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14.3.2 A leak between the valve and the block
A leak between the valve and the block can mostly be fixed by tightening the screws that
attach the valve to the block. If the tightening of the screws does not solve the leakage
problem, follow the procedure below:
1. Disconnect the adsorption dryer from the compressed air system and the electrical
power.
2. Make certain that the adsorption dryer is depressurised. You can check this by
inspecting the pressure indicators at the top of the adsorption dryer. Picture (14.3)
3. Carefully place the adsorption dryer on the side. Picture (14.6)
4. Disconnect the connector on the coil of the leaking electromagnetic control valve.
5. Unscrew the screws that are fixing the control valve to the block. You can remove
only the leaking valve. Picture (14.7)
6. Clean the surface of the block, bottom surface of the valve and the membrane.
7. Lubricate the membrane with a sealing lubricant.
8. Reassemble the valve and install it back on the block by tightening the screws.
9. The components are placed in the following order as: membrane, spring and valve.
If the leak is not fixed by the procedure then the valve needs to be replaced. Contact your
supplier.
(14.5)
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