Pneumatic control valve
Thread Content
This is my first time using a pneumatic control valve. Could some experienced engineer please advise me? There is a gauge on the pneumatic control valve that shows pressure, while another gauge shows no pressure; this results in the valve not opening. How can I repair such a pneumatic control valve?
This post was last edited by ylb913 on 2015-11-12 at 10:26. The value in front of the locator represents the instrument air pressure of the system, while the value behind the locator indicates the instrument air pressure output by the locator. Since there is no pressure at the output of the locator, the valve cannot be opened; it seems that this is a valve that operates on air pressure. The problem is with the locator, not with the valve.
First of all, if the instrument air supply doesn’t reach the locator, how can the valve move? Check first that the pressure of the instrument air supply is around 4 kilograms per square inch; verify whether the pressure gauge at the inlet of the locator shows 0.4 MPA or 0 MPA
These two tables show the input and output pressures of the locator; the pressure indicated corresponds to the air supply pressure, while the absence of pressure indicates the locator’s output. If the locator does not provide any output, then the valve naturally cannot be opened. The problem lies either with the locator or with the regulator. Check from back to front: measure the regulator’s output; if there is no output, the problem is with the regulator, whereas if there is an output, the problem is with the locator.