ASCO 551 Valves | Exd Flameproof ATEX IECEx Solenoid Valves NAMUR (Brass)

Ex d Flameproof Solenoid Valves | ASCO 551 NAMUR (Brass)

eX D Flameproof

ASCO 551 NAMUR solenoid Valves

ASCO 551 Series Exd Flameproof Valves are NAMUR style single/dual solenoid valves, which are pilot operated, have a brass body and 1/4 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 certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1.

eX D Flameproof solenoid Valves

features

• ASCO flameproof brass 551 NAMUR solenoid valves can be adapted for 3/2 NC or 5/2 functions to control both double and single-acting actuators
• The solenoid operated spool valves have threaded port connections and a ‘NAMUR’ interface
• 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

asco 551 solenoid valves

specification

Differential Pressure: 2 – 10,4 bar [1 bar =100 kPa]
Flow (Qv at 6 bar): 700 l/min (ANR)
Fluids: air, inert gas, filtered
Temperature Range: -40°C to +60°C
Seal Materials: VMQ (silicone) + PUR (polyurethane)

Materials In Contact With Fluid

➡ The complete specification for the full range of ASCO 551 ‘NAMUR’ style Ex d flameproof solenoid valves is available on the Data Sheet.

asco 551 valves – dimensions

Type ASCO 551 NAMUR Style Valves

ASCO 551 Valves | Exd Flameproof ATEX IECEx Solenoid Valves NAMUR (Brass) | Dimensions

1. Interface Plate
2. 2 mounting holes: 5,3 mm dia. (Spotfacing: 9 mm dia., depth 5 mm); 2 screws (CHc M5 x 35), engaged length: 7 mm
3. One 5 mm dia. hole for dowel pin:
   – in position C1: 3/2 NC function plate
   – in position C2: 5/2 function plate
4. 2 O-ring seals (supplied)

Certified For Hazardous Area Flow Control | ATEX Valves

Flameproof | Encapsulated | Increased Safety | Intrinsically Safe | Non-Sparking Explosion Proof

Data Sheets

• ASCO 551 Valves | ATEX IECEx Solenoid Valves NAMUR (Brass) | Data Sheet
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