Trunnion Ball Valve Manufacturer in India
Speciality Valve is a leading Trunnion Ball Valve Manufacturer in India, offering robust and precision-engineered valves designed for high-pressure, large-diameter, and critical isolation applications. Our trunnion-mounted ball valves deliver bubble-tight sealing, reduced operating torque, and long-term reliability for oil, gas, and process industries.
Function & Working
A trunnion ball valve features a fixed ball supported by bearings at the top and bottom, known as trunnions. This design transfers the line pressure to the trunnion supports, reducing seat load and ensuring low-torque operation. Spring-energized seat rings maintain consistent contact with the ball to achieve tight sealing under all pressure conditions.
Advantages
Smooth, low-torque operation under high pressure
Perfect sealing with Double Block & Bleed (DBB) or Double Isolation & Bleed (DIB) configuration
Fire-safe and antistatic construction
Cavity pressure self-relief for safety
Long service life with minimal maintenance
Types Offered
Manual (Lever / Gear Operated) Trunnion Ball Valve
Pneumatic Actuated Trunnion Ball Valve
Electric Actuated Trunnion Ball Valve
Side-Entry and Top-Entry Configurations
Full Bore and Reduced Bore Designs
Industries Served
Oil & Gas Transmission and Refining
Petrochemical and Chemical Plants
Power Generation
Desalination and Water Distribution
LNG and Cryogenic Facilities
Marine and Offshore Installations
Pipeline and Terminal Applications
Technical Specifications
Design Standards: API 6D, ASME B16.34, ISO 14313, BS 5351
Fire-Safe Design: API 607 / ISO 10497
Fugitive Emission: API 641 / ISO 15848-1 (optional)
Size Range: DN50 – DN1200 (2″ – 48″)
Pressure Ratings: Class 150 – 2500 / PN25 – PN450
End Connections: Flanged (RF / RTJ), Butt-Weld (BW), Hub-End, Fully-Welded Body (for buried service)
Operation: Manual, Pneumatic, or Electric Actuated
Testing: API 598 / ISO 5208 hydrostatic and seat leak testing
Material of Construction
| Component | Material Grades / Standards | Service Application |
|---|---|---|
| Body / Bonnet | ASTM A105, A350 LF2 / LF3 (forged carbon steel), ASTM A216 WCB / WCC, A352 LCB / LCC, A351 CF8 / CF8M / CF3M, A182 F304 / F316 / F316L, Duplex F51, Super Duplex F53 / F55, Inconel 625 / 825, Monel 400 / K500, Hastelloy C276 | High-pressure and corrosive service |
| Ball | SS316 / SS316L, Duplex, Super Duplex, Inconel, Electroless Nickel-Plated or Tungsten Carbide-coated | Abrasive and corrosive environments |
| Stem | 17-4 PH, SS410, SS316, Duplex | High strength and galling resistance |
| Seats | PTFE, RPTFE, Devlon, PEEK, Metal-Seated (Stellite overlay) | Bubble-tight shut-off and durability |
| Seals / Gaskets | Graphite, PTFE, Low-Emission Packing | Fire-safe and leak-proof sealing |
| Bearings / Trunnions | PTFE-lined Stainless Steel / Composite | Reduced friction and extended life |
Key Features
Double Block & Bleed (DBB) / DIB-1, DIB-2 configurations
Fire-safe and antistatic per API 607
Self-relieving cavity design
ISO 5211 actuator mounting pad
NACE MR0175 / ISO 15156 compliance for sour service
Optional drain and vent ports with needle valves
Why Choose Speciality Valve
As a top Trunnion Ball Valve Manufacturer in India, Speciality Valve combines precision forging, advanced machining, and API 6D design compliance to deliver valves capable of withstanding high pressure, corrosive fluids, and severe temperature conditions. Each valve undergoes hydrostatic, pneumatic, and functional testing, ensuring unmatched performance and reliability.
Our valves are certified per EN 10204 3.1, supplied with complete traceability, and available in customized configurations to meet project-specific standards.
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