ASCO 551 553 Valves | Exd Flameproof ATEX IECEx Solenoid Valves 3/2 (Aluminium)

ASCO 551-553 3/2 Solenoid Valve - Pilot Operated Valve

ASCO 551-553 3/2 Ex d Flamproof Solenoid Valve – Pilot Operated

eX D Flameproof

ASCO 551-553 solenoid Valves

ASCO 551-553 Exd Flameproof Valves are single/dual solenoid valves, which are pilot operated, have an aluminium body and are 1/4 and 1/2 tapped.

The monostable spool valves are manufactured and certified for hazardous area use according to IEC 61508 Standard (2010 route 2H version) and are TÜV (551 series) and EXIDA (551-553 series) certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1.

eX D Flameproof solenoid Valves

features

The 3/2 NC spool solenoid valves have threaded port connections
In order to provide better environmental protection against the ingress of liquids, dusts and other foreign matter, all of the exhaust ports are connectable. This is particularly recommended for sensitive areas, such as clean rooms, and applications within the pharmaceutical and food processing sectors
The Ex d flameproof solenoid valves can be externally piloted via an external air pilot supply, in order to convert the valve to zero minimum operation by flipping a gasket
The solenoid valves can be mounted in any position without affecting operation
Ex mb/mD (prefix “PV”) solenoid can be supplied with various lengths of cable
Other pipe threads are available on request

Explosion Proof Valve Operators – ASCO Solenoid Valves & Valve Operators are ATEX & IECEx certified for Class I, Division 2 and Zone 1 & Zone 2 hazardous areas.

asco 551-553 solenoid valves

specification

Differential Pressure: 2 – 10,4 bar [1 bar =100 kPa]
Flow (Qv at 6 bar): 1/4 = 860 l/min (5/2) ; 760l/min (5/3) (ANR) | 1/2 = 3800 l/min (5/2, 5/3)
Fluids: air, inert gas, filtered
Temperature Range: -25°C to +60°C
Seal Materials: NBR (nitrile) + PUR (polyurethane)

Materials In Contact With Fluid

Body	Aluminium, black anodised
End cover (spring return)	Glass-filled PA
Spool valve internal parts	Zamak, stainless steel, POM, aluminium
Pilot end covers	Aluminium
Core tube	Stainless steel
Core and plugnut	Stainless steel
Core spring	Stainless steel
Seals	NBR (Nitrile Butadiene Rubber)
Top disc	PA (Polyamide Nylon)
Disc holder	CA (Cellulose Acetate)
Cartridge (low power)	Welded, stainless steel or aluminium
Seat	Brass
Seat insert	CA (Cellulose Acetate)
Shading coil	Copper
Rider rings (low power)	PTFE (NF/WSNF solenoids only)