Intrinsically safe valves

Electrically controlled, intrinsically safe directional control valves are intended to regulate the direction of hydraulic fluid (oil) flow in hydraulic systems which require to be powered with intrinsically safe circuits, unable to cause an ignition in an environment with potentially explosive atmosphere for group I or II, by creating a spark or thermal effect. To provide a distinction from the standard hydraulic equipment, the “I” letter, preceding the product type was introduced.

The valves are ATEX certified for intrinsically safe applications and can be used with an intrinsically safe circuit “ia” or “ib” of a power pack unit, suitable for the proper explosion group of a gas (max. parameters: Ui = 15 V, Ii = 1,6 A). For some of the elements (for the II group of equipment), the intrinsically safe power unit should have a power limit Pi, in compliance with the technical pecification table.

The intrinsically safe valves are intended (among other applications), for hydraulic systems which require to be powered withintrinsically safe circuits:

  • in underground part of mines and in some of their installations at the surface (certificate I M1 Ex ia I Ma), exposed to methane and/or coal dust explosion
  • in equipment and devices working near the flammable materials, such as: gases, vapours, mists, in compliance to the proper list mentioned in the ATEX standard specification (certificates II 2G Ex ia IIB T4 Gb or II 2G Ex ia IIC T6/T5 Gb)
Type Description Size Pressure
(MPa)
Flow
(dm3/min.)
Catalogue card Details
IWE6

intrinsically safe directional control valves for subplate mounting

6 up to 31,5 up to 20 WK 499 775 Details
IWE6-SO495

intrinsically safe directional control valves for subplate mounting – special version

6 up to 31,5 up to 20 WK 499 775 Details
2IRED6

2-way intrinsically safe, cartridge directional control valves

6 up to 31,5 up to 20 WK 499 424 Details
2IRES

2-way, unilateral, cartridge intrinsically safe valves

6 up to 31,5 up to 30 WK 499 425 Details
10 up to 31,5 up to 60 WK 425 280 Details
3IREH2

3-way intrinsically safe directional control valves

2 up to 31,5 up to 1,3 WK 499 415 Details
3IREH6

3-way intrinsically safe cartridge directional control valves

6 up to 31,5 up to 20 WK 499 296 Details
IWZCDE4

intrinsically safe, electrically controlled, proportional pressure reducing/relief cartridge valves

4 up to 21 up to 3 WK 423 580 Details
IWZP(P, S, G)E10

10 do 30 do 200 WK 425 640 Details