Selection Notice and Precautions in public pressure relief valve: according to the size of the diameter of the wind, and then to determine the size of the air bag pressure release valve lever setting value according to the maximum working pressure of the air compressor. Caliber air bag pressure relief valve shall not be less than the diameter of the outlet pressure relief should work for the highest air compressor 1.25 to 1.4 times (set value). Why wind package Relief valve lever do pull test. If you do pull test, the air bag when the pressure exceeds the operating pressure of 1.25-1.4 times the pressure relief valve will not instantly release the pressure, this will cause an explosion of the air bag. All the air bag pressure relief valve lever pull test must be done, so as to ensure a more effective air bag is working properly. The company has the most authoritative and product qualification certificates Rally inspection reports, this product is the company's patented product, patent number: 201030169562.1. The company is the only one in Shanxi Province designated manufacturers, and Shanxi Coal Mine Safety Supervision Bureau issued by the designated certificate. Model: GB specification is QHF-50, QHF-65, QHF-80, QHF-100, QHF-125, QHF-150, QHF-200, QHF-250 according to the air bag's working pressure and pressure relief valve pressure. Working Pressure Wind package Relief valve wind package should work pressure, in accordance with the national standard for all of the air bag pressure relief valve is working pressure should be 8 kg, release pressure must be 1.25-1.4 times the working pressure, which is 10-11.2 kg. Another (many manufacturers say is a patented product, please verify product patent number of customers to buy, so as not to be deceived). The company also can provide customers with a variety of professional custom size, protection air bag pressure relief valve pressure values.