What are the advantages of GT pneumatic actuators

by:Lianke Valve     2022-06-19
Pneumatic actuators are actuators that use air pressure to drive open, close or adjust valves, also known as pneumatic actuators or pneumatic devices, but they are generally called pneumatic heads. Pneumatic actuators are sometimes equipped with certain auxiliary devices. Commonly used are valve positioners and handwheel mechanisms. The function of the valve positioner is to use the feedback principle to improve the performance of the actuator, so that the actuator can achieve accurate positioning according to the control signal of the controller. The function of the handwheel mechanism is to use it to directly control the control valve to maintain normal production when the control system is powered off, gas out, the controller has no output or the actuator fails. Introduction to the advantages of GT pneumatic actuator: 1. Small fluid resistance, ball valve is the smallest fluid resistance among all valves, even the reduced diameter ball valve, its fluid resistance is quite small. 2. The thrust bearing reduces the friction torque of the valve stem, so that the long-term operation of the valve stem can be balanced and flexible. 3. The valve seat has good sealing performance. The sealing ring made of PTFE and other materials is easy to seal in structure, and the sealing capacity of the ball valve increases with the increase of medium pressure. 4. The valve stem has reliable sealing. Since the valve stem only rotates and does not move up and down, the packing seal of the valve stem is not easy to be damaged, and the sealing capacity increases with the increase of the pressure of the medium. 5. Due to the good self-lubricating properties of PTFE and other materials, the friction loss with the ball is small, and the service life of the ball valve is long. 6. The bottom-mounted valve stem and the convex step on the head of the valve stem prevent the valve stem from being ejected. If the valve stem seal is damaged due to fire, metal contact can also be formed between the convex step and the valve body to ensure the valve stem seal. 7. Anti-static function: A spring is set between the ball, the valve stem and the valve body, which can export the static electricity generated during the switching process.
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