Asco 551 Serie Instrucciones De Puesta En Marcha Y Mantenimiento

INSTALLATION AND MAINTENANCE INSTRUCTIONS
Monostable series 552-553 solenoid valves for safety applications
Aluminium or stainless steel body, 3/8"-1/2" thread – NAMUR interface,
according to IEC standard 61508 (SIL approval)
DESCRIPTION OF THE CERTIFICATION
Versions concerned by the certifi cation, suffi x SL:
Series 552-553, aluminium or stainless steel body, monostable
(spring return), 3/2 NC (normally closed) function or 5/2, version
isolated from the outside atmosphere. Versions without manual
override or with impulse-type manual override:
- with 3/8"-1/2" threaded connection (Do not connect the pres-
sure supply to the exhaust port 3. The "environmentally-protected"
construction is not adapted for a "distributing" function or use in NO
function. Contact us for functions available in specifi c versions)
- with NAMUR interface for direct mounting to single acting (function
3/2 NC) or double acting (function 5/2) pneumatic actuators. The
function of the valve is convertible from 3/2 NC to 5/2 by mounting
the supplied 13/2 NC or 5/2 interface plate at the bottom of the valve
(fi g.3e, 13b, ref. 1a and 1b). (Do not connect the pressure supply
to the exhaust port 3. The "environmentally-protected" construction
is not adapted for NO function. Contact us for function available in
specifi c version)
The use of any other product is prohibited and does not con-
stitute a part of this approval.
IEC standard 61508 describes a set of general requirements for
each phase in the life cycle of a safety system. The reliability analysis
performed by EXIDA has shown that these valves are suitable for use
in systems with a safety integrity level of up to and including SIL 3.
For the installation, maintenance, testing and putting into operation
of these valves, we recommend using the documents according
to IEC standard 61508.Depending on the SIL level, they lay down
the necessary measures relating to the authority, qualifi cation and
independence of the responsible personnel. All indications and
provisions contained in the general installation and maintenance
instructions form the basis of the above-mentioned documents. To
ensure the reliability, all additional provisions mentioned hereinafter
must also be adhered to.
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. 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 lu-
bricated 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 supplied with the product (see
rep. 3).When used in a pipe connection, the valves must be protected
with (an) appropriate fi lter(s). Connect these exhaust protectors to
port 3 (3/2 NC) or ports 3 – 5 (5/2) of the valves.The reliability of
the valve cannot be guaranteed if an exhaust protection other than
that supplied is used. In this case, please contact Asco or one of its
authorised representatives.
- Allowable temperature range: -40°C to +60°C
- Maximum working pressure:
- 2 to 10 bar
- 2 à 8 bar (ISSC/PISC/PISCIS/CFSCIS/CFSDIS/CFVTIS)
DESCRIPTION
ATEX 94/9/EC versions: See "Special conditions for safe use".
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 environmental protection,
particularly recommended for sensitive areas such as clean rooms
3/2 NC
5/2
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 spool valve must be kept in its original packaging as long as it
is left unused. The protective covers must not be removed from the
connection ports and solenoid operators.
Storage conditions: protected from exposure to weather; storage
temperature: -40 C to +70°C ; relative humidity: 95 %
After storage at low temperature, the spool valves must gradually
be brought to operating temperature prior to pressurisation.
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 representa-
tive. 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 = 8/10 bar. Caution: observe the minimum pilot
pressure of 2 bar. Installation and maintenance of the valve must
be carried out by qualifi ed personnel only.
• Standard IP65-rated air operated versions or versions for use in
explosive atmospheres caused by gases, vapours, mists or dusts
according to ATEX Directive 94/9/EC. (The zone classifi cation for
this version is stated on the ATEX label, ref. E1/E2).
E2/Safety code: II 2 GD c Ta 60°C T85°C (T6).
E1/Safety code: II 1 GD c T6 T85°C Ta -40°C to +65°C.
EC type-examination certifi cate no.: INERIS 03ATEX0219 X
Compliance with the Essential Health and Safety Requirements
has been assured by compliance with the European Standards
EN 13463-1 and EN 13463-5.
• Solenoid-air operated versions fi tted with solenoid operators:
- IP65 sealed or
- certifi ed for use in explosive atmospheres according to ATEX Directive
94/9/EC
. Versions with integral pilot, IP65-rated as standard, or for use in
explosive atmospheres II 3D IP65 or ATEX Ex mb/mD
. Versions with solenoid operators with ASCO mounting pad,
IP65-rated as standard, or for use in explosive atmospheres II
3D IP65/IP67 or ATEX/IECEx Ex d, m, em, ia.
. Versions with pilots with CNOMO E06.05.80 (size 30) or CNOMO
E06.36.120N (size 15) mounting pad, IP 65-rated as standard,
or mounting of pilots for use in explosive atmospheres according to ATEX
Ex d or Ex ia. Caution (CNOMO pilots): Placing the valves into zones
(ATEX 1999/92/EC) is defi ned in fi rst line by the indications on the
label (ref. E1/E2) on the body of each valve.
E2/Safety code: II 2 GD c Ta 60°C T85°C (T6).
