The choice of pneumatic valve flow adjustment

in the throttle opening, medium to flow to the pneumatic valve core to open the direction flow, flow to flow in the direction of closed shut.
to choose mainly single seal type regulating pneumatic valve, a single-seat pneumatic valve, pneumatic valve, single seal sleeve three kinds of pneumatic valve. It for arbitrary flow and flow.
when dg> Usually choose away and when dg acuities were small pneumatic valve, especially high pressure pneumatic valve optional flow closed, in order to improve the life.
to two optional flow pneumatic valve closed switch.