONE
Suitable for low temperature applications.

VITON® AED (FKM/ RGD)
Shore hardness 90. Grades such as FR58-90* and Endura V91J*.

HNBR AED
Shore hardness 90. Grades such as Endura Z95X* and Elastolion 985/101®*.

FFKM
Superior chemical resistance and high temperature performance to most other o-ring grades. Grades such as Kalrez® and Perlast.

ENERGISED LIP SEALS.
Used in more extreme temperature or pressure conditions. Available in a wide range of springs from 316 to Inconel and seal material varying from PTFE to PEEK depending on application.

* O-rings specified as explosive decompression resistant tested, will be in accordance with Norsok M-710 testing specification.

FIRESAFE MATERIAL
Natural Graphite is purified, expanded, and pressed into a typical hexagonal crystalline structure of Graphite which remains permanently flexible. Supplied in moulded ring form it is suitable for temperatures of minus 250 deg C to plus 2500 deg C in non-oxidising atmosphere and up to plus 500 deg C in oxygen. Its features include natural resilience, self lubricating, almost chemically inert, no fillers or binders and no structural change against pressure, temperature or time. Metal Seated valves suitable for high temperature and abrasive service have a full grafoil sealing arrangement.