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 Technical    ATEX Guide 

ATEX Certified Explosion Proof Solenoid Valves for Hazardous Gas and Dust Areas.

ATEX encapsulated EEx M II T4 solenoid valves for Zone 21 and 22, ATEX EEx d IIC T4 and T6 Explosion and flame proof solenoid valves and a small range of ATEX EEx ia IIC T4 and T6 intrinsically safe solenoid valves in most voltages, pressures, sizes and materials of construction. You read more about ATEX Protection here...

Zone 0 and Zone 20 Category 1.
EN50014:1997+A1+A2 + EN50020:1994
ATEX II 2 G EEx ia IIC T6 or T4
1/8 and 1/4BSP 2/2 and 3/2 solenoid valves
ATEX EEx ia II C T4 and T6 24vdc coils
Media air Pressure 0 to 8 Bar.
Zone 0 Gas and Zone 20 Dust hazardous environments
Nass Magnet ATEX EexmIIT4 System 13/36 CoilATEX EexmIIT4 System 8/22 coil from Connexion 01454 334990Zone 1+2 and Zone 21+22 Category 2.
EN50014:1997+A1+A2
EN50028:1987
EN50271-1-1:1998
Atex II 2 G EEx m II T4 II 2 D IP65 T130C 

Zone 1 and Zone 21 Category 2.
Cenelec Standard 50018 EexdIICT6 Flame proof
 
Connexion offer an extensive range of ATEX EexdIICT2 to T6 Flame proof
Below Connexion Guide to Hazardous Areas.
 
 
 
Media
Port Size - Type
Port Option
N-open/closed
Min Pressure
Max Pressure
Body Material
Protection
Special Option

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Zone

Category

Presence of explosion atmospheres

Group II equipment

zone 0

category 1 G

Continuous, frequent
or for long periods

zone 20

category 1 D


zone 1

category 2 G

Intermittent
in normal operation (likely)

zone 21

category 2 D


zone 2

category 3 G

Occasional or for short periods
(never in normal operation)

zone 22

category 3 D

                                                       
Zones.
Hazardous areas for Group II are further divided into Zones,
these Zones relate to the predicted occurrence of when an Explosive Atmosphere may be present in the area.
These Zones are defined as being:
ColourZonesPresence of Gas
Red0Continuously present (During long periods)
Orange1Not Likely to be present (Regular service)
Yellow2Accidentally present (short time service never in regular service)

  

Colour

Zones

Presence of Dust

Red

20

Continuously present (During long periods)

Orange

21

Not Likely to be present (Regular service)

Yellow

22

Accidentally present (short time service never in regular service)

 

Types of ATEX Explosion Proof Protection Available from Connexion Developments Ltd

Protection
symbol
020121222

Description

Symbolic
Drawing
EexmIIT4
"m"
Cenelec
EN50028
 
Connexion Stock Item


X

X

X

X

Encapsulation.
Refers to a special casing in which the parts of an electrical apparatus
which could ignite an explosive atmosphere by either sparking or heating
are encapsulated in a compound in such a way that this explosive atmosphere cannot be ignited.
EexiaIICT6
"ia"
Cenelec
EN50020/39
 
Connexion Stock Item

X

X

X

X

X

X

Intrinsically Safe.
Refers to a circuit in which neither sparks or temperature can ignite an
explosive atmosphere. If generated under the service conditions specified
by the standard regulations (Normal and faulty operating conditions)
EexdIICT2 - 6
"d"
Cenelec
EN50018
 
Manufactured to Order


X

X

X

X

Flameproof enclosure.
Refers to an electrical apparatus whose explosive parts are enclosed
in an explosion proof casing. This casing will resist the pressure generated
by the internal explosion or an explosive mixture and will prevent the
explosion from penetrating to the ambient explosive atmosphere.









 
 Temperature Classes.
Group 1
Temperature <150 C or <450 C according to coal dust accumulation on equipment
Group II
Temperature Class for Gas (G)
Permissible surface temperature
of electrical equipment
T1
T2
T3
T4
T5
T6
450C
300C
200C
135C
100C
85C
 
Ignition Temperature for Dusts.
The dust ignition temperature depends on its consistency and its nature.
The ignition temperatures for various types of dust are available from reference tables. Connexion have a few common examples below.
Dusts
Ignition Temperature
Clouds
5mm layer
Aluminium
560C
>450C
Charcoal
520C
320C
Coal Dust (Lignite)
380C
225C
Cocoa
590C
250C
Coffee Grounds
580C
290C
Corn
530C
460C
Methyl cellulose
420C
320C
Paper Fibre
570C
335C
Phenolic Resin
530C
>450C
Polyethylene
440C
melts
PVC
700C
>450C
Sugar
490C
460C
Soot
810C
570C
Starch
460C
435C
Toner
520C
melts
Wheat
510C
300C

Fuel or Chemical

Temperature

(oC)

(oF)

Acetaldehyde

175

347

Acetone

465

869

Acetylene

305

581

Anthracite - glow point

600

1112

Benzene

560

1040

Bituminous coal - glow point

454

850

Butane

420

788

Carbon

700

1292

Carbon - bi sulfide

149

300

Carbon monoxide

609

1128

Charcoal

349

660

Coal-tar oil

580

1076

Coke

700

1292

Cyclohexane

245

473

Diethyl ether

160

320

Ethane

515

859

Ethylene

490

914

Ethyl Alcohol

365

689

Fuel Oil No.1

210

410

Fuel Oil No.2

256

494

Fuel Oil No.4

262

505

Heavy hydrocarbons

750

1382

Hydrogen

500

932

Gas oil

336

637

Gasoline

280

536

Gun Cotton

221

430

Kerosene

295

563

Isobutane

462

864

Isobutene

465

869

Isooctane

447

837

Isopentane

420

788

Isopropyl Alcohol

399

750

Light gas

600

1112

Light hydrocarbons

650

1202

Lignite - glow point

526

979

Methane (Natural Gas)

580

1076

Methyl Alcohol

385

725

Naphtha

550

1022

Neohexane

425

797

Neopentane

450

842

Nitro-glycerine

254

490

n-Butane

405

761

n-Heptane

215

419

n-Hexane

225

437

n-Octane

220

428

n-Pentane

260

500

n-Pentene

298

569

Oak Wood - dry

482

900

Peat

227

440

Petroleum

400

752

Pine Wood - dry

427

800

Phosphorous, amorphous

260

500

Phosphorous, transparent

49

120

Production gas

750

1382

Propane

480

842

Propylene

458

856

p-Xylene

530

986

Rifle Powder

288

550

Toluene

530

849

Semi anthracite coal

400

752

Semi bituminous coal - glow point

527

980

Styrene

490

914

Sulphur

243

470

Wood

300

572

Xylene

463

867

 
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