Pneumatic Bellow Seal Single Seat Control Valve

Product Information

The upper bonnet of pneumatic bellow seal single seat control valve adopts the bellows seal structure, which can completely eliminate the possibility of the process medium leaking out from the valve stem movement gap, which is one of the remarkable features of the bellows seal valve. Due to the deformability and outstanding aging resistance of the bellows element itself, this kind of regulating valve completely overcomes the weaknesses of packing aging and temperature difference sensitivity that usually exist in packing seal valves.

Secondly, the double sealing structure of bellows and packing is adopted, which has better safety and reliability. Therefore, the pneumatic bellow seal single seat control valve is widely used in the automatic control system of rare and special media such as highly toxic, strong corrosive and radioactive. The regulating valve is equipped with a multi-spring type membrane actuator, which has a compact structure and a large output force.

Leakage: Metal seat: conforms to standard ANSIBl6.104 VI, less than 0.5℅ of rated Cv; PTFE seat: standard conforms to ANSIBl6.104 VI, less than rated Cv 10-7 Return difference: 5℅ (not With locator); 3℅ (with locator) Linear: ±11℅ (without locator); ±3℅ (with locator)

Note: Standard V-type PTFE packing is used.

Body Face To Face Lenth:

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