The pneumatic cut-off ball valve is equipped with a stroke limit switch, a solenoid valve, a pressure reducing valve and a 0.4-0.7 Mpa air source, which can realize the switching operation and send out two passive contact signals indicating the valve switch. Actuators can be divided into two types: single-acting actuators and double-acting actuators. The unique advantage of single-acting actuators is that in the event of a power failure, the pneumatic shut-off ball valve will automatically open or close according to system requirements. Pneumatic cut-off valve is widely used in chemical, petroleum, textile, electric power, food and pharmaceutical, refrigeration, aviation, aerospace, papermaking and other industries. It can not only control gas, liquid and vapor media, but also can be applied to sewage control.
Characteristics of pneumatic cut-off ball valve
1. The fluid resistance is small, the ball valve is one of the valves with the smallest fluid resistance. Even if the ball valve is reduced, its fluid resistance is very small.
2. Thrust bearing can reduce the friction torque of the valve stem and make the valve stem smooth and flexible.
3. Good valve seat sealing performance. Sealing rings are made of Teflon and other elastic materials for excellent sealing work. In addition, with continued high and medium pressure, the sealing capacity of the ball valve will increase.
4. Reliable valve stem sealing performance. Because the valve stem itself can only perform rotary motion instead of lifting movement, the packing seal of the valve stem is not easy to be damaged, and its sealing performance will be better as the medium pressure increases.
5. Due to the good self-lubricating performance and small friction loss of Teflon and other materials, the pneumatic cut-off ball valve can have a longer service life.