Ball Valve Classification Detailed Introduction Of Parts

Ball valves are the most common products in different industries and are often used to cut off the flow of pipeline media. The following is a classification of several commonly used ball valves, and a detailed explanation of ball valve parts


According to the position of the handle and the flat port of the valve stem, it is easy to determine whether the ball of the ball valve is in the closed or open position.
The inverted valve stem can effectively prevent leakage and the valve stem from flying out, which is safe and reliable. The anti-static device is installed to discharge static electricity and prevent electric sparks. The medium temperature ball valve (200～450℃) adopts materials with high compression rate and high resilience rate as compensation for thermal expansion and contraction, so that the valve seat can move freely, and the specific pressure of the sealing pair always meets the sealing requirements.



The mating end face of the valve body adopts a concave-convex static seal to prevent the sealing material from failing due to cold flow and erosion by the medium.
The valve stem is equipped with a locking device, which can be locked in places where operation is not allowed without approval in important positions.
According to user requirements, a fire protection device (floating ball) is installed. If a fire occurs, the valve seat will be burned out, the ball will automatically shift, and the passage will be closed.


Tubular ball valve, a device that guarantees two-way sealing. When abnormal pressure rise occurs in the cavity of the valve body, the spring on the valve seat device is compressed, and the pressure can be automatically relieved to ensure safety. When abnormal pressure rise occurs in the cavity of the valve body, the spring on the valve seat device is compressed, and the pressure can be automatically relieved to ensure safety.
The elastic seat of the metal-sealed ball valve is made of materials with high compression rate and rebound rate to compensate for the expansion and contraction caused by temperature changes. The valve seat adopts a double ring with a unisexual lip seal, with small operating torque and reliable sealing.