Trunnion Mounted Ball Valves

Trunnion Mounted Ball Valves are engineered for severe, high-pressure, and large-diameter pipeline service where floating ball designs would generate excessive operating torque. In a Trunnion Mounted Ball Valve, the ball is mechanically anchored at the top and bottom by trunnion plates or bearings, while spring-energized floating seat rings move against the ball under upstream line pressure to establish a reliable, bubble-tight seal.

At Zeron Fastners, we manufacture API 6D compliant Trunnion Mounted Ball Valves in two-piece split-body and three-piece forged steel constructions. Equipped with Double Block and Bleed (DBB) capability, anti-blowout stem design, emergency sealant injection fittings, and fire-safe certified testing to API 607/API 6FA. Available in Carbon Steel (A105/WCB), Low-Temperature Carbon Steel (LF2/LCC), Duplex (F51/2205), Super Duplex (F53/2507), Inconel 625, and Titanium.

Trunnion Mounted Ball Valves Suppliers Manufacturer India

Technical Specifications

Specification Feature Details & Standard Compliance
Design Standards API 6D, ASME B16.34, ISO 14313, BS 5351
Size Range 2" to 48" (DN50 - DN1200)
Pressure Ratings Class 150#, 300#, 600#, 900#, 1500#, 2500# (PN20 to PN420)
Body Construction Two-Piece Cast Split Body, Three-Piece Forged Body (Side Entry / Top Entry)
End Connections Flanged (RF, RTJ) to ASME B16.5 / B16.47, Butt Weld (BW) to ASME B16.25
Seating Types Soft Seated (Devlon, PEEK, PTFE, Nylon) & Metal-to-Metal Hardfaced (Stellite, Tungsten Carbide)
Body Materials ASTM A105, A350 LF2, A216 WCB/WCC, A352 LCC, A182 F316, Duplex F51, Super Duplex F55, Inconel 625
Safety Features Double Block & Bleed (DBB), Cavity Relief, Anti-Static, Blowout-Proof Stem, Fire-Safe (API 607)
Operation Heavy-Duty Worm Gearbox, Pneumatic Scotch Yoke Actuator, Electric Actuator, Hydraulic Actuator
Testing Standard API 6D, API 598, ISO 5208

Trunnion Ball Valve Configurations

Type & Model Key Features & Operating Applications
Side-Entry 3-Piece Forged Trunnion Heavy-wall forged valve body designed for severe offshore drilling manifolds and high-pressure transmission.
Top-Entry Trunnion Ball Valve Allows in-line maintenance and internal trim replacement without removing the valve from the main pipeline.
Metal-Seated Trunnion Valve Features Stellite or Tungsten Carbide coatings for abrasive slurries, high temperatures up to 500°C, and sand service.
Cryogenic Trunnion Ball Valve Extended bonnet column engineered for LNG processing, liquid ethane, and liquid nitrogen duty.

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