How to make silencing check valve maintenance and maintenance

Silencing check valve belong to automatic valve class, its role is to prevent the backflow medium pipeline, it is mainly used for medium on the one-way flow of pipeline, only allowed to medium flows in one direction, in order to prevent accidents. Silencing check valve maintenance is as follows: ( 1) Storage transport open-close part should be at the closing device, at the same time, should do the following work: 1) silencing check valve disc should be fixed in the open position. (2) the size at both ends in the mouth with foam board jams, port must use blank cap plugged, dust, rust, keep the passage clean and face smooth; (3) proper packaging protective cylinder parts, shock and the touch; ( 2) Silencing check valve placed should be smooth, pneumatic drive up, shall not be affected by each other. ( 3) For a long time when placed should be check regularly. 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. ( 4) In order to prevent medium counter-current, in equipment, devices and sound check valve should be installed in the pipeline; ( 5) Silencing check valve is generally applicable to clean medium, should not be used in medium containing solid particles and viscosity is bigger; ( 6) Generally on the level of nominal menstruation 50 mm pipe should be choose silencing check valve; ( 7) Silencing check valve should be stored in dry and ventilated room, moisture, rain, rust.