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26

2021-01

What are the methods used to connect PPR pipes?

PPR pipe is mainly connected by hot melt connection method. If the operation of hot melt connection is improper, it is to use a better pipe, and the installation quality of the pipeline may not reach the standard. In order to ensure the quality of the connection, first of all, the manufacturer must be equipped with hot melt tools, and the heating temperature and time of the hot welding machine must be carried out in accordance with the regulations.

2021-01-26

15

2021-01

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

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, its larger value is at the instant of closing or the instant of opening.

2021-01-15

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