Trunnion Mounted Ball Valve

Relia is a trunnion ball valve manufacturer, supplier of trunnion mounted ball valves with reliable sealing performance and best price. The trunnion mounted ball valve Price, Drawing, Dimensions & Catalogue are for your view online.  Relia Trunnion mounted ball valve is designed to API 6D, it is bubble tight shut off with DBB or DIB seats.

In a trunnion mounted ball valve, the ball is supported by the stem and trunnion, reducing the operating torque, while the seats are spring loaded. The ball will not move and the seats move with the medium pressure to tight the ball and seal ring to ensure sealing reliability. Trunnion mounted ball valves are widely used in oil & gas industry.

Product Specifications

Standard Specifications

Trunnion Mounted Ball Valve Drawing

Material Specifications

Trunnion Mounted Ball Valve Dimensions & Weight

Class150 Trunnion Mounted Ball Valve Dimension & Weight

Class 300 Trunnion Mounted Ball Valve Dimension & Weight

Class 600 Trunnion Mounted Ball Valve Dimension & Weight

Class 900 Trunnion Mounted Ball Valve Dimension & Weight

Class 1500 Trunnion Mounted Ball Valve Dimension & Weight

Class 2500 Trunnion Mounted Ball Valve Dimension & Weight

Trunnion Mounted Ball Valve Price List - Feb. 2021

Trunnion Mounted Ball Valve Design Features

Basic Feature:

-2 Piece or 3 Piece body, trunnion mounted ball valve
-Tight shut off sealing mechanism
-Low operation torque
-Fire safe tested
-Blowout-proof ball seat and stem
-Anti-static design
-Locking device for lever and gear operated
-ISO 5211 top mounting pad for actuator

Trunnion Ball Valve Double block and bleed (DBB)

Double Block: When the ball is in the closed position, each seat seals off the process medium independently at the same time between the up/down stream.

Bleed/Self Cavity Relief (Self Relieving Seat): The trunnion mounted ball valve may trap the media in the body cavity when the operator closes the valve. The trapped fluid expands and the pressure increases in the cavity when heated. If the cavity pressure gets 1.33 times of the line pressure, the trapped fluid will push the seat of the downstream side away from the ball by rising pressure against the spring load. When this happens, the pressure gets released.

Trunnion Mounted Ball Valve, Double Block & Bleed.

Typical application: Pipeline ball valves in liquid services, to prevent pressure buildup in body cavity due to change in temperatures.

Secondary Metal to Metal Seat Design

Standard seat design is primary soft seal, and secondary metal to metal seal. Seat insert is designed as pressed-in type which is easy for maintenance. Optional design with primary metal to metal seal and secondary soft seal seat design is also available upon request.

Double Piston Effect Seats-(DPE*DPE) Optional

Double Piston Effect  seats are designed to be pushed against the ball in both cases, whether pressure comes from body cavity or from upstream/ downstream side. Ball valve with DPE seats cannot perform cavity relief. For such reason -in liquid services- the use of a relief valve is recommended.

Typical application: Whenever it is necessary to create an additional safe barrier between the upstream and the downstream sides. Recommended in welded body valves, where seats maintenance is not foreseen.

Combined SPE-DPE (Optional)

Upstream SPE seat ensures self relieving capability, while downstream DPE seat grants the double barrier in case of upstream seat damage. This configuration involves a preferred direction of installation with SPE seat facing upstream. With SPE-DPE configurations, cavity relief always takes place through SPE seat.

Typical application: Riser valves, pig launchers/receivers. DPE seat gives double isolation to the pig trap, allowing automaticrelief of body cavity at the same time in case of pressure build up.

Emergency Sealant Injection System

Each ball valve of size 6” and larger (or smaller size on request), is equipped with sealant injection located at stem and seats area. The injection is integrated with check valve to provide backup sealing, also a check valve is equipped at front of seat sealant injection to avoid blowing out in case wrong operation. When the soft sealing materials (seat inserts and o-rings) are damaged and leakage happened by fire or other accident, the sealant can be injected through the injection fittings.

Blow-out Proof Stem

The stem is made separately from the ball with integral T-type round shoulder, retained by gland.

Anti-static Device

Spring plus graphite type anti-static device are applied between the ball, stem, gland flange and body, to keep the electrical continuity between all the metallic components, and ensure the resistance lower than the most severe service requirement.

Welcome to contact us for trunnion mounted ball valve price,  we will quote you best price within 2 days with technical support.

Why Trunnion Mounted Ball Valve

Trunnion mounted ball valves are quarter-turn valves used to stop or start the flow of a media in a pipe. Trunnion mounted ball valve is TMBV ball valves in short, also called trunnion supported ball valve or trunnion ball valve. In a trunnion mounted ball valve, the ball is supported by the stem and trunnion, reducing the operating torque, while the seats are spring loaded. The ball will not move and the seats move with the medium pressure to tight the ball and seal ring to ensure sealing reliability.

Trunnion mounted ball valves from China trunnion mounted ball valve manufacturers are generally manufactured with the features of double block and bleed (DBB), cavity relief, bi-directional, fire safe and secondary metal to metal seated etc. The DBB design can block both upstream and downstream media. And when the pressure in the middle cavity is greater than the seat spring force, the seat will be pushed open to release the pressure inside the chamber to ensure safety.

As trunnion mounted ball valve manufacturers & suppliers,  Relia supplies trunnion mounted ball valves that are 100% under hydraulic and pneumatic test before leave the factory. The trunnion mounted ball valve price is mainly based on the material specification & construction, Relia trunnion mounted ball valve price is atrractive compared with its performance.