ASCO 551 Solenoid Valve - 3 Way ¼" Pilot Operated Solenoid Valve Brass Body

ASCO 551 Solenoid Valve - Pilot Operated Spool Valve

Pilot Operated, Spool Type, Single/Dual Solenoid (Mono/Bistable Function) Brass Body ¼”

ASCO 551 Series pilot operated, spool type solenoid valves are available in many different configurations to suit a wide variety of applications and safety directives.

Please use the product specification sheet to select the correct ASCO solenoid valve part number or alternatively contact a T&D sales engineer.

ASCO 551 Series, ¼” Pilot Operated Solenoid Valve – Product Features

• The monostable spool valves have TÜV certified IEC 61508 Functional Safety data and can be used up to SIL 4
• 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)
• 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

Hazardous Area Pilot Operated Solenoid Valve Solutions – ASCO 551 Series

Nema 7 & 9, ATEX/IECEx Ex d, Ex ia, Ex e mb, Ex mb options are available with the ASCO 551 series solenoid valves.

Additional Options

Valves configured for external pilot air supply, TPL 20547

Other pipe threads are available on request

Ex mb/mD (prefi x "PV") solenoid can be supplied with various cable lengths

Compliance with "UL", "CSA" and other local approvals available on request

1/2" NPT (prefi x "T") and M20 x 1.5 (prefi x "ET") conduits (aluminium or 316 SS) available for steel solenoid housing