ASCO 551 553 Solenoid Valves (Spool) 3/2 NC, ¼”-3/8”-1/2” Aluminium (15/30 Pilots) – Hazardous Area Valve Ex d, Ex e mb, Ex ia, Ex Na
ASCO 551 553 – Pilot Operated Spool Solenoid Valves For Hazardous Areas & Potentially Explosive Atmospheres
ASCO 551 553 hazardous area solenoid valves are pilot operated spool type valves suitable for hazardous areas installation with international classifications including ATEX, UL, CSA and other local approvals on request.
3/2 – Way Solenoid Valve
NC – Normally Closed Valve
NO – Normally Open Valve
Via ASCO Numatics FASTSHIP and SAMEDAY Express Delivery Service we are able to deliver 2,000+ ASCO valves from stock direct to you.
T&D are an Authorised UK Distributor for ASCO Numatics, part of Emerson Industrial Automation.
ASCO 551 553 SOLENOID VALVES
- The monostable spool valves in conformity with IEC 61508 Standard (2010 route 2H version) have TÜV (551 series) and EXIDA (551-553 series) certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1
- ASCO 551 553 spool valves 3/2 NC have threaded port connections
- 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)
- Ultra low power level for inside application, suitable to connect to process fieldbus remote I/O or valve couplers
- ASCO 551 553 solenoid valves satisfy all relevant EC Directives
Differential Pressure : 2 – 10.4 bar [1 bar = 100 kPa]
Flow (Qv at 6 bar): 1/4 = 860 l/min (ANR)
1/2 = 3800 l/min
| Fluids | Temperature Range (TS) | Valve Seal Materials |
| air, inert gas, filtered | – 25°C to + 40°C (1) | NBR Nitrile + PUR Polyurethane |
| – 25°C to + 60°C |
(1) With series 302 pilots, prefixes CFSC/CFVT/CFSCIS/CFSCZN
ASCO 551-553 solenoid valves are available with NAMUR interface. NAMUR, translated from the German acronym to StandardiSation Association for Measurement and Control in Chemical Industries, is the specification for a standard interface between pneumatic actuators, solenoid valves and directional control valves.
ASCO 551 553 – valve FLUID CONTACT COMPATIBILITY
| ASCO 551 553 Solenoid Valve | |
| Body | Aluminium, black anodised |
| End cover (spring return) | Glass-filled PA |
| Spool valve internal parts | Zamak, stainless steel, POM, aluminium |
| Pilot internal parts | Size 30 (E06.05.80), refer to specific catalogue pages: 314/LPKF (contact us) and 195 (LISC) pilots Size 15 (E06.36.120N), refer to specific catalogue pages: 302 pilots (CFSC/CFVT/CFSCIS/CFSCZN) and 630 piezotronic (PISC-PISCIS) |
| Pilot ends cover | Aluminium |
ASCO 551 553 – valve ELECTRICAL CHARACTERISTICS
Valve Coil Insulation Class : F
Electrical Safety : IEC 335
Standard Valve Voltages : DC (=) (8) : 24V – 48V ; CFSC/CFSCZN/CFVT : 24V CFSCIS : 12V – 24V ; LISC : 12..24V, PISC : 24V à 70V ; PISCIS : 6V, 8V, 12V, 24V
AC (~) (8) : 24V – 48V – 115V – 230V/50Hz ; CFSC : 24V – 115V – 230V/50Hz ; PISC : 24V to 70V – Other voltages and 60Hz are available on request
ASCO 551 553 – VALVE SPECIFICATIONS
| Pipe size | Orifice size | Flow coefficient kV | Operating pressure differential (bar) | Power level ~/= | ASCO Catalogue number | ||||
| (mm) | (m3/h) | (i/min) | Min | Max (PS) | CNOMO size 30 | CNOMO size 15 | |||
| air (*) | |||||||||
| ~ | = | ||||||||
| Solenoid air pilot operated – spring return (monostable) | |||||||||
| 1/4 | 6 | 0.75 | 12.5 | 2 | 10 | 10 | LP | – | ASCO 551C506 |
| 1/4 | 6 | 0.75 | 12.5 | 2 | – | 8 | LP | – | ASCO 551C506 |
| 1/4 | 6 | 0.75 | 12.5 | 2 | 10 | 10 | BP | ASCO 551A206 | – |
| 1/4 | 6 | 0.75 | 12.5 | 2 | – | 8 | LP | ASCO 551B206 | – |
| 1/4 | 6 | 0.75 | 12.5 | 2 | 8 | 8 | UP | – | ASCO 551C506 |
| 1/2 | 13 | 3.15 | 52.5 | 2 | 10 | 10 | LP | – | ASCO 553A506 |
| 1/2 | 13 | 3.15 | 52.5 | 2 | – | 8 | LP | – | ASCO 553A506 |
| 1/2 | 13 | 3.15 | 52.5 | 2 | 10 | 10 | BP | ASCO 553A206 | – |
| 1/2 | 13 | 3.15 | 52.5 | 2 | – | 8 | LP | ASCO 553B206 | – |
| 1/2 | 13 | 3.15 | 52.5 | 2 | 8 | 8 | UP | – | ASCO 553A506 |
ASCO 551 553 – VALVE OPTIONS
- TPL numbers: TPL 20665: Piezotronic, PISCIS prefix, 12 HV (32 mW); TPL 20666: Piezotronic, PISCIS prefix , 24 HV (125 mW) TPL 20674: LED and protection, CFSC prefix, only available in 24 V AC/DC and 115 V AC – Add 0,15 W (DC) and 0,4 W/VA (AC)
- Other pipe threads are available on request
ASCO SOLENOID VALVES – ATEX, IEC EX & NEMA hazardous area CERTIFIED
ASCO Solenoid Valves For Hazardous Area Oil, Gas & Petrochem Industries (ATEX & IECEx) – call T&D for sales, technical and specification support on all ASCO valves.
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Hazardous Area Certification
ATEX (Zone 1 Zone 2), IEC Ex, NEMA (Div 1 Div 2) & Explosion Protection
➡ Did you know? T&D supply ATEX hazardous area certified Analytic Gas Heated Hoses.
➡ Did you know? T&D distribute Hazardous Area Instrumentation Equipment as Approved Vendors to global oil and gas operators and their EPC’s.
ASCO 551 553 Solenoid Valves (Spool) 3/2 NC, ¼”-3/8”-1/2” Aluminium (15 30 Pilots) – Hazardous Area Valve Ex d, Ex e mb, Ex ia, Ex Na
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