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Reasons and Solutions of the Intake Valve’s Not Opening

2016-12-21

The intake valve in the screw air compressor is the component to control the air pressure in the air receiver . The common intake valves have two types: rotating disc structure and reciprocating valve plate. They use the disc or the valve plate to open or close the air inlet and control the airflow into the nose.


There are two kinds of control mode: one is the switch. When the pressure of air receiver achieves the high limit value, close the air inlet; When the pressure to a lower limit value, open the air inlet. The other kind is: when the air receiver achieves a certain pressure, the rotating disc will close air inlet slightly under the control of the proportional control valve; when the pressure in the air receive increases further, the air inlet will narrow; when the pressure slightly reduces, the air inlet will increase to keep the pressure in the certain range . When the pressure don’t achieve it ,the disc of the intake valve open completely and the air inlet too.


Under the condition of the operation , why does the intake valve close? And what are the solutions? Let’s discuss it simply!


1.Too much water in the control pipe: maintain the control pipe everyday.


2.The intake valve’s Work goes wrong:  check the cylinder,valve pocket and other components. If necessary, replace it.


3.The intake valve is stuck: check the intake valve,valve pocket or axle. If necessary, replace it.


4.The spring in the intake valve breaks: replace it.


5.The electromagnetic valve breaks down: repair or replace it as required and check the wires before the replace.


6.The shuttle valve damages: maintain or replace.


7.The wire terminal in the electromagnetic valve looses: check and tighten it.


These will cause the intake valve’s failure ,so you should handle carefully during the production operation. The intake valve is normally closed valve, which prevents a large amount of gas enters the nose at the time of the start-up and increases the motor starting current. There is a a intake bypass valve in the intake valve. It prevents the nose forms a high vacuum when the start-up ,which influences the lubricating oil’s  atomization.

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