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Installation and Maintenance Instructions
Series 551-553 solenoid valves, metal-to-metal,
stainless steel body, 1/4", 1/2" thread
DESCRIPTION OF THE APPROVAL
Versions concerned by the approval:
Stainless steel body (series 551, 553), monostable (spring
return) or bistable, 5/2 version isolated from the outside
atmosphere.
- with threaded 1/4 (551) or 1/2 (553) ports -
551, with ¼" threaded connection, max. port depth
11,5 mm (Do not connect the pressure supply to the
exhaust port 3).
- Connect pipes for the required functions in accordance with
this documentation and the port markings on the product.
- Make sure no foreign matter enters the circuit to prevent
blocking the valve function. Restrict the use of sealing tape
or sealing matter to a minimum.
- These valves are intended for use with clean and dry air or
inert gas according to ISO 85731: 2010 (5:1:-). Recommended
minimum fi ltration: 50 microns. The dew point of the fl uid used
must be at least -10°C (18°F) below the minimum temperature
to which the fl uid may be exposed. When using lubricated air,
the lubricant must be compatible with the elastomers used.
Instrument air in compliance with ANSI/ISA standard S7.3
(1975) exceeds the necessary requirements and is, therefore,
an acceptable fl uid for these valves.
All exhaust ports of the valves and pilots must be
!
protected with the stainless steel exhaust protectors.
Connect these exhaust protectors to ports 3 – 5 (5/2) of
the valves. When used outside, or stored for longer peri-
ods of time, and/or where exposed to harsh environments
(dusts, liquids etc.), exhaust protectors must be used. The
reliability of the valve cannot be guaranteed if an exhaust
protection other than that supplied is used.
- Allowable temperature range: -60°C to +60°C
- Max. operating pressure range: 2,5 to 10,4 bar
GENERAL DESCRIPTION
Versions isolated from atmosphere: The internal parts of
the valve are isolated from the outside atmosphere in order to
provide protection in aggressive environments. All the exhaust
ports of the spool valve are pipable, providing better environ-
mental protection, particularly recommended for sensitive areas
such as clean rooms and applications in the pharmaceutical or
food processing industries. It is necessary to connect pipes or
fi ttings to the exhaust ports to protect the internal parts of the
spool valve if used outside or in harsh environments (dusts,
liquids etc.).
SPECIAL CONDITIONS FOR SAFE USE
The valve must be connected to ground (see "Assembly").
The maximum temperature of the fl uid must not exceed the
ambient temperature.
In case of prolonged storage before use, the valve must remain
in the original packaging. The protective elements of the
connection ports and the magnetic heads must remain in place.
Storage conditions: protected from exposure to weather;
storage temperature: -60 C to +70°C ; relative humidity: 95 %.
After storage at low temperature, the valves must be gradually
restored to ambient operating temperature before the fi rst
pressurization.
The spool valves are intended to be operated within the technical
characteristics specifi ed on the nameplate. Changes to the
products may only be made after consulting the manufacturer or
his representative. These solenoid spool valves are designed to
operate with fi ltered air or neutral gas. Do not exceed the maximum
allowable pressure of the valve = 10,4 bar. Caution: observe the
minimum pilot pressure of 2,5 bar. Installation and maintenance
5/2
of the valve must be carried out by qualifi ed personnel only.
Compliance with the Essential Health and Safety Requirements
has been assured by compliance with the European Standard
EN 13463-1.
When assembling this product to a ATEX pilot, take the least
favourable category,maximum working pressure and tem-
perature into account. Compliance with the Essential Health
and Safety Requirements has been assured by compliance with
the European Standards EN 13463-1.
The mounting position for the pilots as shown in fi gures page 36
and the indicated tightening torques must be observed.
For solenoid operators and pilots to ATEX, the instructions
for use given in the specifi c Installation Instructions provided
with the product must be strictly followed.
ASSEMBLY
!
ATEX versions: Make sure that all metal or conductive
parts are always interconnected and connected to earth. The
valve body is connected to earth with the fastening screw
(ref. F).
The valves may be mounted in any position.
Threaded port versions 1/4 and 1/2 (page 36):
Mount the valve with two screws (ref. 8) (not supplied).
PNEUMATIC CONNECTION (fi g. page 36)
• Fit the provided stainless steel exhaust protectors (Rep. 3).
• Connection of pneumatic pilot version:
1/8 NPT or 1/4 NPT.
• Connection of pilot exhausts (M5)
The exhausts can be collected.
• General recommendations for pneumatic connection
Correctly support and align the pipes to prevent mechanical
strain on the valve. When tightening, do not use the valve
as a lever; locate wrenches as close as possible to con-
nection point. To avoid damage to the equipment, DO NOT
OVERTIGHTEN pipe connections.
• Threaded 1/4 and 1/2:
Connection of the spool valve:
Connect pipes as indicated on the label:
- 5/2 function:
Pressure inlet at port 1. Pressure outlet at ports 2 and 4.
The exhausts are channelled through the valve to ports 3
and 5.
MAINTENANCE
!
Prior to any maintenance work or putting into operation,
power off, depressurise and vent the valve to prevent
the risk of personal injury or damage to equipment.
• Cleaning
Maintenance of the valves depends on the operating con-
ditions. They must be cleaned at regular intervals. During
servicing, the components must be checked for excessive
wear. The components must be cleaned when a slowing
down of the cycle is noticed even though the pilot pressure
is correct or if any unusual noise or a leak is detected.
• Sound emission
The exact determination of the sound level can only be car-
ried out by the user having the valve installed in his system.
The emission of sound depends on the application, fl uid and
type of equipment used.
2
GB
• Preventive maintenance
- Operate the valve at least once a month to check its func-
tion.
- If problems arise during maintenance or in case of doubt,
please contact us or one of our authorised representatives.
• Troubleshooting
- Incorrect outlet pressure: Check the pressure on the supply
side of the valve; it must correspond to the values indicated
on the nameplate.
Caution: observe the minimum pilot pressure value 2,5 bar.
To avoid personal injury or damage to equipment, check that
the valve operates correctly before putting it back into operation.
• Spare parts
Coils are available as spare parts.
If necessary, replace the entire valve.
530552-001
Installation and Maintenance Instructions
Series 551-553 solenoid valves, metal-to-metal,
stainless steel body, 1/4", 1/2" thread
3
GB
5/2
530552-001

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Resumen de contenidos para Asco 551 Serie

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