1. Shut-off valve
The shut-off valve mainly acts as a switch. Commonly used ball valves, butterfly valves and globe valves, etc., are suitable for the entry and exit of cold and heat sources, equipment, and risers, and can also be used as a vent valve.
2. Check valve
The main function of the check valve is to prevent the backflow of the medium. It uses the kinetic energy of the fluid itself to open clockwise and automatically close when it is reversed. It is often used in water pumps, steam traps and equipment that prohibits fluid backflow.
3. Control valve
Generally, there will be a certain pressure difference before and after the valve, such as ordinary valves, when the opening degree is normal, the flow rate does not change much, but when the opening degree is opened to a certain degree, the flow rate will change rapidly, and the adjustment performance is poor, while the control valve It can automatically change the resistance value in the valve according to the direction or size of the signal to adjust the flow.
4. Globe valve
The stem of the globe valve is vertical to the valve seat. Due to the short switching stroke of the valve stem and the reliable cutting action, this valve is very suitable for cutting or adjusting the medium equipment.