1. According to the selection of control functions, various valves have their own functions, and attention should be paid to their corresponding functions when selecting.

2. According to the selection of working conditions, the technical parameters of commonly used Brass Ball Valve include working scale pressure, maximum allowable working pressure, working temperature (minimum and maximum temperature) and medium (corrosiveness, flammability). When selecting, pay attention to the above-mentioned parameters of working conditions and The technical parameters of the valve are consistent.

3. Choose according to the installation structure. The installation structure of the piping system includes pipe thread, flange, ferrule, welding, hose and so on. Therefore, the installation structure of the valve must be consistent with the installation structure of the pipeline, and the specifications and dimensions must be consistent.

Copper valve installation

1. The valve connected by pipe thread is connected with the pipe thread of the pipe end. The internal thread can be a cylindrical pipe thread or a tapered pipe thread, and the external thread must be a tapered pipe thread.

2. The gate valve with internal thread connection is connected to the pipe end, and the length of the external thread of the pipe end needs to be controlled. In order to prevent the pipe end from being excessively screwed in to press the inner end surface of the thread of the gate valve pipe, the valve seat will be deformed and the sealing performance will be affected.

3. For valves connected with pipe thread, when installing and tightening, wrench should be wrenched at the hexagonal or octagonal part at the same end of the thread, and should not be wrenched at the hexagonal or octagonal part at the other end of the valve to avoid deformation of the valve.

4. Flange connecting the flange of the valve and the flange of the pipe end is not only consistent with the specifications and dimensions, but also with the same nominal pressure.

5. When the valve stem is found to be leaking during the installation and commissioning of the stop valve and gate valve, tighten the compression nut at the packing, and pay attention to not excessive force, as long as there is no leakage.