Pneumatic ball valve is evolved from what kind of valve
Wuxi Xinming automatic control valve industry to introducePneumatic ball valveFrom what kind of valve evolved. Pneumatic ball valve is evolved from the globe valve. It has the same rotation 90 degrees lift action, except that the cock body is a sphere, with a circular through hole or channel through its axis. The ratio of the spherical surface and the channel opening should be such that when the ball rotates 90 degrees, the spherical surface should appear at the inlet and outlet, thus cutting off the flow.
Wuxi Xinming automatic control valve industry to introducePneumatic ball valveFrom what kind of valve evolved.
Pneumatic ball valve is evolved from the globe valve. It has the same rotation 90 degrees lift action, except that the cock body is a sphere, with a circular through hole or channel through its axis. The ratio of the spherical surface and the channel opening should be such that when the ball rotates 90 degrees, the spherical surface should appear at the inlet and outlet, thus cutting off the flow. Pneumatic ball valve using pneumatic actuator, only need to rotate the air source 90 degrees, can be firmly closed a small rotating torque. The valve cavity is completely equal to provide a straight line flow path, the resistance to the medium is very small. Pneumatic ball valves are usually considered a good choice for direct opening and closing, but recent developments have planned ball valves to throttle and control flow. The primary feature of pneumatic ball valve is compact structure, convenient operation and repair, suitable for water, solvent, acid, natural gas and other general operation medium and oxygen, hydrogen peroxide and other harsh operation labor-saving, because the ball is supported by the upper and lower bearings, reducing friction, reducing the import pressure to promote the composition of the huge sealing load of the seal load. Elimination. ball and sealing sheet.
Pneumatic ball valveThe sealing function is firm, the stainless steel valve seat is embedded with PTFE single-sex material sealing ring, and the end of the metal valve seat ensures that the sealing ring has sufficient pre-tightening force and is equipped with a tension spring. The surface of the valve wears during use, and the valve continues to ensure good sealing function during spring operation. Fireproof structure, pneumatic fixed ball valve ball and valve seat is equipped with fireproof sealing ring to prevent PTFE sealing ring from burning due to sudden heat or fire, a large number of leakage and fire, so that the sealing ring burning. At the moment, the valve seat sealing ring in the effect of the spring force quickly pressed to the ball, so that the metal between the formation of a seal, with a certain sealing effect. The fire test meets the requirements of AP16FA and API607 specifications. Active pressure relief function. When the pressure of the stagnant medium in the valve cavity rises abnormally and exceeds the preload of the tension spring, the valve seat retracts from the sphere to complete the effect of active pressure relief. The valve seat pressure is released and then actively reset. Drainage pipe, upper and lower valve body has drainage holes, check whether the valve seat leaks. During the operation, if the valve is fully open or fully closed, the pressure in the core cavity is: it can be directly removed and the filler can be replaced. Discharged the preservation liquid into the core cavity to reduce the pollution of the medium to the valve.
Pneumatic fixed ball valve is used to assist the urgent sealing system planning of the valve seat. If the seal is damaged or cannot be sealed under urgent conditions, use an auxiliary sealing system to seal. The sealing surface can be repaired by injecting the corresponding sealant into the surface for urgent sealing. If the conveying medium is dirty or the particle content is low, it can also be injected with the corresponding detergent or lubricant to clean the sealing surface to protect the sealing surface and ensure a firm seal. Pneumatic fixed ball valve is widely used in food, medicine, petroleum, chemical, natural gas, steel, environmental protection, paper and other pipeline media cut or circulation.
The above is Wuxi Xinming automatic control valve industry to introduce the relevant content.