10″ 2500LB Trunnion Ball Valve Manufacturer – API 6D High Pressure Trunnion Mounted Ball Valve

High-pressure applications demand uncompromising quality. This 10-inch, Class 2500LB trunnion-mounted fixed ball valve — fitted with ISO 27509 ring-type joint flanges and driven by a bevel gear operator — is engineered for critical service where leakage is not an option.

Designed and manufactured in accordance with API 6D / ASME B16.34, this valve is built for demanding oil and gas applications including wellhead equipment, pipeline transmission, and high-pressure flow control systems where security and reliability are paramount.

Overall front view — compact, robust, engineered for high-pressure integrity.

Technical Specifications

Why RTJ & ISO 27509?

Ring-Type Joint (RTJ) flanges use a metal ring gasket that compresses into a machined groove, creating a leak-proof metal-to-metal seal. Unlike raised-face (RF) flanges that rely on soft gaskets, RTJ connections maintain their sealing integrity under extreme temperature swings and pressure fluctuations. ISO 27509 ensures global interchangeability with international piping standards.

Close-up of the RTJ flange face — metal-to-metal seal for extreme pressure.

Quality & Testing

Every valve undergoes rigorous inspection and pressure testing before shipment. This order passed hydrostatic shell and seat tests per API 6D requirements, with full material traceability and documented test reports accompanying each unit.

Side profile showing body construction and bevel gear operator mounting.

The trunnion-mounted ball design supports the ball at both top and bottom, reducing operating torque and preventing seat damage under high differential pressure. Combined with the A105N normalized carbon steel body, this valve delivers reliable performance in the most demanding high-pressure environments.

A105N body finish — precision machining and quality surface treatment.

Frequently Asked Questions About Trunnion Ball Valves

What is a trunnion ball valve?

A trunnion ball valve is a type of quarter-turn valve where the ball is supported by a fixed shaft (trunnion) at both the top and bottom. Unlike floating ball valves, the trunnion design absorbs the line pressure through the shaft bearings, reducing operating torque and seat wear. This makes trunnion mounted ball valves ideal for high-pressure and large-diameter applications.

How does a trunnion ball valve work?

When the valve operator turns the stem, the ball rotates within the seats. The trunnion keeps the ball in a fixed position while the seats move against the ball surface, creating a tight seal. This design ensures reliable shut-off even under extreme differential pressure conditions, which is why trunnion ball valves are widely used in oil and gas pipelines, wellhead equipment, and high-pressure flow control systems.

What is the difference between a trunnion ball valve and a floating ball valve?

In a floating ball valve, the ball is only held by the stem and is pushed against the downstream seat by line pressure. In a trunnion ball valve, the ball is mechanically anchored by a trunnion shaft, so line pressure does not push the ball against the seat. This makes trunnion valves better suited for high-pressure, large-bore, and critical service applications where low operating torque and long service life are required.

Why choose Vornet Valve as your trunnion ball valve manufacturer?

As a professional trunnion ball valve manufacturer, Vornet Valve delivers API 6D certified products with full material traceability and documented pressure test reports. We offer custom configurations including RTJ flanges, bevel gear operators, and special materials (A105N, LF2, F316, etc.) across pressure classes from 150LB to 2500LB. Every valve is backed by our commitment to quality and on-time delivery.