E1/Safety code: II 1 GD c T6 T85°C Ta -40°C to +65°C.
EC type-examination certifi cate no.: INERIS 03 ATEX 0219 X
When assembling this product to a pilot to ATEX 94/9/EC,
take the least favourable category,maximum working pres-
sure and temperature into account. Compliance with the
Essential Health and Safety Requirements has been assured
by compliance with the European Standards EN 13463-1 and
EN 13463-5.
The mounting position for the pilots as shown in figures
4/5/6/7/8/9/10/11/12/14/15/16 and the indicated tightening torques
must be observed.
For solenoid operators and pilots to ATEX94/9/EC, the instruc-
tions for use given in the specifi c Installation Instructions
provided with the product must be strictly followed.
2
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Monostable series 552-553 solenoid valves for safety applications
GB
Aluminium or stainless steel body, 3/8"-1/2" thread – NAMUR interface,
ASSEMBLY
! ATEX 94/9/EC 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.
Treaded ports 3/8 and 1/2 versions (fi g. 3e) :
Mount the valve with two screws (rep. F) (not supplied).
With NAMUR interface versions (fi g 3e, 13b) :
Before mounting the spool valve on the operator, it must be set to
the required function :
- Select the interface which corresponds to the required function :
3/2 NC or 5/2 (rep.1a or 1b).
- Make sure the seal is properly fi tted (rep.7)
- Assemble the interface under the spool valve with the 2 screws
supplied (rep.8). Make sure the indication of the function is placed
on the return side (polarizing slot)
- Fit the two O-rings (rep.9).
- If necessary, fi t the dowel pin on the operator:
• On the 3/2 NC function plate: the Ø 5 dia. hole is at A3/A1.
• On the 5/2 function plate: the Ø 5 dia. hole is at A3/A2.
PNEUMATIC CONNECTION (fi g. 3e and 13a, 13b)
Depending on the version (3/2 NC or 5/2), one or both stainless
steel exhaust protectors supplied with each product must be
used.
• Connection of pneumatic pilot version:
G 1/4 or NPT 1/4.
• Connection of pilot exhausts
- Connect the exhaust port Ø M5, G 1/8 ou NPT1/8
• Manual override
Depending on the version, the products are supplied without
manual override or with impulse-type manual override for
operation without power.
• General recommendations for pneumatic connection
Connect pipes for the required functions in accordance with this
documentation and the port markings on the product.
Make sure that no foreign matter enters the system.
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 connection point. To
avoid damage to the equipment, DO NOT OVERTIGHTEN pipe
connections.
• Treaded 3/8-1/2 port versions (fi g. 3b/13a):
- Connection of the spool valve:
Connect pipes as indicated on the label:
- 3/2 NC function:
Pressure inlet at port 1 (3/8 ou 1/2). Pressure outlet at port 2.
Exhaust at port 3 (3/8 ou 1/2).
- 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.
• Version with NAMUR interface (fi g 3e, 13b) :
- Connection of the spool valve
Connect pipes as indicated on the label:
- 3/2 NC function:
Pressure inlet at port 1 (3/8 or 1/2). Pressure outlet at port 2 and 4.
Exhaust at port 3 (1/8).Exhaust from the return operator spring
chambers in the single-acting version is channelled through the
valve to Port 3. It is recommended to protect Port 5 (if not used)
- do not stop up it.
- 5/2 function:
Pressure inlet at port 1 (3/8 or 1/2). Pressure outlet at ports 2 and 4.
The exhausts are channelled through the valve to ports 3 and
5 (3/8 or 1/2).
3834944
according to IEC standard 61508 (SIL approval)
ELECTRICAL CONNECTION
• IP65-sealed integral pilot version (fi g. 3b, 3e):
Mount the coil on the tube (rotatable through 360°) and then
the removable ISO 4400/EN 175101-803A connector (cable dia
6-10 mm) rotatable by 90° (3 pins: 2 + earth).
• Version with solenoid heads with ASCO interface: See additio-
nal installation instructions supplied with every solenoid head.
• Version with CNOMO pad mounting: See additional installation
instructions supplied with every pilot valve.
• General recommendations:
Electrical connections must be made by qualifi ed personnel and
according to applicable local standards and regulations.
Caution:
- Before any intervention, turn off the electrical current to power
off the components.
- Depending on the voltage, electrical components must be
grounded according to local standards and regulations.
Most valves are equipped with coils designed for continuous
duty. To prevent the risk of personal injury, do not touch the so-
lenoid operator which can become hot under norrmal operating
conditions. If the valve is easily accessible, the installer must
provide for protection against accidental contact of the solenoid
operator.
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.
ATEX versions: Strictly follow all procedures recommended by
Directive 99/92/EC and associated standards.
• Cleaning
Maintenance of the valves depends on the operating conditions.
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 emission of sound depends on the application, medium and
type of equipment used. The exact determination of the sound
level can only be made by the user having the valve installed in
his system.
• Preventive maintenance
- Operate the valve at least once a month to check its function.
- If problems arise during maintenance or in case of doubt, please
contact ASCO NUMATICS or one of its authorised representa-
tives.
• 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 of 2 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.
3
3/2 NC
GB
5/2
3834944