Water with normal pneumatic valve cannot close is why?

a, water using electromagnetic pneumatic valve installation is correct, for horizontal installation shall not be vertical or inverted installation.
2, pneumatic valve is installed in accordance with pneumatic valve import and export direction arrow.
3, water with solenoid pneumatic valve is used if there is a back pressure pipe outlet.
whether four electromagnetic pneumatic valve, water use, according to the principle of medium to high in low out to install.
five line, whether within the medium containing impurities or particles that pneumatic valve does not close completely.
6, you choose water with solenoid pneumatic valve is normally open or normally closed, normally open to shut down power open, normally closed for electricity power shut down.
water with normal pneumatic valve cannot close summary for the above points, if still cannot solve the problem, need technical personnel to the scene to observe to figure out why. Can ask yongjia ormond control pneumatic valve factory technology department.