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Namur valves, pilot operated or air operated, spool type single/dual solenoid or air (mono/bistable function) aluminium body, 1/4 bsp to 1/2 bsp ports
ASCO direct mount air solenoid valves utilize the standard NAMUR interface mounting pattern. NAMUR provides a standard footprint for mounting directional control valves directly to a pneumatic rotary actuator, eliminating unnecessary pipe or tubing. The valve is convertible from a 4-way 2-position to a 3-way 2-position valve for operating either double acting or spring return actuators. The compact high flow design includes a black anodized aluminium body, low wattage epoxy moulded coil with DIN style plug connector (included), unique spool design with NBR/polyurethane seals, and a manual override. Optional speed control mufflers can be screwed into the exhaust ports for controlling the speed of an actuator (order separate). Many customers select these valves as an option for use with our air actuated ball valves.

Asco Namur Valves

FEATURES
• The monostable spool valves, series 551, have TÜV certified IEC 61508 Functional Safety data and can be used up to SIL 4/AK 7
• The spool valves have threaded port connections and "NAMUR" style interface
• The same spool valve can be adapted for 3/2 NC or 5/2 function for controlling double-acting and single-acting actuators
•  All the exhaust ports of this 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 valve offers environmental protection against the ingress of liquids, dusts or any other foreign matter (environmentally-protected construction)
•  Epoxy moulded coil for general service applications
•  The solenoid valves satisfy all relevant EC Directives

MATERIALS IN CONTACT WITH FLUID
(*) Ensure that the compatibility of the fluids in contact with the materials is verified
Body - Aluminium, black anodized
End covers + interface plates - Glass-filled PA
Internal parts - Zamak, stainless steel, (POM), aluminium
Seals - NBR + PUR
Core and plugnut - Stainless steel
Shading coil - Copper

3/2 NC - 5/2 - Solenoid air pilot operated - spring return (monostable)
Pipe  Orifice  KV m3/hr    Differential Bar  Std. Cat. Number
1/4           6         6              2min  10max       SCG551A001 MS
3/8         12         6              2min  10max       SCG552A001 MS
1/2         13         6              2min  10max       SCG553A001 MS
3/2 NC - 5/2 - Solenoid air pilot operated and return (bistable)
Pipe  Orifice KV m3/hr    Differential Bar  Std. Cat. Number
1/4           6         6              2min  10max       SCG551A002 MS
3/8         12         6              2min  10max       SCG552A002 MS
1/2         13         6              2min  10max       SCG553A002 MS

ELECTRICAL CHARACTERISTICS
Coil insulation : Class F
Electrical safety :  IEC 335
Standard voltages DC (=) 24V - 48V
AC (~) 24V - 48V - 115V - 230V/50Hz; other voltages and 60Hz are available on request

ADDITIONAL OPTIONS
• Other pipe threads are available on request
• Coil type CM25 with connector size 30 ISO 4400 (Pg 11P) (series 551)
•  Polyamide coil
•  Ex mb (Prefi x "PV") execution can be supplied in various cable lengths
• Compliance with "UL" standard is available on request (552-553 ranges)
• Set of stainless steel mounting screws, catalogue number 978 02 212 (series 551)
• Set of two exhaust reducers, G1/8, catalogue number 881 00 344 (series 551)
• Dustproof ATEX (SCDU) with a coil and spade plug connector with lead (2 m lead), TPL 20651
• Magnetic latch execution for 551 series, TPL 20649

INSTALLATION
• Installation/maintenance instructions are included with each valve
• The valves can be mounted in any position without affecting operation
• IEC 61508 Functional Safety (Suffix SL), allowable temperature range: -40°C to +60°C. 
•  Spool valve supplied with two interface plates with NAMUR mating surfaces. Depending on function (NC 3/2 or 5/2), position one of the two plates on the spool valve body before installing on actuator
•  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.)
• Dowel pin (if necessary), bolts and gaskets are standard supplied
• Threaded pipe connection identifier is: 8 = NPT (ANSI 1.20.3); G = G (ISO 228/1)


Versions for Potentially explosive atmospheres, NAMUR - ALUMINIUM BODY - SERIES 551

Single solenoid pilot operated - spring return (monostable)
NF G5518401 MO, NFG5518401, NKG5518401 MO, NK G5518401, NK G551A201 MS, PV G5518401 MO, PV G5518401, PV G5518301 MO, PV G5518301, PV G551A001 MS, PV G551 A201 MS, EM G5518401 MO, EM G5518401, EM G5518301 MO, EM G5518301, EK G551 A201 MS, ISSC G5518301 MO, ISSC G5518301, WPIS G5518301 MO, WPIS G5518301, ISSC G551 A201 MO

Dual solenoid pilot operated and air return (bistable)
NF G5518402 MO, NF G5518402, NK G5518402 MO, NK G5518402, NK G551A202 MS, PV G5518402 MO, PV G5518402, PV G5518302 MO, PV G5518302, PV G551 A002 MS, PV G551 A202 MS, EM G5518402 MO, EM G5518402, EM G5518302 MO, EM G5518302, EK G551 A202 MS, SSC G5518302, WPIS G5518302 MO, WPIS G5518302, ISSC G551A202 MO

Code number to Valve description

Prefix

Catalogue No.

