Forged Trunnion Mounted Ball Valve Manufacturers

For a ball valve, the seal is embedded in the stainless steel valve seat, and a spring is provided at the tail end of the metal valve seat. When the sealing surface is worn or burned, the valve seat and the ball are pushed under the action of the spring to form a metal seal. It has a unique automatic pressure relief function. When the medium pressure in the valve exceeds the preload of the spring, the valve seat at the outlet backs away from the ball to achieve automatic pressure relief. The valve seat is automatically reset after pressure relief.

Design Features

• Upstream sealing
• Easy to operate when the valve is open or closed
• The ball is supported by a fixed shaft, which eliminates the excessive torque caused by the huge sealing load caused by the inlet pressure pushing the ball seal seat
• The surface finish of the ball meets the requirements of mirror, and PTFE metal axle sleeve with good self-lubricating property is inset. Even under high operating pressure, the operating torque of the valve will not be too large, which is safe and reliable
• The back of the seat is preloaded by the spring and sealed by the piston principle. The left and right sides of the seat cooperate with the ball to block or flow the media
• Pressure relief valve is installed in the middle chamber of the valve body for exhaust, and a drain plug is provided at the bottom to remove accumulated dirt
• The valve cavity stagnant medium due to temperature rise abnormal pressure boost, the inlet and outlet valve seat from the ball automatic pressure relief