Cast Steel Trunnion Ball Valve

Cast Steel Trunnion Ball Valve

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Product Description

Milestone Trunnion Mounted Cast Steel Trunnion Ball Valve

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The middle flange is connected with bolts. The seal is made of reinforced polytetrafluoroethylene embedded in a stainless steel ring. There is a spring at the back of the steel ring to ensure that the valve seat is close to the ball. Keep it sealed. 

Both the upper and lower valve stems are equipped with PTFE bearings to reduce friction and save effort in operation. 

There is an adjustment piece at the bottom of the small shaft to ensure the joint position between the ball and the sealing ring. 

Full bore: The flow aperture of the valve is consistent with the inner diameter of the pipeline to facilitate pipeline cleaning.

Trunnion Mounted Ball Valve


What are the features of the Cast Steel Trunnion Ball Valve

When the valve is closed, the ball is rotated 90 degrees to block the flow by placing the hole perpendicular to the direction of flow.

 A trunnion design refers to the use of two brackets or trunnions to hold the ball in place to prevent it from moving or shifting laterally. Standard double block sealing performance. 

All pressure-bearing parts adopt fully die-forged structure. 

The flange valve is equipped with a flange and a closing part as one body. High-quality stem gaskets feature low seat ball friction materials and surfaces for reliable sealing and low emissions.


What are the advantages of using a Trunnion Mounted Ball Valve over other types of valves?

Trunnion Mounted Ball Valves offer several advantages over other types of valves, such as:

- They provide excellent tightness and sealing when closed, reducing the risk of leaks or contamination.

- They have low torque requirements and can operate with smaller actuators or levers, saving energy and reducing costs.

- They are easy to maintain and service, as the ball can be removed for inspection or replacement without dismantling the entire valve.

- They can handle high pressures and temperatures, making them suitable for a wide range of applications in different industries.

What materials are Trunnion Mounted Ball Valves made of?

Trunnion Mounted Ball Valves can be made of various materials depending on the requirements of the application, such as:

- Carbon steel: for general use in low to medium pressure and temperature environments.

- Stainless steel: for corrosive or high-temperature fluids that require resistance to rust and oxidation.

- Duplex or super duplex: for harsh or extreme conditions that demand high strength and toughness.

- Special alloys: for specific applications that require resistance to chemicals, abrasion, erosion, or other factors.

How do I choose the right size and pressure rating for a Trunnion Mounted Ball Valve?

Choosing the right size and pressure rating for a Trunnion Mounted Ball Valve depends on several factors, such as the flow rate, the operating pressure and temperature, the fluid properties, and the piping system layout. It is important to consult the manufacturer's specifications and recommendations, as well as any relevant codes or standards that apply to the installation. In general, it is advisable to choose a valve with a larger size than the pipe diameter to allow for proper flow and avoid excessive pressure drops.

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