ASCO 551 Valves | Exd Flameproof ATEX IECEx Solenoid Valves 5/2 (Brass)
ASCO 551 Valves | Ex d Flameproof ATEX IECEx Solenoid Valves 5/2 (Brass)
eX D Flameproof
ASCO 551 5/2 solenoid Valves
ASCO 551 Series Exd Flameproof Valves are single/dual solenoid valves, with mono/bistable function, which are pilot operated, have a brass body and are 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 TÃœV certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1.
eX D Flameproof solenoid Valves
features
- 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
- ASCO 551 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): 860 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
| Body, end covers | Brass |
| Spool valve internal parts | Brass, stainless steel, POM |
| Core tube | Stainless steel |
| Core & plugnut | Stainless steel |
| Core spring | Stainless steel |
| Seals & discs | NBR (Nitrile Butadiene Rubber) |
| Top disc | PA (Polyamide Nylon) |
| Disc holder | POM |
| Cartridge (low power) |
Welded, packless AISI 430 |
| Seat |
Brass |
| Seat insert |
POM |
| Shading coil | Copper |
| Rider rings (low power) |
PTFE (NF/WSNFÂ solenoids only) |
âž¡ The complete specification for the full range of ASCO 551 5/2 Ex d flameproof solenoid valves is available on the Data Sheet.
asco 551 valves – dimensions
Type ASCO 551 Flameproof Solenoid Valves
ASCO 551 Valves | Exd Flameproof ATEX IECEx Solenoid Valves 5/2 (Brass) | Dimensions
Certified For Hazardous Area Flow Control | ATEX Valves
Flameproof | Encapsulated | Increased Safety | Intrinsically Safe | Non-Sparking Explosion Proof
ASCO 551 Valves | ATEX IECEx Solenoid Valves 5/2 (Brass) | Data Sheet
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