Voltage Primary

Voltage Dual

AC / DC

Description

SC

G551A001

110/50

   

SC G551A001 110/50

SC

G551A001

24VDC

 

DC

SC G551A001  24VDC SOL/SPR NAMUR

SC

G551A001M

115/50

 

AC

SC G551A001M  110VAC SOL/SPR NAMUR

 

G551A001MS

     

S/P 551 5/2 3/2 G1/4  PV (55190223)

SC

G551A001MS

24 DC

 

DC

SCG551A001MS 24DC      WAS 55100229

SC

G551A001MS

230/50

 

AC

PS  SC G551A001MS  230/50  AC

SC

G551A001MS

24 DC

 

DC

PS     SC G551A001MS   24 DC

 

G551A001MS

     

551 5/2 3/2 G1/4" TPL:20723

SC

G551A001MS

24/50

24/60

AC

SCG551A001MS 24/50-60  WAS 55100229

SC

G551A001MS

48/50

48/60

AC

SCG551A001MS 48/50-60  WAS 55100229

SC

G551A001MS

110/50

 

AC

SC G551A001MS  110/50

SC

G551A001MS

115/50

120/60

AC

SC G551A001MS 115/50-120/60

SC

G551A001MS

220/50

 

AC

SC  G551A001MS  220/50

SC

G551A001MS

230/50

230/60

AC

SCG551A001MS 230/50-60  55100229

SC

G551A001MS

110/60

 

AC

SC G551A001MS   110V60

SC

G551A001MS

12 DC

 

DC

SC G551A001MS 12DC  WAS 55100229

SC

G551A001MS

48 DC

 

DC

SC G551A001MS  48DC  WAS 55100229

SC

G551A001MS

110 DC

 

DC

SC G551A001MS  110 DC  WAS 55100229

SC

G551A001MS

110/50

 

AC

PS  G551A001MS  110/50  AC

SC

G551A001MS

220 DC

 

DC

SC  G551A001MS  220  DC

SCDU

G551A001MS

24 DC

 

DC

SCDUG551A001MS24 DC

PVX

G551A001MS

24 DC

 

DC

PVXG551A001MS2193124 DC

SC

G551A001MSM

230/50

 

AC

SC G551A001MSM  230/50 AC

SC

G551A001MSM

24 DC

 

DC

SC G551A001MSM  24VDC SOL/SPR NAMUR

PVX

G551A001MSM

230/60

230/50

AC

PVXG551A001MSM  TPL 21931  230/50

 

G551A001SCYZ

     

NAMUR 3/2 5/2 INT PRES VESS NO MO

SC

G551A001SL

24 DC

 

DC

SCG551A001SL   24 DC

 

G551A002MS

     

S/P 551 5/2 3/2 G1/4  PV (55190224)

SC

G551A002MS

24 DC

 

DC

SC G551A002MS  24DC  WAS 55100230

SC

G551A002MS

24/50

24/60

AC

SCG551A002MS 24/50-60  WAS 55100230

SC

G551A002MS

230/50

230/60

AC

SCG551A002MS 230/50-/60  55100230

SC

G551A002MS

110/50

 

AC

SC G551A002MS  110/50

SCDU

G551A002MS

24 DC

 

DC

SCDUG551A002MS24 DC

 

G551A005MS

     

3/2 G1/4 SOL/SPR INT(55192005-2025)

SC

G551A005MS

115/50

120/60

AC

3/2 G1/4 115/50-120/60 55102005-25

SC

G551A005MS

230/50

230/60

AC

3/2 G1/4 230/50-60 55102005-25

SC

G551A005MS

12DC

 

DC

3/2 G1/4 E/S IN 12DC(55102005-2025)

SC

G551A005MS

24DC

 

DC

3/2 G1/4 E/S IN 24DC(55102005-2025)

SC

G551A005MS

48DC

 

DC

3/2 G1/4 E/S IN 48DC(55102005-2025)

PVX

G551A005MS

230/50

 

AC

PVXG551A005MS21931230/50

PVX

G551A005MS

24 DC

 

DC

PVX  G551A005MS  21931  24  DC

 

