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PRESSURE RELIEF VALVES



Ex-proof pressure relief valves equipped with a solenoid pilot valve for venting or multiple pressure selections, certified for safe operation in hazardous environments with a potentially explosive atmosphere.

  • Multicertification ATEX, IECEx, EAC, and PESO for gas group II 2G and dust category II 2D
  • Multicertification ATEX and IECEx for gas group I M2 (mining)
  • cULus North American certification for gas group C&D 

The flameproof enclosure of the solenoid prevents the propagation of accidental sparks or fire to the external environment. The solenoid designed to limit the surface's temperature within the classified limits.

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Pressure relief valves equipped with a solenoid pilot valve for venting or multiple pressure selections, certified for safe operation in hazardous environments with a potentially explosive atmosphere.

  • Certifications: ATEX or IECExII 1G Ex ia IIC, IIB, IIA surface zone 0, 1, and 2
  • Certifications: ATEX or IECExIM2 Ex ia IMb, Ex ib IMb surface, tunnels, or mining plants

The valves electrically powered through specific "safety barriers" limiting the maximum current supplied to the solenoid. 

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New line of directional solenoid, and pressure relief valves from stainless steel, for operation in corrosive environments. Ex-proof stainless steel solenoids, with ATEX, IECEx, EAC multi certification, or North American cULus certification, for hazardous areas.

X - stainless steel for external and internal parts, to withstand extreme and corrosive environmental conditions, and to ensure full compatibility, with a water-based and special fluids.
XS - external parts from stainless steel to withstand extreme and corrosive environmental conditions. Integral components derived from standard valves.

Directional valves are available in two basic versions: poppet type, 3-way leak-free (suitable for accumulator systems), or spool-type, 4-way on-off valves. DHAX(S) and DLAHX(S) valves are in SIL compliance with IEC 61508 (TÜV certification).

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