Silent check valves belong to the category of automatic valves. Their function is to prevent the medium in the pipeline from flowing back. It is mainly used in the pipeline where the medium flows in one direction, and only allows the medium to flow in one direction to prevent accidents.

The maintenance and maintenance of the muffler check valve are as follows:

1) The opening and closing parts should be in the closing device during storage and transportation, and the following work should be done:

① The flap of the muffler check valve should be fixed in the open position.

②The inner ports at both ends of the diameter are blocked with foam plates, and the ports must be plugged tightly with stuffed caps to prevent dust and rust, keep the passage clean and the end surface flat;

③Appropriate packaging protection, anti-vibration and anti-collision for the cylinder part;

2) The muffler check valve should be placed steadily, with the pneumatic drive device facing upwards, and should not be squeezed by each other.

3) Regular inspections should be made during long-term storage. Every three months, check the dirt and rust on the two channels, the sealing surface, and the protection status of the welded joint. After wiping the dirt and rust, repaint the anti-rust oil for protection.

4) In order to prevent the medium from flowing back, check valves should be installed on the equipment, devices and pipelines;

5) Silencing check valve is generally suitable for clean media, not suitable for media containing solid particles and high viscosity;

6) Generally, vertical muffler check valves should be used on horizontal pipes with a nominal diameter of 50mm;

7) The muffler check valve should be stored in a dry and ventilated room to prevent moisture, rain and rust.