Air bag pressure reducing valve

The reason why the airbag pressure is too high is not that the working pressure of the high-pressure fan is too high, but that the pressure in the airbag rises rapidly due to the blockage of the safety valve and the combustion of combustible materials on the inner wall of the airbag. The airbag pressure reducing valve is mainly installed in the airflow direction of the airbag outlet pipeline. The diameter of the pressure reducing valve should not be less than that of the air outlet pipe, and the release pressure should be 1.2- 1.4 times of the highest working pressure of the air compressor. When the airbag pressure exceeds the critical point of the pressure relief valve, the piston of the airbag pressure relief valve will automatically open to achieve the purpose of pressure relief.

● The pressure relief valve consists of cylinder, piston group and protective cover.

● The cylinder is welded by the left and right flanges and the cylinder block.

● In order to enhance wear resistance and prevent rust, the inner surface of the cylinder is plated with hard chromium.

● The piston group consists of a splint, an O-ring, a piston and a pull rod.

● The piston group can be loaded from the left end of the cylinder and fixed in the cylinder with a splint so that it cannot move left and right.

● The protective cover is welded by flange, cylinder and cover.

● When the pressure relief valve releases pressure, the protective cover can prevent the piston from flying out and hurting people, thus playing the role of safety protection.

When the air compressor system works normally, the system pressure is ≤0.785(8kg/cm2), and the pressure relief valve works normally under this pressure.

● When the airbag catches fire due to carbon deposition or the gas in the airbag explodes for some reason, the temperature and pressure in the system will rise instantly.

● When the pressure rises to1.03 0.049 MPa (10.5 0.5 kg/cm2), the pull rod breaks immediately and the pressure relief valve releases pressure.

● Quickly release the high gas in the wind bag and pipeline, relieve the explosion shock wave and avoid accidents. ◆ During normal operation, the pressure of the air compressor system should not exceed 7.84× 105pa(8kg/cm2).

◆ Check the cylinder, piston, flange joint and pipeline of the pressure reducing valve frequently, and there should be no air leakage, and the fasteners should not be loose.

◆ Designated personnel shall be assigned for regular inspection and maintenance.

◆ When the pressure relief valve works normally, check whether the pull rod is thinned and corroded once a month. 1 First of all, you should know the air volume per minute of the high-pressure fan in detail, understand the working pressure of the airbag and the diameter of the airbag outlet, and choose the pressure reducing valve model that suits you according to these specifications.

2. The specification parameters of the pressure reducing valve are as follows: model working pressure (Mpa) release pressure (Mpa) applicable air compressor capacity (m3/min) QHF-50 0.785×105 (8kgf/cm2)1.030.049 (10.5). 1.5qhf-650.785x105 (8kgf/cm2)1.030.049 (10.50.5kgf/cm2) 3qhf-8000.785x/kloc. The main qualifications of the seller include the inspection report of the authoritative department, product patent certificate, etc.

4. Patent Certificate No.201030169562.438+0 for airbag pressure relief valve. See if the seller can provide patent certificates, etc.