The valve inspection mainly focuses on the following aspects:
1. Whether there is leakage at the product interface. If there is leakage, continue to tighten the bolts or strengthen the interface sealing plate.
2. Whether the flange is intact and free of cracks. If the flange is found to be cracked or brittle, it shall be replaced in time
3. Whether the spherical deformation is serious. If the sphere is seriously stretched and deformed, a limiting device shall be installed in time to ensure the normal use of the valve.
4. Check the gel aging degree, and replace the aging products in time to avoid danger. As valves can replace other pipeline expansion products widely used in power plants, water plants, sewage plants, chemical and metallurgical industries, our valves have been jointly launched by China Architecture Design Institute, Electric Power Architecture Design Institute, and China Natural Gas&Oil Pipeline Company. The main technical indicators, working pressure, bursting pressure, vacuum degree, applicable temperature and applicable medium (acid and alkali resistant) All reached the corresponding indicators, Designated as "Recommended products, mainly made of neoprene, natural and ternary Yibing, are widely used in water, electricity, chemical industry and ship mooring systems. The structural material of Shanghai Dongfeng Valve is dipped nylon curtain on cloth, with 14-16 layers at 1.0MPa, 16-25 layers at 1.6MPa, and high-strength aging resistant materials on the inside and outside. In order to prevent the product from aging and cracking in long-term use, mesh steel wire is used Multi body protection.