ASCO 551 Solenoid Valves (Spool) 3/2 NC, ¼” Brass (15/16 Pilots) – Hazardous Area Valve Ex d, Ex mb, Ex e mb, Ex ia, NEMA

Product Overview

ASCO 551 hazardous area solenoid valves are pilot operated or air 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.

Asco 551 Solenoid Valves

• The ASCO 551 monostable spool valves in conformity with IEC 61508 Standard (2010 route 2H version) have TÜV certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1
• 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 solenoid valve offers environmental protection against the ingress of liquids, dusts or any 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 EC Directives

Differential Pressure : 2 – 10, 4 bar [1 bar = 100kPA]

Flow (Qv at 6 bar): 860 l/min (ANR)

ASCO 551 – valve ELECTRICAL CHARACTERISTICS

Valve Coil Insulation Class : F

Electrical Safety : IEC 335

Standard Valve Voltages : DC (=) 24V – 48V

AC (~) 24V – 48V – 115V – 230V/50Hz; other voltages and 60Hz are available on request

ASCO 551 – VALVE SPECIFICATIONS – Air operated

*Select 8 for NPT ANSI 1.20.3 or select G for ISO G (228/1)

Asco 551 – Valve Options

• Valves configured for external pilot air supply, TPL 20547
• Other pipe threads are available on request
• Ex mb/mD (prefix “PV”) solenoid can be supplied with various cable lengths
• Compliance with “UL”, “CSA” and other local approvals available on request
• 1/2″ NPT (prefix “T”) and M20 x 1.5 (prefix “ET”) conduits (aluminium or 316 SS) available for steel solenoid housing

ASCO SOLENOID VALVES – ATEX, IEC EX & NEMA hazardous area CERTIFIED

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