Self-reliance type pneumatic control valve manufacturer which is better?

Self-reliance type pneumatic control valve manufacturer which is better? Self-reliance type pneumatic control valve products are applied very widely, but many manufacturer of products, how to choose suits own factory is a science. From the consideration on the price of knowledge on the one hand, also should be considered from other aspects, such as whether the manufacturer specification, after is guaranteed. What are the function of self-reliance type pneumatic control valve? Self-reliance type pneumatic regulator is the direct effect of direct action type pneumatic control valve is also known as the spring load type pneumatic control valve, its have elastic element structure: such as spring, bellows, bellows type of bulb, etc. , the principle of balance with the elastic force feedback signal. Indirect effect indirectly self-reliance type pneumatic control valve type pneumatic control valve, added a command ( Pilot valve) It play a role of feedback signal amplification and then through the actuator, drive the main valve disc movement to achieve the purpose of the change of valve opening. If be pneumatic pressure regulator, feedback signal is the valve outlet pressure, by introducing actuator signal pipe. If the flow pneumatic control valve, the valve outlet has an orifice ( Or other resistance devices) Introduced by orifice plate ends out differential pressure signal actuators. If the temperature of pneumatic control valve, valve of the export is the temperature sensor ( Temperature or package) Through the temperature sensor in medium heat bilges cold shrink drive actuators. Warm prompt: self-reliance type pneumatic control valve is loved by many industry products, can not buy because of cheap, should be more contrast, can choose to suit their own products. How the products have any questions in the future, can inquire!