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Five valve parts of the Oil injection air compressor are: Unloatding valve, Min pressure valve, Oil stop valve, Check valve, Thermostatic valve.

Unloading valve

Function:

When the amount of air used changes, the inlet valve through the control system to adjust the opening degree of the valve body to match the amount of air used, it is to control the air compressor gas production and no gas production valve.

Common corresponding faults:

1. The air compressor is not loaded. The fault control panel is displayed (no alarm; Running state 'load'; Low injection pressure or '0'; Head outlet temperature < 70C° can be concluded that the unit is not loaded. The problem is in the unloading valve body, control circuit, loading and unloading solenoid valve and other parts, need to check and eliminate the fault one by one.

2, air compressor does not unload. The fault control panel is displayed (no alarm; Running state 'unloaded'; Oil injection pressure increased > 4; Head outlet temperature > 80℃) can be concluded that the unit does not unload. The problem is in the unloading valve body, control circuit, loading and unloading solenoid valve and other parts, need to check and eliminate the fault one by one.

Air compressor

Minimum pressure valve

Function:

1. The opening pressure of the minimum pressure valve is about 4bar, so as to ensure that the pressure in the oil cylinder is not lower than the minimum pressure in the air output, so as to avoid the reduction of the separation effect of the oil and gas separator due to the excessive air flow rate.

2. A certain pressure is established in the oil cylinder when the machine is started to ensure the lubricating oil circulation and provide the initial control pressure to the control circuit.

3. It has the function of one-way valve to prevent the back flow of compressed air into the machine.