The instrument valve is a pipeline accessory. It is a device used to change the section of the passage and the flow direction of the medium, and to control the flow of the conveying medium. Specifically, the instrument valve has the following uses:

(1) Connect or cut off the medium in the pipeline. Such as gate valve, globe valve, ball valve, plug valve, diaphragm valve, butterfly valve, etc.

(2) Adjust and control the flow and pressure of the medium in the pipeline. Such as throttle valve, regulating valve, pressure reducing valve, safety valve, etc.

(3) Change the direction of medium flow in the pipeline. Such as distribution valve, three-way cock, three-way or four-way ball valve, etc.

(4) Prevent the medium in the pipeline from flowing back. Such as various check valves and bottom valves of different structures.

(5) Separate the medium. Such as steam traps and air traps of various structures.

(6) Indicate and adjust the liquid level. Such as liquid level indicator, liquid level regulator, etc.

(7) Other special purposes. Such as temperature control valve, overcurrent protection emergency shut-off valve, etc. (According to Minxiang Building Materials Network)