In the process of using pneumatic butterfly valve, you can regard the positioner as a regulator, which can play a role in scaling up. From the structural point of view, the adjustment system of the positioner is mainly driven by the gas capacity element and the hysteresis element. Only when the two elements work together, can the positioner produce a certain effect in the pneumatic butterfly valve.

The automatic opening deluge valve device of deluge sprinkler system can adopt any of the following transmission modes: steel rope device with fusible lock. Its working principle is that when the fusible lock is melted off by heat, the transmission valve automatically opens, the transmission pipe drains water, the pipe network depressurizes, and the deluge valve automatically opens, but the effect is not ideal; Water filled or air filled transmission pipe system with closed sprinkler.