D1WWTD02E
12
Service Manual
DPC130X
Installation
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Handling precautions
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• A fall or a hit to the control valve could bend the spool and cause an accident due to an operation failure;
• in case the control valve is mounted on a uneven surface, the control valve body might be deformed and cause a malfunction
or external leakage;
• in case foreign matters are present in each port, the control valve operation might fail and cause an accident;
• do not tighten fittings with torque at the higher value than the recommended one, so to avoid strains or damage to the control
valve and serious accidents;
• in case the hoses are not connected to the correspondent ports, unintentional movements might cause a serious accident;
• Walvoil is not responsible for any damage due to an installation procedure not in compliance with our prescriptions;
• in case the control valve has to be painted, make sure that surface paint on the control valve does not exceed the maximum
layer of 0.2 mm -
7.87x10
-3
in
(check if the paint is flammable and in compliance with the potential explosive working atmosphere
of thr control valve);
• in case of the presence of electrohydraulic controls or unloading valve, please cover these electronic parts (as well as the cables)
before painting;
• avoid painting the marking label;
• for the electric parts please refer to the manuals of these certified components attached to the service manual. Pay particular
attention to the wire connection and do not remove any part before reading the specific manual. Do not substitute wire, clamps
and brasscable before reading these attachments. Pay attention to the special conditions for safe use at page 16 of the Thomas
"Ex-relevant Additions to the Performance Specification for Ex-Valves" Manual;
• Walvoil advises to monitor steadily the fluid temperature through a proper sensor (at least SIL2) during the machine running.
In case the fluid temperature exceeds the value shown in the general specifications, the machine must be stopped immediately.
• all the personnel involved in the installation, use, maintenance of this valve, must be instructed with the technical information
about all the operations in order to work safely in ATEX atmosphere;
• any change made on this valve can invalidate the safety requirements. For any doubt, please contact our After-sales Department.
When the control valve is handled, make sure:
• that you do not drop, hit or damage the product;
• that you do not hold the pilot cover or return spring cap of the spool or accessory valves such as main relief valves, anti-shock
relief valves and hydraulic compensators plugs.
WARNING
