Ball valves are: floating ball valve, fixed ball valve, ball valve, V ball valve, three ball valve, stainless steel ball valve, cast steel ball valve, forged steel ball valve, ash ball valve, anti-sulfur ball valve, pneumatic ball valve, electric ball valve Ball valve, solder ball valve.
Floating ball valve
Ball of the ball is floating, under the action of the medium pressure, the ball can produce a certain displacement and pressed on the outlet side of the sealing surface to ensure that the export side of the seal. Floating ball valve structure is simple, good sealing, but the ball to bear the working medium of the load all passed to the export seal, so consider the sealing material can withstand the work of the ball media load. This structure is widely used in medium and low pressure ball valves.
2. Fixed ball valve
Ball of the ball is fixed, after the pressure does not produce movement. Fixed ball valve with a floating seat, by the media pressure, the high temperature solenoid valve suppliers seat movement, so that the seal on the ball to ensure that the seal. Usually with the ball on the lower shaft with bearings, operating torque is small, suitable for high pressure and large diameter valves. In order to reduce the operating torque of the ball valve and increase the reliability of the seal, in recent years there have been oil seal ball valve, both in the sealing surface between the injection of special lubricants to form a layer of oil film, which enhances the seal, but also reduces the operating torque , More suitable for high pressure large diameter ball valve.
3. Elastic ball valve
The ball of the ball is elastic. Spherical and direct acting solenoid valves price seat seals are made of metal materials, sealing a lot of pressure, relying on the pressure of the media itself has been less than the requirements of the seal, you must exert external force. This valve is suitable for high temperature and high pressure medium. The elastic sphere is an elastic groove at the lower end of the inner wall of the sphere, and is elastic. When closing the channel, use the wedge of the stem to keep the ball open and seal against the seat. Before turning the ball, loosen the wedge head, and the sphere restores the original shape, so that there is a small gap between the ball and the seat, which can reduce the friction and operating torque of the sealing surface.