ASCO 551 553 Valves | Exd Flameproof ATEX IECEx Solenoid Valves NAMUR (Stainless Steel)

Product Overview

ASCO 551-553 solenoid Valves

ASCO 551-553 Exd Flameproof Valves are single/dual ‘NAMUR’ style solenoid valves, which are pilot operated, have a stainless steel 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.

features

• ASCO flameproof stainless steel 551 & 553 NAMUR solenoid valves can be adapted for 3/2 NC or 5/2 functions to control both double and single-acting actuators
• The 3/2 NC or 5/2 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 – ASCO Solenoid Valves & Valve Operators are ATEX & IECEx certified for Class I, Division 2 and Zone 1 & Zone 2 hazardous areas.

specification

Differential Pressure: 2 – 10,4 bar [1 bar =100 kPa]
Flow (Qv at 6 bar): 1/4 = 700 l/min (ANR) | 1/2 3000l/min
Fluids: air, inert gas, filtered
Temperature Range: -40°C to +60°C (553) | -40°C to +80°C (551)
Seal Materials: VMQ (silicone) + PUR (polyurethane)

asco 551-553 valves – dimensions

Type ASCO 551 – 553 ‘NAMUR’ style- Stainless Steel

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)
5. 2 mounting holes: 6,5 mm dia. (Spotfacing: 11 mm dia., depth 6 mm); 2 screws (CHc M6 x 50), engaged length: 7 mm