Copper valve

The copper valve is a copper-cast valve, which belongs to industrial parts. It was first developed in China by Ningbo, Zhejiang Province. In the early 1980s, Zhejiang Ningbo took the lead in developing manufacturing processes and changed the history of long-term use of cast iron valves in China. The sand casting process was initially used in the manufacturing process and changed to the forging process in the early 1990s. At the beginning of the 21st century, China has developed into a world copper valve manufacturing center.

Process flow

product design

Mold making

Valve casting, forging

(1) Sand casting: The earliest production mode in the valve field, because the casting type does not have enough pressure, the valve produced by this process is prone to generate sand holes, which leads to a series of problems caused by product leakage.

(2) Hot forging and forging: The body of the forged press will not have trachoma, and the appearance will be more beautiful.

Sandblasting

Metal processing

Accessory assembly

Product pressure test

Packaging and storage

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