亚洲av永久无码天堂网小说区_在线观看成人无码AV_久久精品www人人做人人爽_色伊人亚洲综合网站_亚洲精品卡2卡3卡4卡乱码_国产人妻人伦精品无码

The safety valve has great value and significance for safe operation and ensuring safe operation. In order to give play to the actual value and function of the safety valve, it is very important to pay attention to details in the process of use.

Manual valve is a valve operated by handle and handwheel. It is a common valve used in equipment pipeline.Its handle, hand wheel rotation direction clockwise is closed, counterclockwise is open.

Pre-maintenance of new valves before operation is a progressive construction concept to protect valve seat seals from seat damage during installation, welding and commissioning

Big size globe valve switch difficult solution 1, first of all, it is recommended to choose bellows seal stop valve, to avoid the impact of piston valve, packing valve friction resistance, switch more easily...

Big size valves may also be used to supply the auxiliary systems in which the pressure may rise above the system pressure.Big size valves can be divided into swing check valves ...

Big Size valve installation essentials 1. The installation location, height and direction of the inlet and outlet must meet the design requirements, and the connection should be firm and tight.

Big size valve is commonly used to drive the valve, usually called this type of drive device drive device for the valve electric device, the characteristics of the valve electric device are as follows: open and close quickly...

Globe valves are valves in which the shut-off piece (disc) moves along the center line of the seat.According to this movement of the disc, the change of seat vent is proportional to the disc stroke.

For globe valves, not only installation and maintenance, but also operation.What should we pay attention to when operating the globe valve?