ASCO NFIS WSNFIS Series | Ex ia Intrinsically Safe ATEX IECEx Solenoid Valve Operators 3/2

ASCO NFIS WSNFIS Series | Ex ia Intrinsically Safe Operators

ASCO nfis wsnfis Solenoid valve Operators

EX ia intrinsically safe

ASCO NFIS WSNFIS explosion proof solenoid valve operators are ATEX certified for installation in potentially explosive atmospheres located in hazardous areas.

The solenoid operators with Intrinsically Safe IEC explosion protection techniques, are suitable for use in hazardous areas with exposure to gas, classified as Zone 0 or those exposed to dust and classified as Zone 21.

Hazardous Area Classification & Ex Safety Codes

ATEX Solenoid Valves

NFIS

Gas – II 1G Ex ia IIC T6 Ga
Dust – II 2D Ex tb IIIC T85°C Db IP66/67

WSNFIS

Gas – II 1G Ex ia IIC T6 Ga
Dust – II 2D Ex tb IIIC T85°C Db IP66/67

EC type certificate – LCIE 12 ATEX 3031X

IECEx certificate – IECEx LCI 12.0012X

IP66/IP67 ingress protection

The Ex ia solenoid operators, used in conjunction with valves, are compliant with International and European Standards EN-IEC 60079-0, EN-IEC 60079-11 and EN-IEC 60079-31 and also certified for use in potentially explosive atmospheres according to ATEX-Directive 2014/34/EU.

ASco nfis & wsnfis valve operators – features

• NFIS & WSNFIS solenoid valve operators are highly efficient. They can operate at a very low power level of 0.5W
• The solenoid operators have a chromated aluminium, epoxy coated (NFIS) or 316L grade Stainless Steel (WSNFIS) enclosure
• Continous duty, class H moulded coil contains moulded in solid state components to enable switch-off peak voltage suppression, independent polarity connection and electronic enhancement
• These Ex ia operators are suitable for use with 327 Series solenoid valves
• Conduit hub, 1/2″NPT, M20 x 1,5, 3/4″NPT or M25 x 1,5 in aluminium or stainless steel
• Brass nickel plated or stainless steel cable gland

asco nfis & wsnfis operators – SPECIFICATION

asco ex ia valve operators – ELECTRICAL CHARACTERISTICS & Connections

Electronic Enhanced “IS” Solenoid

• Normal Operating Voltage: 24 Volts, DC +/-10%
• Maximum allowable “off” state current to the valve: < 1 mA
• Maximum capacitor charge time: 2 seconds
• Minimum time between cycles: 2 seconds
• Minimum drop current to reset electronic coil: 2 mA
• A minimum series resistance of 200 Ohms is required in wiring if a safety barrier is not used

Connections:

• The operator can be rotated 360° to select the most favourable position for cable entry
• The solenoid operator can be mounted in any position without affecting operation
• Application of the operator, located within hazardous areas, is not permitted without the addition of an approved and classified device (such as barriers) located between the safe and hazardous area
• Solenoid enclosure has a cable gland with integral strain relief for cables with an o.d. from 7 to 12 mm and is provided with
  an internal and external connection facility for an earthing or bonding conductor

Ex ia intrinsically safe valve operators – dimensions

TYPE NFIS

Prefix “NFIS” Solenoid
Enclosure: Chromated aluminium, epoxy coated
Weight: 1.4 kg

TYPE WSLI

Prefix “WSNFIS” Solenoid
Enclosure: Stainless steel (AISI 316L SS)
Weight: 2.7 kg

ASCO NFIS & WSNFIS Series Solenoid Valve Operators | Dimensions (mm)

recommended interfaces

asco nfis & wsnfis

Located in safe areas, these interfaces allow to feed the intrinsically safe solenoid valves located in explosive areas.
This equipment must be ordered from its respective manufacturers, specifying that they are intended to feed intrinsically safe solenoid operators
NFIS: II1G Ex ia IIC T6 Ga, II 2D Ex tb IIIC T85°C Db IP66/67
WSNFIS: II1G Ex ia IIC T6 Ga, II 2D Ex tb IIIC T85°C Db IP66/67

Read Blog: ATEX Solenoid Valves – ASCO Valves for International Hazardous Area Installations.

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

Data Sheets

• ASCO NFIS WSNFIS Series | Ex ia Intrinsically Safe ATEX IECEx Solenoid Valve Operators 3/2 | Data Sheet
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