Proval A240 NAMUR Manual

Operation & Maintenance Manual of A240 NAMUR Solenoid Valves
1. Description
PROVAL A240 NAMUR Type Solenoid valves are designed for use on double and single acting pneumatic valve actuators with
compressed air or non-corrosive and non flammable gases. Please keep this manual for your future reference and maintenance.
2. Areas of Application
PROVAL A240 NAMUR Solenoid valves can be used on Standard industrial applications
as well as in explosive atmospheres with gases or combustable dust of the category 2
Group II according to EN 13463-1 only if suitableexplosion proof coil (magnet) is used.
This manual only refers to valve body and does not cover the coil (magnet). Please refer
to coil (magnet) manufacturers application details. In case of use of explosion proof
coils, due to thickness of coil an extension adaptor plate is required to be used between
the valve and the actuator. Figure-1 : Label of Solenoid Valves
3. Main Parts & Dimensions
In order to avoid any failure, the solenoid valves must be
installed and initiated by skilled persons. Please read carefully
the below instructions and follow up the steps carefully.
• Verify that the valve is correctly chosen for your application
• Please take appropriate measures to avoid accidental activation
and improper external influence
• Consider the manual of the magnet coil manufacturer for the
electrical initiation
• Protect the equipment and cables from any damage
• Avoid static charging or peripheral devices
• Ensure that the equipment will be available for regular cleaning
• Avoid strong bending of air tubes
Coil
Nut
O-Ring
Coil With Connector
Explossion Proof
Coil (magnet)
Functional
Sealing
Valve
Body
1/4"
G/NPT
Main
Air
Inlet
(Port.1)
1/4"
G/NPT
Exhaust
Port
(Port.3)
1/4"
G/NPT
Exhaust
Port
(Port.5)
Manual
Override
All ports must remain open. The solenoid valve will not be able to operate if any unused ports are clsoed.
Use only suitable silencers / speed reducers to avoid dirt coming inside the valve.
During the functioning of the valve the magnet coil is heating-up. In order to avoid burning do not touch
the coils while operating.

Operation & Maintenance Manual of A240 NAMUR Solenoid Valves
4. Assembly of Solenoid Valves
PROVAL A240 NAMUR Type Solenoid valves are 3/2 Way (for single acting actuators) and 5/2 way (for double acting actuators)
convertible design. In order to change the valve from 3/2 way to 5/2 way just turn the functional sealing through 180° and place to
its position.
Please ensure that functional sealing is in correct position.
If functioanl seal is extending
upper side and shows the arrow
3/2, than valve functions as 3/2 way
If functioanl seal is extending
lower side and shows the arrow
5/2, than valve functions as 5/2 way
Front side view of 5/2 Valve
Back side view of 5/2 Valve
Front side view of 3/2 Valve
Back side view of 3/2 Valve
3/2 Way Valve 5/2 Way Valve
Correct Assembly
Way of Functional
Sealing
Wrong Assembly
Way of Functional
Sealing
When the solenoid valves are set for the right
position (function) they can be mount on
any NAMUR interface pneumatic actuators.
The mounting position is user defined but
preferably with an upterned coil (magnet)
position.

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