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

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.