EF551G401MO EF551G402MO G1/4" ASCO Solenoid valve Explosion proof coil single/dual solenoid 3/2~5/2way Aluminium body

EF551G401MO EF551G402MO G1/4" ASCO Solenoid valve Explosion proof coil single/dual solenoid 3/2~5/2way 
 
 
FEATURES
• The monostable spool valves in conformity with IEC 61508 Standard (2010 route 2 H version) have TÜV (551 series) and EXIDA (551-553 series) certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1
• The solenoid operated spool valves have threaded port connections and "NAMUR" interface
• The same spool valve can be adapted for 3/2 NC or 5/2 functions for controlling double-acting and single-acting actuators
• All the exhaust ports of the spool valve are connectable, providing better environmental protection. Particularly recommended for sensitive areas, such as clean rooms, and applications in the pharmaceutical and food processing sectors
• The valves offer environmental protection against the ingress of liquids, dusts or other foreign matter (environmentally-protected construction)
• Can be externally piloted (external air pilot supply) to convert valve to zero minimum operation by flipping a gasket
• The solenoid valves satisfy all relevant EU Directives
 
GENERAL
Differential pressure                    2 - 10,4 bar [1 bar =100 kPa]
Flow (Qv at 6 bar)                       1/4 = 700 l/min (ANR)
                                                    1/2 = 3000 l/min

 
MATERIALS IN CONTACT WITH FLUID
Ensure that the compatibility of the fluids in contact with the materials is verified
Body, end cover                                                  Aluminium, black anodized
End cover (spring return)                                    Glass fibre filled PA
Interface plates                                                   Glass fibre filled PA
Spool valve internal parts                                   Zamak, stainless steel, POM, aluminium
Pilot internal parts                                               Refer to specific solenoid catalogue pages
Pilot end covers                                                  Aluminium
Core tube                                                            Stainless steel
Core and plugnut                                                Stainless steel
Core spring                                                         Stainless steel
Seals                                                                   NBR
Top disc                                                               PA
Disc holder                                                          POM
Cartridge (low power)                                         Welded, stainless steel or aluminium
Seat                                                                    Brass
Seat insert                                                          POM
Shading coil                                                        Copper
Rider rings (low power)                                      PTFE (NF/WSNF solenoids only)
 
INSTALLATION
• Multi language installation/maintenance instructions are included with each valve
• The solenoid valves can be mounted in any position without affecting operation
• 3/2 NC-5/2 spool valve supplied with one or two interface plates with NAMUR mating surfaces. Depending on function (3/2 NC or 5/2), position the plate (series 551) or one of the two plates (series 553) on the spool valve body before installing on actuator
• 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 specific version
• Dowel pin (if necessary), bolts and gaskets are standard supplied
• IEC 61508 Functional Safety (suffix SL). Check temperature range of valve body and solenoid for suitability. For probability of failure, contact us
• It is necessary to connect pipes or fittings to the exhaust ports to protect the internal parts of the spool valve and its pneumatic operator if used outside or in harsh environments (dusts, liquids etc.)
• Threaded pipe connection identifier is 8 = NPT (ANSI 1.20.3); G = G (ISO 228/1)
• Ex db Prefix "NF/WSNF" enclosure is provided with a 1/2" NPT threaded entry hole, M20 x 1,5 (prefix "ET") is optional. These are supplied without cable gland
• To comply with IEC 61508 (SIL) the valves must be provided with a specific exhaust protector (see following pages)

 EF551G401MO 
 
EF551G402MO