The commonly used media for valve pressure test include water, oil, air, steam, nitrogen, etc. the pressure test methods for various industrial valves including pneumatic valves are as follows:
The butterfly valve is applicable to the occasions with large diameter (such as DN ＞ 600mm) and short structural length requirements, as well as the occasions requiring flow regulation and quick opening and closing. It is generally used for temperature ≤
This paper mainly introduces the selection methods of various commonly used valves, such as gate valve, stop valve, throttle valve, plug valve, ball valve, diaphragm control valve, etc.
During valve installation, in order to prevent metal, sand and other foreign matters from invading the valve and damaging the sealing surface, it is necessary to set a filter and a flushing valve; In order to maintain compressed air purification, an oil-w
Sealing gasket is a common spare part of equipment.
Did you install the sealing gasket correctly?
If the installation is not correct, the gasket will be damaged during the operation of the equipment, or even dangerous.
Operate correctly. Do not use excessive force to close the valve, and do not open the valve beyond the top dead center. After the valve is fully opened, the handwheel should be reversed a little;
t refers to the valve whose closing part (disc) moves along the center line of the valve seat. According to this movement form of the valve disc, the change of the valve seat opening is in direct proportion to the stroke of the valve disc. Because the ope
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