The main function of the intake valve of the screw air compressor is to control the loading and unloading, as well as the size and flow rate of the air pressure. After entering the intake valve, the air flows to the compressor head and is compressed to produce compressed gas.
The working principle of the intake valve is mainly composed of a valve body, a valve, a piston, a cylinder, a spring, a sealing ring, etc. The side of the intake valve is equipped with a control block and a control solenoid valve, which integrates functions such as on-off adjustment, load reduction, noise reduction, pressure reduction, and shutdown venting. During load reduction, a small amount of gas is released through the small hole in the valve to balance the suction air volume of the intake control valve small hole, keeping the pressure in the separation oil tank at 0.2-0.3MPa and maintaining normal air compressor oil circulation. The opening and closing action of the intake control valve is automatically controlled by the pressure sensor and solenoid valve of the regulating system. The flexibility of the opening and closing action of the intake control valve plays an important role in the reliability of the screw air compressor. Simply put, the intake valve of a screw air compressor is: load when powered on, unload when powered off.
What faults may occur in the intake valve during daily work? The intake valve is not unloaded and the intake valve is not closed. Not loading, the intake valve solenoid valve is damaged. Screw machine fuel injection, valve body control block malfunction. The screw machine is overloaded, and the intake valve opens prematurely when starting. So the intake control valve should be regularly inspected to maintain good working condition. During each maintenance, the parts must be removed and the wear of each friction surface checked. Special attention should be paid to inspecting the surface of the rubber sealing ring. If there is any damage or crack, a new part must be replaced. After the repair kit is replaced, all parts should be cleaned thoroughly, and the friction surface of metal parts should be coated with lubricating oil.
It is generally required to replace the intake valve repair kit after 8000 hours, but some users do not maintain it according to the service life cycle in order to reduce costs. It is incorrect to wait until a malfunction occurs before carrying out repairs. My personal suggestion is to replace according to the prescribed time.
