Pneumatic butterfly valve is a commonly used valve in various projects. Each pneumatic butterfly valve produced by our Shanghai Zhongmei Valve will undergo pressure test before leaving the factory. Only qualified pneumatic butterfly valves will be ap...
PVC pipe fittings in the production process, caused by the material temperature is too low plasticizing poor, generally known as cold spots, the following is introduced on PVC pipe fittings cold spots eliminate. The elimination of cold spots, cold sp...
