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(1) small fluid resistance and ball valve are the least fluid resistance in all valve classes. Even the reducing ball valve has a relatively small fluid resistance.
(2) the thrust bearing reduces the friction torque of the stem, which can make the stem long operation smoothly and flexibly.
(3) the seat sealing performance is good, the sealing ring made of flexible material such as ptfe is easy to seal, and the valve sealing ability of ball valve increases with the increase of medium pressure.
(4) the stem seal is reliable, because the stem only ACTS as if it is transported without the lifting movement, the packing seal of the stem is not easily damaged, and the sealing ability increases with the pressure of the medium.
(5) because of the good self-lubrication of ptfe and other materials, the ball valve has a long service life.
Pneumatic cut-off ball valve is composed of high precision pneumatic actuator and high quality ball valve, which belongs to pneumatic switch ball valve. Pneumatic cut-off ball valve has excellent sealing performance, large circulation capacity, simple structure, long service life and easy to maintain. The actuator of pneumatic cut-off ball valve is characterized by simple structure, compact, excellent performance and large output torque. The pneumatic switch ball valve is also equipped with the travel limit switch, the solenoid valve, the pressure reducing valve and the 0.4-0.7MPa air source to realize the open-close operation, and two pairs of non-source contact signals are sent to indicate the valve's switch. The actuator is divided into two types. The unique advantage of single acting type is that once the power source fails, the pneumatic switch ball valve will automatically be opened or closed in accordance with the requirements of the control system. Pneumatic cutting ball valve is widely used in chemical, petroleum, textile, electricity, food, pharmaceutical, refrigeration, aviation, aerospace, paper and other industries, can not only control gas, liquid and steam steamed medium, can also be applied to control the nature of the sewage and contain fiber.
Actuator no. : GT, SR, ST, AT, AW series single - double acting pneumatic actuators.
Air supply pressure: 0.4 ~ 0.7mpa.
Gas source interface: g1/4 ", g1/8 ", g3/8 ", g1/2"
Ambient temperature: - 30 ~ + 70 ℃
Action form: single acting actuator: air - off (B)- valve position opening (FO); Gas open (K)-- valve position close (FC)
Dual action actuator: air - off (B)- valve position (FL) when the gas is lost; Air opening (K)- valve position maintenance (FL)
Accessories: localizer, solenoid valve, air filter pressure reducer, protection valve, travel switch, valve position transmitter, handwheel mechanism, etc.