Development History:

In the early 1980s, China introduced and absorbed new manufacturing processes to develop copper valves, marking a significant shift from the long-standing use of cast iron valves in the domestic market. Initially, the manufacturing process involved sand casting, but by the early 1990s, it transitioned to forging. By the early 21st century, China had evolved into a global center for copper valve manufacturing.

Manufacturing Process

product design

mold making

Valve casting and forging

(1) Sand Casting: The earliest production method in the valve industry, but it had drawbacks due to the use of casting, resulting in valve products prone to defects such as sand holes that could lead to leaks and other issues.

(2) Hot forging: The valve body formed by forging will not have trachoma, and the appearance will be more beautiful.

Valves have various functions, and their selection should align with their intended purpose. Consider the following factors when choosing the appropriate valve:

According to the selection of working conditions, the technical parameters of commonly used valves include working pressure, maximum allowable working pressure, working temperature (minimum and maximum temperature) and medium (corrosivity, flammability). technical parameters match.

Installation Structure: The installation structure of the valve must match the piping system's structure, which can include threaded connections, flanges, sleeves, welding, and flexible hoses.

Installation method

The valve connected by the pipe thread is connected with the pipe thread of the pipe end, wherein the inner thread can be a cylindrical pipe thread or a conical pipe thread, and the outer thread must be a conical pipe thread.

When connecting valves with internal threads to pipes, control the length of the external thread on the pipe end to prevent excessive threading, which could deform the valve seat and affect the seal.

When installing and tightening the valve connected by pipe thread, the hexagonal or octagonal part of the same end of the thread should be wrenched, and the hexagonal or octagonal part of the other end of the valve should not be wrenched, so as to avoid deformation of the valve.

The flange of the flange connection valve and the flange of the pipe end are not only the same as the specifications and dimensions, but also need the same nominal pressure.

When the valve stem is found to be leaking during the installation and debugging of the globe valve and gate valve, just tighten the compression nut at the packing, and pay attention not to use too much force, as long as there is no water leakage.

After decades of development, many domestic copper valve manufacturing enterprises have broken the conventional thinking and dared to innovate and practice,They have successfully developed a wide range of new products, significantly expanding the application scope of copper valves in engineering applications.In particular, the successful experimental development of the all-copper hydraulic control series not only made a qualitative leap in the manufacturing process of copper valve products, but also greatly promoted the overall competitiveness of the copper valve industry.