G551A006MS

     

3/2 G1/4 SOL/SOL INT(55192007-2027)

SC

G551A006MS

110DC

 

DC

3/2G1/4 E/E IN 110DC(55102007-2027)

SC

G551A017

     

551 ES NB G1/4 INT WITHOUT MO

SC

G551A017

24 DC

 

DC

SCG551A017    24 DC

 

G551A017MS

     

5/2 G1/4 SOL/SPR INT(55192009-2029)

SC

G551A017MS

24 DC

 

DC

SC G551A017MS  24 DC

SC

G551A017MS

24/50

24/60

AC

5/2 G1/4 24/50-60 IN(55102009-2029)

SC

G551A017MS

115/50

120/60

AC

5/2G1/4 115/50-120/60 (55102009-29)

SC

G551A017MS

230/50

230/60

AC

5/2G1/4 230/50-60 (55102009-29)

SC

G551A017MS

110DC

 

DC

5/2 G1/4 110 DC IN (55102009-2029)

SC

G551A017MS

230AC

 

AC

5/2 SOLENOID  VALVE G1/4 230/50

PVX

G551A017MS

24 DC

 

DC

PVXG551A017MS2193124 DC

SC

G551A017SL

24 DC

 

DC

SC G551A017SL   24 DC

SC

G551A018

24 DC

 

DC

SC G551A018  24 DC BP

 

G551A018MS

     

5/2 G1/4 SOL/SOL INT(55192011-2031)

SC

G551A018MS

24 DC

 

DC

SCG551A018MS   24VDC

SC

G551A018MS

24/50

24/60

AC

5/2G1/4 24/50-60 INT(55192011-2031)

SC

G551A018MS

115/50

120/60

AC

5/2G1/4 115/50-120/60 (55192011-31)

SC

G551A018MS

110DC

 

DC

5/2 G1/4 110DC INT(55192011-2031)

SCDU

G551A018MS

24 DC

   

SCDU  G551A018MS  24  DC

 

G551A018SCYZ

     

551 EE NB G1/4 INT WITHOUT MO

SC

G551A065MS

115/50

   

SC  G551A065MS  115/50 AC

SC

G551A065MS

24 DC

 

DC

SC G551A065MS   24 DC

SC

G551A065MS

48 DC

 

DC

SCG551A065MS   48 DC

SC

G551A066

24VDC

 

DC

SC G551A066 24 DC

 

G551A067MS

     

551 5/3 G1/4 SOL/SOL BODY W1 (SC PH

SC

G551A067MS

24 DC

 

DC

SC G551A067MS  24 DC

SC

G551A067MS

115/50

115/60

AC

SC G551A067MS   115/50  115/60

 

G551A068

     

G551A068

 

G551A068MS

     

551 5/3 G1/4 SOL/SOL BODY W3 PV CO

SC

G551A068MS

115/50

 

AC

551 5/3 W3 SOL VLV G1/4 115/50

 

G551A101

     

5/2-3/2 NAMUR AIR/SPR SP VLV G1/4

 

G551A101GD

     

G551A101GD

 

G551A105

     

3/2 AIR/SPR SPL VLV G1/4 (55102021)

 

G551A106

     

3/2 AIR/AIR SPL VLV G1/4 (55102022)

 

G551A113

     

FRENCH VALVE

 

G551A117

     

5/2 AIR/SPR SP VLV G1/4 (55102023)

 

G551A117GD

     

G551A117GD

 

G551A118

     

5/2 AIR/AIR SPL VLV G1/4 (55102024)

 

G551A167

     

551 5/3 G1/4" W1 AIR/AIR VALVE

 

G551A201

24V DC

 

DC

CODE WRONG - USE G551A201SCD2

 

G551A201

     

5/2-3/2 G1/4 CNOMO 30 (55190201)

ISSC

G551A201

24V DC

 

DC

ISSC G551A201  24 DC

NK

G551A201MS

24VDC

 

DC

NK  G551A201MS  24 V DC

CTNK

G551A202

24 DC

 

DC

CTNKG551A202 24 DC

 

G551A205

     

SPOOL VALVE 551 G1/4 NON-BREATHING

ISSC

G551A205

24 DC

 

DC

ISSC G551A205  24 DC

 

G551A206

     

3/2 G1/4 CNOMO 30 (55192018-2038)

ISSC

G551A217MO

24 DC

 

DC

ISSC G551A217MO  24 DC

ISSC

G551A301

24 DC

 

DC

ISSCG551A30124 DC

WPIS

G551A303MO

24

 

DC

WPIS G551A303MO   24 V DC

WPETIS

G551A307

24 DC

 

