Floating vs Trunnion Ball Valve
Floating ball versus trunnion-mounted ball valves for size, pressure class, and torque. Selection guide from Supreme Valves India.
Quick answer
Larger bore and higher class lines often need trunnion mounting to reduce seat load and operating torque. Confirm size and class on the RFQ.
When to choose each option
Use the RFQ checklist on linked landing pages to lock MOC, class, ends, and listing requirements before commercial evaluation. Wrong material or stem type is a common cause of rework on site.
- Match medium, temperature, and chloride level first.
- Confirm flange standard (ASME Class vs PN) and face type.
- State fire-safe, cryogenic, or listing needs explicitly.
- Send the full BOQ line — size mix drives price and lead time.