What is the electromagnetic charge pressure difference valve

Vacuum valve refers to the vacuum system components used to change the direction of air flow, adjust the size of air flow, cut off or connect the pipeline in the vacuum system. Vacuum valve closures are sealed with rubber or metal seals.

When the vacuum valve leaks, the leakage position and reason should be identified first. Generally speaking, there are leakage and external leakage. According to the external structure, the external leakage can be divided into packing leakage, valve cover and valve body leakage, as well as the leakage of sealing surface or fabric materials. The operator should make accurate judgment, and timely deal with the problems that can be solved by themselves, and timely deal with those that cannot be solved by maintenance workers.

The packing gland of vacuum valve should not be pressed too tightly, and the valve stem can rotate sensitively. If the pressure is too tight, the friction force of valve rod will be increased and the operating torque will be increased. During valve operation, it is generally not allowed to replace or add packing under pressure, otherwise, the leakage of medium will cause risk.

When the diameter of the vacuum valve is different from that of the process pipe, the reducing pipe should be used for connection. When the small diameter regulating valve is installed, it can be connected by thread. The flow direction arrow of valve body should be consistent with the flow direction.

The pipeline connected to the valve should be cleaned. Compressed air can be used to blow away iron oxide chips, mud and sand, welding slag and other impurities. These debris, not only easy to scratch the sealing surface of the valve, in which large particles of debris (such as welding slag), but also block the small valve, so that its failure.

electromagnetic charge pressure difference valve

There are many kinds of valves used in vacuum system. Today, the vacuum pump manufacturer will give you a simple understanding of what is the electromagnetic charging pressure difference valve.

The electromagnetic charging pressure difference valve is a special valve installed on the air inlet of mechanical vacuum pump. Its function is to make the valve plate fall down automatically to close the vacuum system when the vacuum pump stops running. The air is filled into the pump cavity through the air filling port of the valve to maintain the vacuum degree of the vacuum system and prevent the return flow of the pump oil of the mechanical vacuum pump from polluting the vacuum system Door.

The principle of electromagnetic charging pressure difference valve is: the power supply of mechanical vacuum pump and solenoid valve coil are connected in the same circuit, while the mechanical vacuum pump is powered on, the electromagnetic force of solenoid pilot valve coil will close the air hole in the valve, and the piston in the valve will push the valve plate open by spring force, and enter into normal working state; when the vacuum pump is suddenly cut off or the power is turned off, the mechanical pump At the same time, the solenoid pilot valve will open the air hole due to power loss. The atmosphere will enter the cylinder to push the piston compression spring, and then push the valve to close the vacuum system. Then, the atmosphere will be filled into the air inlet of the vacuum pump to balance the pressure at the inlet and outlet of the vacuum pump, so as to avoid the backflow of pump oil or other things.

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