Basic technical requirements for sanitary quick-installation safety valves

     Sanitary quick-installation safety valves have different performance requirements when used in different working conditions. These performance requirements include service life, high temperature resistance, wear resistance and sealing performance. Of course, the higher the performance, the better, but not all sanitary quick-installation safety valves can meet the high performance requirements, but the basic technical requirements specified must be met. The basic technical requirements are as follows :

    1. The sanitary quick-installation safety valve for steam with a set pressure greater than 3.0Mpa or for air or other gases with a medium temperature greater than 235°C should be able to prevent the discharged medium from directly eroding the spring.

    2. The steam sanitary quick-installation safety valve must have a wrench. When the medium pressure reaches more than 75% of the set pressure, the valve disc can be lifted by the wrench. The wrench should not hinder the movement of the valve.

    3. The safety valve used for toxic or flammable media must adopt a closed safety valve and prevent leakage at the valve cover and protective cover gasket.

    4. In order to prevent the mechanism of adjusting the spring compression from loosening and changing the adjusted pressure at will, it must be equipped with an anti-loosening device and printed.

    5. The valve seat should be fixed on the valve body and should not be loosened. The full lift safety valve should be equipped with a mechanism to limit the opening height.

    6. Even if part of the sanitary quick-installation safety valve is damaged, it should still reach the rated displacement. When the spring is damaged, the valve clack and other parts will not fly out of the valve body.

    7. For safety valves with additional back pressure, a back pressure balance mechanism should be set according to the size and change of the pressure.

    8. For the pilot-operated safety valve, the pilot valve and the main valve should be tested for tightness and opening action respectively, and both should meet the performance requirements specified in the standard. The specific performance requirements for the sanitary quick-installation safety valve will be put forward in the safety valve standard.