Products: Trunnion Mounted Ball Valves

Standard Design

Our trunnion ball valve design complies with ANSI,ASME and API standards. We have also incorporated features required by specific end users such as Petrobras, Aramco, BP and Pemex – including ISO 15848-1.2 emissions testing.

We also carry out NDT tests on sample castings per batch to ensure high quality castings for our “right first time” production philosophy.

Product design features

  • Sealing options including additional graphite, O-rings and/or lip seals.
  • Seating options including Devlon, Nylon, PTFE, PEEK, PCTFE and TCC metal seated.
  • Specific paint requirements including NORSOK and features including organic internal coatings.
  • NDT options based on project and criticality of valve.

Production range

  • 1-1/2” to 24”
  • 150lb to 2500lb
  • Full and Reduced bore
  • Manual and Actuated

Material scope

Statoil approved QTR qualified to NORSOK M650 edition IV.

  • Carbon and Low Temperature Carbon Steel
  • Austenitic and Super Austenitic Stainless Steels
  • Duplex and Super Duplex
  • Nickel alloys and Super alloys eg 6Mo,Hastelloy, Inconel and Monel.

All from high quality castings. Other material combinations available against specific requirements.


  • Metal Seated Ball valves with Tungsten Carbide Coating (TCC) on the seat and ball
  • Inconel overlay seat pockets
  • James Walker Seals / KalRez O'Rings
  • Hot Dipped Galvanised Bolting (HDG)

Design features

Design Standards

Two piece or three piece construction valves, meet the following standards: API 6D, API 608, BS EN ISO 17292, EN 12516-1,2, ASME B16.34, B16.5, B16.10, API 607/ISO 10497.

Engineered Seats

Compensate for wear and pressures to prolong sealing life. Seat is thicker and seated deeper in the valve.

Self Relieving Seats

With double block and bleed.

Sealant Injection

Optional sealant injection system.

Stem Design

Stronger stem, meaning a higher MAST value, with no impact on break torques. The stem slot into ball is deeper and slightly curved which gives better control of ball and reduced risk of shearing.

Our stem design incorporates a tamper proof antistatic device and is blowout proof.

Stem Sealing Design

The stem O-ring is located in the body which reduces the friction on the sealing area and so improves performance and provides a long cycle life as demonstrated by our Fugitive Emissions Testing. The stem seal design also features live loaded packing.

Actuation Ready Design

Large ISO plate and plate designs reduces the time and cost of actuation. Uniform torques provide prolonged cyclic life.

Locking Devices

Standard on lever and gear operated valves.


We test to API 6D, API 598/EN 12266-1. Fugitive Emission Testing to ISO-15848-1,2. Fire safe to API 607/EN ISO 10497. All tested in-house.

Project Experience


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