The forged steel stop valve must be closed during maintenance to ensure that the grease fills the sealing groove along the sealing ring. If it is open, the sealing grease will fall directly into the flow channel or valve cavity, causing waste. When the valve is greased, the issue of grease injection effect is often ignored. During the grease injection operation, the pressure, grease injection amount, and switch position are all normal. However, in order to ensure the grease injection effect of the valve, it is sometimes necessary to open or close the valve to check the lubrication effect and confirm that the surface of the valve ball or gate plate is evenly lubricated.
Connection forms of forged steel stop valves
Forged steel stop valves
There are three body cover connection design forms
The first is the body cover bolt connection forged steel stop valve, according to this For valves designed in a connection style, the valve body and valve cover are connected with bolts and sealed with a wound gasket, which has the advantage of easy maintenance.
The second type of body cover is welded and connected to the forged steel stop valve. For valves designed according to this connection form, the valve body and the valve cover are fully welded and sealed. The advantage is that there is no external leakage.
The third type is the pressure self-tightening valve cover forged steel stop valve. For valves designed according to this connection form, the valve body and the valve cover are connected with a screw mosquito, and the internal pressure self-sealing ring is sealed. The advantage is that the internal pressure The larger it is, the better its sealing performance. You can choose the valve reasonably according to the actual situation.
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