DC

WPETISG551A30724 DC

WPETIS

G551A321

24VDC

 

DC

WPETIS G551A321  24 DC  BP

SC

G551A409

230/50

 

AC

SC  G551A409  230/50  AC

SC

G551A409

24 DC

 

DC

3/2 5/2 NAMUR S/S 24 DC

EM

G551A409

24 DC

 

DC

EM G551A409   24 DC

WSNFET

G551A409

24DC

 

DC

WSNFET G551A409 24 DC

WSNFET

G551A409

48 DC

 

DC

WSNFET G551A409  48 DC

 

G551A409SCYZ

     

PRESSURE VESSEL

SC

G551A422

24V DC

 

DC

SC G551A422  24V DC

NFETHT

G551A422

24DC

   

NFETHT G551A422   24 DC

ZN

G551B301

24DC

   

ZN G551B301  24 DV

EMET

G551B301

24V DC

 

DC

EMET G551B301   24 DC

SC

G551B301MO

24VDC

   

SCG551B301MO 24 VDC

WPETIS

G551B301MO

24 DC

 

DC

WPETIS G551B301MO  24 DC

SC

G551B401

24V DC

 

DC

SC G551B401   24 DC

ZN

G551B401

24 DC

 

DC

ZNG551B401GDC24DC

NF

G551B401

24 DC

 

DC

NFG551B401GDC24DC

NFET

G551B401

24DC

 

DC

NFET G551B401 24 DC BP

WSNFET

G551B401

24VDC

   

WSNFET  G551B401  24 V DC

SC

G551B401MO

24 DC

-

DC

SCG551B401MOGDC24DC

WPET

G551B401MO

24VDC

 

DC

WPETG551B401MO 24 DC

NK

G551B401MO

110/50

 

AC

NKG551B401MOGAC110/50

NK

G551B401MO

24 DC

 

DC

400-405-000-142  24 DC

NFET

G551B401MO

24/50

 

AC

NFET G551B401MO 24 V 50 AC

NFET

G551B401MO

230/50

 

AC

NFET  G551B401MO  230/50 AC

NFET

G551B401MO

115/50

 

AC

NFET G551B401MO   115/50

NFET

G551B401MO

24 DC

 

DC

NFET G551B401MO  24 DC

NF

G551B401MO

24 DC

 

DC

NFG551B401MOGDC24DC

NFET

G551B401MO

110/50

 

AC

PS  NFET G551B401MO  110/50  AC

NFET

G551B401MO

230/50

 

AC

PS    NFET G551G401MO  230/50

NFET

G551B401MO

24 DC

 

DC

PS    NFET G551B401MO   24DC

NFET

G551B401MO

48 DC

 

DC

PS  NFET  G551B401MO   48 DC

WPISX

G551B401MO

6V DC

 

DC

WPISX G551B401MO  25910  6 DC

NFET

G551B405

110/50

 

AC

NFET G551B405  110 V 50 AC

EM

G551B405MO

24 DC

-

DC

EMG551B405MOGDC24DC

EMX

G551B405MO

125 DC

 

DC

EMX G551B405MO  25903   125 DC

WPISX

G551B405MO

6 DC

 

DC

WPISX  G551B405MO  25922  6 DC

NF

G551B405MO

115/50

 

AC

NF G551B405MO  115 V 50 AC

ZN

G551B417

24V DC

 

DC

ZN G551B417   24 DC

WP

G551B417

24 DC

   

WP G551B417  24 DC

PV

G551B417

110/50

 

AC

PV G551B417   110/50

PV

G551B417

24V DC

 

DC

PV G551B417   24 DC

EM

G551B417

24 DC

 

DC

EMG551B417GDC24DC

NKET

G551B417

110/50

 

AC

NKETG551B417   AC   110/50

NFET

G551B417

24 DC

 

DC

NFET  G551B417  24 DC

NFET

G551B417MO

24 DC

 

DC

NFETG551B417MORPDC24DC

NF

G551B417MO

110/50

 

AC

NFG551B417MOGAC110/50

EM

G551B418MO

230/50

 

AC

EM  G551B418MO  230/50  AC

PISCIS

G551C501

6 DC

 

DC

PISCIS G551C501   6 DC

PISCIS

G551C501MO

24 DC

 

DC

PISCIS G551C501MO  24 DC

PISCIS

G551C505MO

24VDC

   

PISCIS G551C505MO   24 DC

CFSCIS

G551C517

24 DC

 

DC

CFSCISG551C517-24VDC

SC

G552A001MS

24V DC

 

DC

SC G552A001MS    24 DC

SC

G552A017MS

24DC

 

DC

SC G552A017MS  24 DC  BP

 

For further details on ASCO Namur valves – Click Here