Those you don't know knowledge of pneumatic regulator is cold

Pneumatic control valve is now very widely used a valve device, the various models and can meet the needs of users in each aspect, warm up by all of us. You may know about pneumatic - valve have some, but I have some knowledge of pneumatic control valve of cold here to tell you, oh. In the field of process control, pneumatic control valve is usually used as flow, pressure, temperature and liquid level process such as amount of operating equipment. Pneumatic control valve actuator and valve body of two parts, and various ancillary equipment ( Such as positioner, solenoid valve, booster, speed controller, locking valve, etc. ) Use a combination of a variety of functions is available. Actuators according to the operation signal and drive source disappear when the motion direction and flow characteristic, executive body and body can have a variety of different structures, here only for one representative structure. Pneumatic control valve with pneumatic actuator, electric and electric hydraulic linkage type, pneumatic device is divided into the diaphragm type and cylinder type. According to the operation signal and drive source disappears, actuator is forward, backward, not directional and maintain. Positive signals in operating and driving source disappear when the valve shaft will rise, while the reverse type will decline. Valve pneumatic type than drive type, the valve body according to valve type, diameter size and fluid condition. Angle valves, three-way valve, diaphragm valve, gate valve, butterfly valve, ball valve, eccentric rotary valve, etc. Globe valve is a common type. Pneumatic control signal transmission to the actuator, cylinder or diaphragm type actuator and the valve rod moves up and down. Flow rate characteristics of pneumatic control valve pneumatic control valve flow characteristics are linear, percentage, fast and parabolic four flow characteristic. Installed in the actual control process, the valve differential pressure will change along with the change of flow rate. Which parts of the small flow pipe pressure loss is small, the valve differential pressure get bigger, smaller valve differential pressure and large flow. This is different from the inherent characteristics of the valve features known as the effective flow characteristic. Valve action including positive action 3 ways, reverse action, keep the action. Diaphragm and cylinder is driven by pneumatic type movement way is through the increase in pressure signal, the method of the valve closed, known as 'AIR TO CLOSE'. Inverse movement way is by AIR pressure signal TO increase the method of OPEN valve, also known as the 'AIR TO OPEN' or 'AIRLESS TO CLOSE'. Electrical operation signal can be converted for air pressure signal by the locator. Operation signal termination or interruption of air source and a power outage, please consider the application security and rationality of select valve closed or open.