Operation & Maintenance Manual of A240 NAMUR Solenoid Valves
5. Disassembly of Solenoid Valves
Please consider the safety instructions given on Chapter-3.
5.1. Disconnect the supply voltage line and remove the pneumatic air supply tube
5.2. Disconnect all leads from the solenoid valve
5.3. Release the hexagon socket screws and remove the solenoid valve from the actuator
6. Air Supply Ports
Working pressure of PROVAL A240 Solenoid valves is between 3.0 to 8.0 bar compressed air or non flammable gases.
Please ensure that solenoid valves are feeded with filtered and dry air. Mulfunction, due to dirt inside of the solenoid
valve will not be the covered in warranty conditions.
Air is connected from Port Nr.1 (Main Air Inlet Line) and Ports Nr.3 and Nr.5 are for exhaust and must never be closed and allways to be
kept free for exhaust purposes during operation of solenoid valves.
1/4" Size silencers (Proval A145) can be used to avoid the dirt or dust coming into the solenoid valve or adjustable speed reducer with
silencer (Proval A146) can be used for regulating the speed of actuators to avoid water hammer in the process line because of the very
fast closing of the valves as well as reducing the noise of exhaust air as in A145 Silencers.
7. Operation
Operate the solenoid valves only with filtered (clean) and lubricated or non-lubricated compressed air with a quality level 5 according
to ISO8573-1. Corrosive and explosive gases are not allowed to use in any case. In areas with temperature with below 0
°
C it is highly
necessary to use dried air.
Please allways consider the indicated temperature class of the coil (magnet) which is marked on. The non-electric parts of the valve
will not heat up as the coils.
• Bending or torsion on operator of solenoid valve will cause damage and the valve will not operate properly
• Overpressure on operation will cause damages on the valves
• Avoid contacts with corrosive gases and liquids
8. Maintenance
Check the connections regularly for both electrical and pneumatic supply. In case the valve is not operating check if the air pressure is
in required range. Unless otherwise clearly specified, supplied valves are sized for actuators working in 5.6 bar standard industrial
pressure range. If the coil is not functioning it may be burned and will require to be replaced. If the valve is not operating properly
please remove the coil, and remove the valve from actuator and dismantle it completely, clean from any dirts, check for o-rings on
piston; clean it and re-assemble and test it for proper functioning.
If you require any further assistance please contact your local dealer or the factory at below details.
Before start up please ensure that the correct voltage coils are used. Operate the solenoid valves only with filtered (clean) and
lubricated or non-lubricated compressed air with a quality level 5 according to ISO8573-1. Corrosive and explosive gases are not
allowed to use in any case. In areas with temperature with below 0
°
C it is necessary to use dried air.
In order to avoid any mechanical damage please handle the valves properly. Bending or torsion on
operator of solenoid valves will cause damage and the valve will not operate properly
