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Materials of Construction

Valve Body

Valves are available in most metals including:-
- Carbon Steel – ASTM A105N
- Carbon Steel – AISI 4140
- Carbon Steel – ASTM A350 GR LF2
- Stainless Steel – ASTM A182 GR 316
- Duplex Stainless Steel – ASTM A182 GR F51
- 6% Molybdenum Stainless Steel – ASTM A182 GR F44
- Super Duplex Stainless Steel – ASTM A182 GR F55
- Alloy 625
- Alloy 825
- Alloy 400
- Alloy 28
- Titanium

We would consider manufacture in any forged machinable metal.  Please note we do not use barstock material for any pressure containment components.  Materials of wetted components are traceable to original material certification (DIN 50049 3.1b).

Flanged end connections are machined from forged materials only.


Subject to customer specific requirements, we use Duplex stainless steel UNS 31803 balls and spindles as standard for all high pressure valves.  This results in superior reliability and increased valve longevity.  Similarly, Graphoil SPG6 seal rings, specially inhibited to prevent corrosion in stainless steel units, are used in preference to CAF because of its superior performance.  Other materials are available to suit specific operating requirements.

Materials of Construction

Seat Material Rating Graph above




Soft Goods/Seals

Seat materials include PTFE, RPTFE and PEEK. Commonly used materials for  ‘O’ ring seals include: fluorocarbon grades, nitrile grades, perfluoroelastomers etc.  Lipseals are available as an option.

Other soft goods materials can be accomodated in the valve design to suit specific applications.