ASCO 551 Valves | Ex e mb Increased Safety Encapsulated Brass Solenoid Valves NAMUR
ASCO Solenoid Valves | Ex e mb Increased Safety & Encapsulated (Brass) NAMUR
asco eX e mb solenoid valves
increased safety & encapsulated
551 3/2 NC & 5/2 NAMUR
ASCO 551 Series explosion proof solenoid valves are 1/4 tapped, brass bodied, pilot operated, spool type, NAMUR style, single/dual solenoid valves.
The Ex e mb monostable spool valves are manufactured and certified for hazardous area use according to IEC 61508 Standard (2010 route 2H version) and are TÃœV and EXIDA certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1.
These solenoid valves are supplied with ASCO EM or WSEM Increased Safety & Encapsulated valve operators.
eX E MB INCREASED SAFETY ENCAPSULATED solenoid Valves
features
- The same spool valve can be adapted for 3/2 NC or 5/2 functions for controlling double-acting and single-acting actuators
- 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 e mb 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 satisfy all relevant EU directives
asco 551 EX E MB 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)
Type EM:
- Waterproof IP66/67 – Metal enclosure (EN/IEC 60079-7,-18 and -31)
- ATEX/IECEx valves using these solenoids are approved according to EN ISO 80079-36 (2016) and EN ISO 80079-37 (2016) [non electrical]
ASCO Solenoid Valves | Type 04
TYPE 04: Metal, epoxy coated / AISI 316L SS | EM / WSEM: EN/IEC 60079-7+18+31
Order Codes: 551A403 / 551A404
ASCO Solenoid Valves | Type 04 | Dimensions (mm)
| Valve Operator Type | Valve Operator Prefix | Power Level | A | B | C | Weight (including coils & connectors) | |
| Monostable | Bistable | ||||||
| 04 | EM/WSEM | Basic Power | 160 mm | 216 mm | 108 mm | 1.62 kg | 2.23 kg |
Type WSEM:
- Waterproof IP66/67 – 316 SS enclosure (EN/IEC 60079-0+7+18+31)
- ATEX/IECEx valves using these solenoids are approved according to EN ISO 80079-36 (2016) and EN ISO 80079-37 (2016) [non electrical]
ASCO Solenoid Valves | Type 09
TYPE 09: Metal, epoxy coated / AISI 316L SS | EM / WSEM: EN/IEC 60079-7+18+31
Order Codes: 551A303 / 551A304
ASCO Solenoid Valves | Type 09 | Dimensions (mm)
| Valve Operator Type | Valve Operator Prefix | Power Level | A | B | C | Weight (including coils & connectors) | |
| Monostable | Bistable | ||||||
| 09 | EM/WSEM | Low Power | 160 mm | 216 mm | 107.2 mm | 1.69 kg | 2.23 kg |
âž¡ For full specification see attached data sheet.
asco ex e mb valves – ordering information
| Pipe Size | Orifice Size | Flow Coefficient Kv | Operating Pressure Differential (bar) | Power Level | Ex e mb Prefix |
Thread Type | ASCO Order Code | |||
| Minimum* | Maximum (PS) | |||||||||
| Air | ||||||||||
| (m³/h) | (l/min) | ∼ | = | ∼/= | ||||||
| 3/2 NC – 5/2 – Solenoid air pilot operated – spring return (monostable) | ||||||||||
| 1/4 | 6 | 0.75 | 12.5 | 0 / 2 | 10 | 10 | Basic Power | EM | NPT ANSI 1.20.3 | 8551A403** |
| ISO G (228/1) | G551A403** | |||||||||
| Low Power | NPT ANSI 1.20.3 | 8551A303** | ||||||||
| ISO G (228/1) | G551A303** | |||||||||
| 3/2 NC – 5/2 – Solenoid air pilot operated and return (bistable) | ||||||||||
| 1/4 | 6 | 0.75 | 12.5 | 0 / 2 | 10 | 10 | Basic Power | EM | NPT ANSI 1.20.3 | 8551A404 |
| ISO G (228/1) | G551A404 | |||||||||
| Low Power | NPT ANSI 1.20.3 | 8551A304 | ||||||||
| ISO G (228/1) | G551A304 | |||||||||
* Zero minimum is only achieved if external pressure is applied.
**Use suffix “SL” where IEC 61508 Functional Safety data certification is required.
asco 551 valves – dimensions
Type ASCO 551 3/2 NC 5/2 NAMUR
ASCO 551 3/2 NC 5/2 NAMUR Solenoid Valves | Dimensions (mm)
electrical characteristics & connections
Coil insulation class: F
Electrical safety: IEC 335
Standard voltages: DC (=) 24V – 48V | AC (~) 24V – 48V – 115V – 230V/50Hz; (other voltages and 60Hz are available on request)
Basic Power – Type 04
- Power Ratings – Inrush (VA): 55, Holding (VA): 23, Holding (W): 10.5, Hot/Cold (W): 9/11,2
- Operator Ambient Temperature Range (TS) : -40°C to +40°C
- Hazardous Area Safety Code: II2G Ex eb mb IIC Gb T3, II2D Ex tb IIIC Db
- Electrical Enclosure Protection (EN 60529): IP66/67, steel /SS
- Electrical Connections: M20 plastic cable gland for cables with an outer diameter from 7 to 12 mm
Low Power – Type 09
- Power Ratings – Inrush (VA): 1.5, Holding (VA): 1.5, Holding (W): 1.5, Hot/Cold (W): 1,7/1,7
- Operator Ambient Temperature Range (TS) : -40°C to +40/55°C
- Hazardous Area Safety Code: II2G Ex eb mb IIC Gb T6/T5, II2D Ex tb IIIC Db
- Electrical Enclosure Protection (EN 60529): IP66/67, steel /SS
- Electrical Connections: M20 plastic cable gland for cables with an outer diameter from 7 to 12 mm
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 NAMUR (Brass) | Data Sheet
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