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This ATEX directive is adopted by the European Union (EU) to facilitate free trade in the EU by aligning the technical and legal requirements in the Member States for products intended for use in potentially explosive atmospheres.

The Directive covers equipment and protective systems, which may be used in areas endangered by potentially explosive atmospheres created by the presence of flammable gases, vapours or dusts. The Directive covers both electrical and mechanical equipment.


What is a potentially explosive atmosphere?

A explosive atmosphere is defined as a mixture of:

• An inflammable substance (dust, gas, mists or dusts)
• The oxygen in the surrounding air = always present
• Under atmospheric conditions
- In which, after ignition has occurred, combustion spreads to the entire unburned mixture (in the case of fibers, the dust may not completely burned after combustion).

A Potentially explosive atmosphere is an atmosphere which could become explosive due to local and operational condition.


ASCO Solenoid valve, spool valve ATEX operators overview.



ASCO Operators


II2G Ex d IIB+H2 T6, II2D Ex tD A21 IP67 T85°C

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II 2 G Ex d IIC T6..T4, II 2 D Ex tD A21 IP67

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II 2 G Ex d IIB + H2 T6.. T4, II 2 D Ex tD A21 IP65

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II 2 G Ex mb II T6..T3, II 2 D Ex mD 21 IP67

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II 2 G Ex emb II T6..T3, II 2 D Ex tD A21 IP67

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II 1G/2D EEx ia IIC T6

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II 3 G/D EEx nA II T4-T3 IP65

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II 3 G/D EEx nA II T6-T3 IP67

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II 3 D IP65 (moulded coil types with connectors, CM22-CM22-CM25-CM30)

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II 3 D IP65 (moulded coil types with connectors, XM5-M6-MXX-M12)

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II 3 D IP67 (steel or stainless steel enclosure)

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ASCO Direct acting solenoid valves



2/2 NC-NO, 1/4 - Ex d, Ex m, Ex em, EEx nA, EN 50281-1-1

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3/2 NC, NO, U, 1/4 - Ex d, Ex m, Ex em, EEx nA, EN 50281-1-1

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3/2 pad mounting for subbase 1/4 or 1/2

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3/2 NF, NO, U, 3 ports in body - Ex d, Ex m, Ex em, EEx nA, EN 50281-1-1

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3/2 U, high flow, 1/4 - Ex d, Ex m, Ex em, EEx nA, EN 50281-1-1, NEMA

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3/2 U, high flow, 1/4-1/2- Ex d, Ex m, Ex em, EEx nA, EN 50281-1-1

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3/2, redundant, high flow, 1/4- Ex d, Ex m, Ex em, EEx nA, EN 50281-1-1, NEMA

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3/2 U, 1/4, II 2 G Ex d IIC T6-T5, II 2 D Ex tD A21 IP65

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3/2 NC, ISO 15218 (CNOMO, size 30) interface, II 2 G Ex d IIB + H2 T6..T4, II 2 D Ex tD A21 IP65

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2/2-3/2 NC, 1/4, II II 2 G Ex d IIC T6-T5, II 2 D Ex tD A21 IP65

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3/2 NC-4/2, 1/4, II II 2 G Ex d IIC T6-T5, II 2 D Ex tD A21 IP65, 3 or 4 ports in the body

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3/2 NC-NO, pad mounting, ISO 15218 (CNOMO, size 15) interface, II 1 GD EEx ia IIC T6 IP65

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3/2 NC, pad mounting, ISO 15218 (CNOMO, size 15) interface, II 1 GD EEx ia IIC T6..T4 IP65

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3/2 NC, pad mounting, ISO 15218 (CNOMO, size 30) interface, II 2 G Ex ia IIC T6 / IIB T4 IP65

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2/2 NC-NO / 3/2 NC-NO-U, pad mounting,
ISO 15218 (CNOMO, size 15) interface, II 3 GD EEx nA IIC T6-T5 IP65/IP67

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ASCO Solenoid valves manual reset construction


3/2 U, 1/4, high flow - Ex d, Ex m, Ex em, EEx nA, EN 50281-1-1, NEMA

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3/2 U, 1/4, II 2 G Ex d IIC T6-T5, II 2 D Ex tD A21 IP65

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Spool valves


3/2 NC, 1/4-3/8-1/2, aluminium body - Ex d, Ex m, Ex em, 2 G/D EEx ia, EEx nA, EN 50281-1-1, NEMA

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3/2 NC, 1/4, brass body - Ex d, Ex m, Ex em, 1 G/D EEx ia, EEx nA, EN 50281-1-1, NEMA

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3/2 NC, 1/4, stainless steel body- Ex d, Ex m, Ex em, 1 G/D EEx ia, EEx nA, EN 50281-1-1, NEMA

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5/2-5/3, 1/4-3/8-1/2, aluminium body - Ex d, Ex m, Ex em, 2 G/D EEx ia, EEx nA, EN 50281-1-1, NEMA

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5/2, 1/4, brass body - Ex d, Ex m, Ex em, 1 G/D EEx ia, EEx nA, EN 50281-1-1, NEMA

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5/2, 1/4, stainless steel body - Ex d, Ex m, Ex em, 1 G/D EEx ia, EEx nA, EN 50281-1-1, NEMA

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ASCO Spool valves and solenoid valves with "NAMUR" mating surface



3/2 NC-5/2 5/3, 1/4-3/8-1/2, aluminium body - Ex d, Ex m, Ex em, 2 G/D EEx ia, EEx nA, EN 50281-1-1, NEMA

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3/2 NC-5/2, 1/4, brass body - Ex d, Ex m, Ex em, 1 G/D EEx ia, EEx nA, EN 50281-1-1, NEMA

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3/2 NC-5/2, 1/4, stainless steel body - Ex d, Ex m, Ex em, 1 G/D EEx ia, EEx nA, EN 50281-1-1, NEMA

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3/2 NC, 1/4

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ASCO Valves


2/2 or 3/2 angle seat valves NC/NO

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2/2 NC/NO or 3/2 U valves

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Accessories


Cable glands, II 2 G Ex d IIC, 2 D Ex tD

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