TRUNNION MOUNTED BALL VALVE


What is Trunnion Mounted Ball Valve?




The trunnion ball valve is a form of quarter-turn valve which uses a hollow, perforated and fixed/supported ball to control flow through it. The trunnion is available for all sizes and for all pressure classes but they are not suitable for throttling purposes.
Trunnion mounted ball valves, uses a spring mechanism or line pressure assistance to drive the upstream seat against the stationary ball. The surface area exposed to the pressure through the relatively small passageway is actually just the back of the seat.  
Trunnion ball valve is fixed, as it does not move with medium pressure. Trunnion ball valve has floating seats. The seats of this valves move with medium pressure to tight the ball and seal ring to ensure sealing reliability. This is widely used in valves with high pressure and big sizes Trunnion ball valve features the front ball sealing design structure.

How Does it Works?
The trunnion mounted valves stem absorbs the thrust from the line pressure, preventing excess friction between the ball and seats, so even at full rated working pressure operating torque remains low.

Features of a Trunnion Mounted Ball Valve
·         Double Block Sealing Performance.
·         Full Die Forged Structure for all pressure containing parts.
·         Low Operation Torque Design.
·         Anti-blowout Proof Stem Design.

Check this Article About Different Types of Ball Valves

Parts of a Trunnion Mounted Ball Valve



1.    Body
Body of this Valve protects the internals parts and is made up of Carbon steel, Stainless steel, Super Duplex Steel, Inconel and more depending on the Application

2.    Stem
The Stem of this Valves connects the ball to the actuator. This connected joint is welded which controls the movement of the ball. Trunnion Mounted Ball Valve can handle high pressure at high temperature without providing any Damage to the Valve, because of the anti-blowout stems.

3.    Seats
The seats of a trunnion-mounted ball valve surround the ball. When the actuator is turned, the seats hold the ball snugly in place, sealing off any access. Trunnion ball valves have spring-loaded seats that move towards the ball as it is held firmly in place. 

4.    Trunnion
In a trunnion mounted ball valve, there is an additional shaft that holds the ball in place from below. This small shaft is known as a trunnion and it keeps the ball firmly in place. In some ball valves, the trunnion is an extension of the ball while in others it is connected to the ball through welded joints. 

5.    Disk
The disk in a trunnion mounted ball valve is in the shape of a perforated, hollow ball. The ball is connected to the stem on one end and the trunnion on the other. In a trunnion ball valve, the ball or disk is held in place while it rotates. The seats are always in contact with the ball, hence reducing torque. 

6.    Actuator
The actuator in a trunnion ball valve is used to open or close the valve. There are different kinds of actuators used in ball valves depending upon the application and medium.

Get Full Detailed Information About Trunnion Mounted Ball Valve in this Article

About Us
Ridhiman Alloys is India’s most trusted Trunnion Mounted Ball Valves Dealers in India. Ridhiman Alloys have maintained to make a name in Trunnion Mounted Ball Valves Dealers in INDIA. Ridhiman Alloys is an ISO 9001:2008 certified company that has been in existence since 2007. Trunnion Mounted Ball Valves are designed to control and help the flow of gases, liquids or other material.

Our manufactured Trunnion Mounted Ball Valves contain prime quality materials. factory-made from quality grades meeting ASTM and/or AISI standards as a result of higher the standard, higher is that the toughness of the Trunnion Mounted Ball Valves. prime quality of steel content makes a Trunnion Mounted Ball Valves harder and will increase its hardness. Ridhiman Alloys is specialized in Supplier and Dealers of Trunnion Mounted Ball Valves in India. Ridhiman Alloys is an ISO certified Supplier and Dealers in India. Ridhiman Alloys is widely common in India for its prime quality Trunnion Mounted Ball Valves products.


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