The check valve maintenance and maintenance

1 check valve should be stored in dry and ventilated room, moisture, rain, rust. 2 check storage or transport open-close part should be in closing device, at the same time, should do the following work: a check valve disc should be fixed in position b within the check valve size on both ends of the mouth with foam board jams, port must use blank cap plugged, dust, rust, keep the passage clean and face smooth; Proper packaging protective c cylinder parts, shock and the touch; D check place should be smooth, not by each other. 3 should be regularly check the check valve is placed for a long time. Every three months for two channels, seal surface dirt and rust, welding mouth check the situation of the protection, wipe the dirt and rust, besmear again the rust-proof protection.