HDPE pipe manufacturer Jiangsu Xinhai on the performance of the valve application should pay attention

2024-01-29

Author:

Number of views:


Manufacturer Jiangsu Xinhai Pipe Valve Manufacturing Co., Ltd. on the valve application should pay attention to the performance
 
Opening and closing force and moment
Opening and closing force and opening and closing torque refers to the force or torque that must be applied to open or close the valve. When closing the valve, it is necessary to form a certain sealing specific pressure between the opening and closing parts and the two sealing surfaces of the socket. At the same time, it is also necessary to overcome the friction between the valve stem and the packing, between the thread of the valve stem and the nut, and between the end support of the valve stem and other friction parts. Therefore, a certain closing force and closing torque must be applied. During the opening and closing process of the valve, the required opening and closing force and closing torque change, the comparison value is at the instant of closing or the instant of opening. The design and manufacture of the valve should strive to reduce its closing force and closing moment.
 
Opening and closing speed
The opening and closing speed is expressed by the time required for the valve to complete an opening or closing action. Generally, there are no strict requirements for the opening and closing speed of the valve, but some working conditions have special requirements for the opening and closing speed of the rotor pump. If some require rapid opening or closing to prevent accidents, some need to be closed slowly to prevent water hammer, etc. This should be considered when selecting the valve type.