The Trunnion Ball Valve Has Worry-free Sealing

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The trunnion-mounted ball valve is a special type of ball valve. It mainly consists of components such as the valve body, ball, valve stem, trunnions, valve seat and seals. The ball is the key component for controlling the on-off of the fluid. There is a circular through-hole on the ball. When the ball rotates, this through-hole aligns or is perpendicular to the inlet and outlet channels of the valve body, thus realizing the opening and closing of the valve. The valve stem is used to connect the external operating mechanism and the ball, driving the ball to rotate. The trunnions are the parts that support the ball, usually located at the bottom of the ball, and together with the valve stem, ensure the stable rotation of the ball within the valve body.

The trunnion type is a common connection method. It is usually used in mechanical equipment such as hydraulic cylinders. It is connected with other components through the trunnion type, allowing rotation or swinging within a certain range.

You can watch our product video to further understand its features.

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 Product Display

Forged carbon steel ball valve

（A105N）

Forged stainless steel ball valve

（F316）

Cast carbon steel ball valve

（WCB）

• Size: 1/2"~24"(DN15 ~ DN600)

• Pressure: Class 150lb~900lb(PN20 ~ PN150)

• Connection: Fiange、Butt welding、Socket welding

• Material: Carbon steel、Stainless steel、Alloy steel、Special seel

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Sphere Support Method:
The upper part of the sphere is supported by the valve stem, and the lower part is supported by the trunnions, forming a double support structure that makes the sphere more stable during rotation, less affected by fluid pressure, capable of withstanding higher pressures and larger diameters, suitable for high-pressure and large-diameter working conditions.

Sealing Structure:
The valve seat is pushed by the spring built in the valve seat bracket, contacts the ball and seals it. This design can ensure good sealing performance and reduce the possibility of leakage.

Compact Design:
The structure is relatively compact, occupies less space, is convenient for installation and maintenance, and is suitable for various different pipeline systems and equipment layouts.

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 Production Process

Drill a hole

Fitting

Pressure test

Wash

Lacquer

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 Performance

Low Operating Torque:
Due to the reasonable support structure of the sphere, the torque required to operate the valve is small, making the operation easier and more convenient. It reduces the requirements for the operating actuator. A smaller manual operating handle or an electric or pneumatic actuator with a lower power can be equipped, thus reducing costs.

Good Flow Characteristics:
When fully open, the flow path is smooth and the pressure loss is extremely small, enabling large-flow transmission and improving the efficiency of the pipeline system.

Strong Corrosion Resistance:
The valve body and main components are made of various materials, such as stainless steel and carbon steel, which can adapt to different corrosive media and temperature environments. The trunnion design makes the sphere bear a uniform force and has strong impact resistance. It can withstand high-pressure and large-diameter working conditions and has a long service life.

Wide Application Range:
It can be widely used in fluid transmission and control in numerous industries such as petroleum, chemical, power, natural gas, pharmaceuticals, food and beverage. It meets the needs of different industrial fields and provides more flexibility for system design.