Trunnion Ball Valve
A ball valve where the ball is fixed (supported) by upper and lower trunnion shafts, independent of pipeline pressure. Upstream and downstream seat rings are spring-loaded against the ball. Above NPS 4" or Class 600+, trunnion design is preferred because the ball is not displaced by line pressure - giving lower BTO and better seat life.
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What is a Trunnion Ball Valve?
A ball valve where the ball is fixed (supported) by upper and lower trunnion shafts, independent of pipeline pressure. Upstream and downstream seat rings are spring-loaded against the ball. Above NPS 4" or Class 600+, trunnion design is preferred because the ball is not displaced by line pressure - giving lower BTO and better seat life.
What is a Trunnion Ball Valve used for?
Trunnion Ball Valves are used in industrial piping systems for on-off isolation, flow control, or backflow prevention depending on the valve type. They are selected based on the process fluid, operating pressure and temperature, required shutoff class, and pipeline size. Vajra Industrial Solutions supplies Trunnion Ball Valves certified to API 6D, ASME B16.34, and other applicable standards.
How do I select the right Trunnion Ball Valve for my application?
Selecting the correct Trunnion Ball Valve requires specifying: (1) nominal pipe size (NPS/DN), (2) pressure class per ASME B16.34, (3) body and trim material based on fluid compatibility and temperature, (4) end connections (flanged RF/RTJ, butt-weld, socket-weld, or threaded), (5) required certifications (API 6D, ISO 9001, fire-safe API 607). Contact Vajra Industrial Solutions at sales@vajravyuh.com with your specifications for a quote.
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