Pneumatic Lining Valves

[Basic Information]       
Principle of operation: Lining valve by the lining of the valve body components and straight stroke pneumatic multi-spring film actuator. Pneumatic actuators have positive and negative forms of action, when the air pressure increases, the putter protruding into the film chamber is called the role of the valve body with the composition of the gas-type; when the gas pressure increases, put into the film chamber Of the reaction, and the valve body with the composition of air open type. How to Operate the Valve-Positioner: When the signal pressure is applied to the membrane chamber, a thrust is generated on the diaphragm, compressing the spring, moving the plunger, driving the valve stem, changing the flow area between the spool and the valve seat until The reaction of the spring and the signal pressure on the diaphragm of the thrust balance, so as to achieve the purpose of automatic adjustment of process parameters. 

[Technical Parameters]

[Valve Features]

1 , Good corrosion resistance: the valve body cavity, spool, seat, are covered with 3mm thick poly perfluoro-ethylene propylene, strong resistance to strong corrosive fluid.

2 , Good sealing performance: the use of polytetrafluoroethylene bellows and packing double seal.

3 , Leakage is small. As the spool, the valve seat with a soft seal to ensure that no leakage.

4 , High precision adjustment: the use of small pneumatic actuators and electric actuators, small size, light weight.

[Adaptation Conditions]
Pneumatic lining fluorine control valve, with the fluid contact with the valve body wall and valve components are used high-pressure injection molding process, lined with corrosion-resistant, anti-aging polyfluoroethylene propylene (F46), but also the use of PTFE Ethylene bellows seal. Widely used in acid, alkali and other corrosive media and toxic, volatile and other gases, liquid control.