Trunnion Ball Valves

Types of Trunnion Mounted Ball Valves:

Trunnion mounted ball valves are available in many different configurations. They are highly customizable so you can choose the size, type, and actuator that suits your needs.

Key Features:

Build-up of static electricity due to friction between ball and soft seat material is a fire hazard. A spring-loaded plunger is provided on the stem to ensure electrical continuity and to dissipate any static electricity generated.

• Anti-static

• Blowout-proof Stem

The stem of BRITVAL Trunnion-mounted Ball Valves has an integral shoulder that butts against a matching profile in the body to make it blowout-proof. This feature also enables online replacement of packing rings during an emergency.

• Double Block and Bleed

BRITVAL Valves offers Trunnion-mounted Ball Valves (TMBV) that conform to API 6D. The valve, in closed position, blocks flow from both valve ends when the cavity between the seating surfaces is vented through a bleed connection provided on the body cavity. Inbuilt Double Block & Bleed feature enables on-line affirmation of seat sealing. The seat rings float in the flow-axis against a fixed ball and line pressure forces the spring-loaded seats against the ball to effect sealing.

• Cavity Relief

To prevent damage to valve seats and ball due to over-pressurisation inside cavity, all BRITVAL Trunnion-mounted Ball Valves are provided with automatic cavity pressure relief mechanism. When pressure of entrapped fluid exceeds 1.33 times the rated pressure, the spring-loaded seat gets pushed away from the ball to relieve pressure.

• Fire Safe

BRITVAL Trunnion-mounted Ball Valves are fire-safe by design and meet the requirements of API 6FA, API 607 and ISO 10497.

• Internal Trunnion Holder

BRITVAL Trunnion-mounted Ball Valves are equipped with internal trunnion holders (bearing blocks). This design eliminates a leakage path as well as prevents accidental damage during handling.

PRODUCT RANGE

Material of Construction

Trunnion mounted ball valves have a similar structure as traditional ball valves. The only difference is that trunnion ball valves have additional mechanical anchoring that supports the ball or disk.

In this design, the ball is supported from both ends on the x-axis, so that it stays in place and is easy to control. Here is a look at the different parts of a trunnion-mounted ball valve.

Note: Materials also available in F321, F347, F51, F53, monel, inconel, incolloy and additional materials available upon request. = Used only with bolted body construction.