Features: flexible action, high reliability, simple installation

Variable spring force design ( instrument wind wind load type ), adapted to different compressor under variable conditions

Take pole position indicator, work stick out a mile

Reliable rod length regulating device, adapt to different mounting dimensions

The hazardous gas leak, with recovery of interface and the inert gas protection interface

Two basic types:

Instrument wind wind load : switch on the instrument air, instrument air force produced by pushing the push rod moves upward, the valve to restore the normal work.

Instrument wind wind unloading : switch on the instrument air, instrument air force produced by pushing the push rod moves upward, valve was forced open, completed unloading.