Asco 374 Serie Instrucciones De Puesta En Marcha Y Mantenimiento

INSTALLATION AND MAINTENANCE INSTRUCTIONS
3/2 NC, NO and U solenoid valves, direct operated, brass or
stainless steel body, 1/4" or pad mount (port 3: 1/8), series 374
DESCRIPTION
Series 374 valves are available as follows:
- Version with threaded 1/4" connections, 3 ports NC (normally
closed), NO (normally open) and U (universal), brass or
stainless steel body;
- Pad-mount version, NC, brass body, for installation on:
. single or joinable brass subbase, 1/4,
. single aluminium subbase or gang-mounting rail, 1/2.
- Pad-mount version NC (S374), pneumatic interface
ISO 15218 (CNOMO E06.05.80, size 30).
ATEX 94/9/EC versions:
See "Special conditions for safe use".
SPECIAL CONDITIONS FOR SAFE USE
For solenoid operators ATEX 49/9/EC, the instructions for use
given in the specifi c Installation Instructions provided with the
product must be strictly followed.
Pad-mound versions:
- Brass subbases: Assembly of a standard solenoid valve
with IP65 protection or solenoid operators for explosive
atmospheres to ATEX with prefi xes «SCDU», «NK», «PV»,
«EM», «ZN».
INSTALLATION
ASCO Numatics components are intended to be used only
within the technical characteristics as specifi ed on the name-
plate. Damage may occur when liquids solidify above the
specifi ed minimum temperature.
Changes to the equipment are only allowed after consulting
the manufacturer or its representative. Before installation
depressurise the piping system and clean internally.
The equipment may be mounted in any position.
The fl ow direction and pipe connection of valves are indicated
on the body.
The pipe connections have to be in accordance with the size
indicated on the nameplate and fi tted accordingly.
CAUTION:
• Reducing the connections may cause improper operation
or malfunctioning.
• For the protection of the equipment install a strainer or fi lter
suitable for the service involved in the inlet side as close to
the product as possible.
• If tape, paste, spray or a similar lubricant is used when
tightening, avoid particles entering the system.
• Use proper tools and locate wrenches as close as possible
to the connection point.
• To avoid damage to the equipment, DO NOT OVER-
TIGHTEN pipe connections.
• Do not use valve or solenoid as a lever.
• The pipe connections should not apply any force, torque or
strain to the product.
ELECTRICAL CONNECTION
In case of electrical connections, they are only to be made
by trained personnel and have to be in accordance with the
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local regulations and standards.
CAUTION:
• Turn off electrical power supply and de-energise the
electrical circuit and voltage carrying parts before start-
ing work.
• All electrical screw terminals must be properly tightened
according to the standards before putting into service.
• Dependent upon the voltage electrical components must
be provided with an earth connection and satisfy local
regulations and standards.
The equipment can have one of the following electrical
terminals:
• Spade plug connections according to ISO-4400 (when
correctly installed this connection provides lP-65 protec-
tion).
PUTTING INTO SERVICE
Before pressurising the system, fi rst carry-out an electri-
cal test. In case of solenoid valves, energise the coil a
few times and notice a metal click signifying the solenoid
operation.
SERVICE
Most of the solenoid valves are equipped with coils for
continuous duty service. To prevent the possibility of
personal or property damage do not touch the solenoid
which can become hot under normal operation conditions.
If the solenoid valve is easily accessible, the installer must
provide protection preventing accidental contact.
SOUND EMISSION
The emission of sound depends on the application, me-
dium and nature of the equipment used. The exact deter-
mination of the sound level can only be carried out by the
user having the valve installed in his system.
MAINTENANCE
Maintenance of ASCO Numatics products is dependent
on service conditions. Periodic cleaning is recommended,
the timing of which will depend on the media and serv-
ice conditions. During servicing, components should be
examined for excessive wear. A complete set of internal
parts is available as a spare parts kit. If a problem occurs
during installation/maintenance or in case of doubt please
contact ASCO Numatics or authorised representatives.
VALVE DISASSEMBLY
Disassemble in an orderly fashion. Pay careful attention to
exploded views provided for identifi cation of parts.
(No spare parts kit for series S374/CNOMO 30, remove
and replace the solenoid operator if necessary)
1. Remove retaining clip (1) and remove the coil (2).
2. Unscrew the core-tube (4) and remove it from the valve
body (9).
3. Remove the core, core guide and spring unit (5)(6)(7)
as well as the o-ring (8).
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INSTALLATION AND MAINTENANCE INSTRUCTIONS
GB
3/2 NC, NO and U solenoid valves, direct operated, brass or
stainless steel body, 1/4" or pad mount (port 3: 1/8), series 374
4. Manual operator version : remove the retainer (10) to free
the manual operator stem (12) and her o-ring (11)
5. All parts are now accessible for cleaning or replacement.
VALVE REASSEMBLY
Reassemble in reverse order of disassembly paying careful
attention to exploded views provided for identifi cation and
placement of parts.
Make sure the retaining clip is correctly placed on the JMX
coil (see drawing).
NOTE:
1. Lubricate all gaskets/O-rings with high quality silicone
grease.
2. After maintenance, operate the solenoid valve a few times
to be sure of proper operation.
Pad-mount version:
Tighten the 4 fastening screws at the indicated torque "A".
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