Trunnion Ball Valve
Trunnion Ball Valve Manufacturer
MVS Valves offers high-performance Trunnion Mounted Ball Valves that are designed to deliver superior sealing and reliable operation in high-pressure and large-diameter flow control systems. Built to comply with API 6D standards, these valves are available in both Full Port and Reduced Port designs with Flanged or Butt Weld end connections. The design incorporates key features such as an anti-blowout stem, fire-safe construction, and double block and bleed capability, ensuring optimal safety, minimal leakage, and operational integrity even under extreme pressure and temperature conditions.
To meet the specific requirements of demanding industrial applications, MVS manufactures a wide range of configurations including Cast Steel Full Port Reduced Port Three Piece Trunnion Mounted Ball Valve Flanged Class 300, Class 600, Class 1500, and Class 2500. We also offer Cast Steel Full Port Reduced Port Two Piece Trunnion Mounted Ball Valve Flanged Class 300, Class 600, Class 1500, and Class 2500, tailored to handle various pipeline needs in industries such as oil & gas, petrochemicals, refineries, and power generation.
These trunnion ball valves are engineered with precision to ensure low operating torque, smooth actuation, and long-term durability. They are compatible with manual operation, as well as pneumatic or electric actuators, offering flexible control solutions across different flow media. With robust construction and advanced sealing technology, the MVS Trunnion Ball Valve range provides dependable shutoff and extended service life, even in the most critical flow conditions.
Specification
| Specification | Details |
|---|---|
| Design Standard | API 6D |
| Testing Standard | API 598 / API 6D |
| Face to Face | ASME B16.10 |
| End Connections | ASME B16.5 (Flanged), ASME B16.25 |
| Fire Safe Design | API 607 / API 6FA |
| Size Range | 2″ to 24″ (Larger on Request) |
| Pressure Class | 150# to 2500# |
| Operation | Manual / Gear / Pneumatic / Electric Actuator |
Material of Construction
| Body & Closure | ASTM A105, A350 LF2, A182 F304 / F316, A352 LCB, A216 WCB |
| Ball | ASTM A182 F316 / F304 / F51, ENP Coated, Hardfaced |
| Stem | A182 F6a / F304 / F316 / Monel |
| Seat Insert | PTFE, RTFE, Devlon, Nylon, PEEK, Metal |
| Seals & Gaskets | PTFE, Graphite, Spiral Wound |
| Fasteners | ASTM A193 B7 / B8M, A194 2H / 8M |
Application Industries
Crude Oil & Natural Gas Industry
Chemical & Petrochemical Industry
Water & Wastewater Treatment
Nuclear & Thermal Power Generation
Food & Beverage Industry
Pharmaceutical & Biotechnology
Pulp & Paper Industry
Mining & Mineral Processing
Marine & Shipbuilding
HVAC & Building Services
Automotive & Paint Chemical Manufacturing
Environmental & Bio Gas Renewable Energy
Steel & Metal Processing
Fertilizer Plants, Polymer Production
Cosmetics & Personal Care
Cement & Construction
Chlor-Alkali Industry
Mineral Acids Industry
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Trunnion Ball Valve
Frequently Asked Questions
Can’t find your duty condition here? Send us the media, size, pressure and temperature and we will specify the valve. Contact us
What is a trunnion mounted ball valve and how does it work?
In a trunnion design the ball is anchored on shafts — trunnions — at top and bottom, rather than floating between the seats. Line pressure is carried by the trunnions instead of pushing the ball into the downstream seat, so operating torque stays manageable no matter how large or how highly rated the valve is. Spring-loaded seats press against the ball to seal. This is the standard construction for large diameter and high pressure ball valves.
Which body, ball and seat materials are available?
Body and closure in ASTM A105, A350 LF2, A182 F304/F316, A352 LCB or A216 WCB. Ball in A182 F316, F304, F51, ENP coated or hardfaced. Stem in A182 F6a, F304, F316 or Monel. Seat inserts in PTFE, RTFE, Devlon, nylon, PEEK or metal; seals and gaskets in PTFE, graphite or spiral wound; fasteners ASTM A193 B7/B8M with A194 2H/8M nuts. A350 LF2 and A352 LCB are the low-temperature options.
What size, pressure class and standards apply?
2″ to 24″ with larger sizes on request, in Class 150# to 2500#. Designed to API 6D and tested to API 598 / API 6D, with face-to-face per ASME B16.10 and end connections per ASME B16.5 flanged or ASME B16.25 butt weld. Fire safe design to API 607 / API 6FA is available. Operation is manual, gear, pneumatic or electric.
Trunnion or floating ball — which do I need?
A floating ball valve, such as the two piece or three piece designs, is simpler and cheaper and works well up to moderate sizes and Class 300. Above about 6″, or above Class 300, the force line pressure puts on a floating ball makes it very hard to turn and wears the downstream seat. A trunnion valve removes that load, which is why pipeline and high-pressure service uses it almost exclusively.
Are you a manufacturer, and what are your minimum order quantity and customization options?
MVS is a manufacturer — building valves at its own works since 1978, ISO 9001:2015 certified — and exports across several continents. The minimum order quantity is 20 pieces. Sizes above 24″, fire safe construction, low-temperature materials and gear or actuated assemblies are built to order.