①Before installing the diaphragm valve, carefully check whether the operating conditions of the pipeline conform to the scope of use specified by this valve, and clean the inner cavity to prevent dirt from jamming or damaging the sealing parts.

    　　②Do not apply grease or oil on the surface of the rubber lining and rubber diaphragm to prevent the rubber from swelling and affecting the service life of the diaphragm valve.

    　　③The hand wheel or transmission mechanism is not allowed to be used for lifting, and collision is strictly prohibited.

    　　④ When manually operating the diaphragm valve, do not use auxiliary levers to prevent excessive torque from damaging the drive components or sealing parts.

    　　⑤ Diaphragm valves should be stored in a dry and ventilated room. Stacking is strictly prohibited. Both ends of the stock diaphragm valve must be sealed, and the opening and closing parts should be slightly open.

    　　 Main parts selection method: 　　 There are many parts materials for diaphragm valves, including ferrous metals and non-ferrous metals and their alloys of various brands, various non-metallic materials, etc.  The materials of the diaphragm valve parts should be selected according to the following factors: 　　1, the operating conditions (pressure, temperature and characteristics of the working medium).

    　　2. The force of the part and its function in the diaphragm valve structure.

    　　3. Good manufacturability.

    　　4. If the above conditions are met, there must be a lower cost.

    The material of the valve body, bonnet and disc (disc): the body, bonnet and disc are one of the main parts of the diaphragm valve, which directly bear the pressure of the medium. The materials used must meet the "pressure and temperature grade of the diaphragm valve"  Stipulate