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EXPLOSION PROTECTION SPECIAL VALVES

CORROSION PROTECTION Wandfluh valves are constructed in a modular way and are thus very flexible in their

composition. This allows different standard functional elements to be combined, so that
Flammable gases, vapours and dust can form an explosive atmosphere when mixed with individual solutions can be easily realised.
oxygen. In order to ensure a high level of safety, appropriate protective regulations exist
for the various operating equipment to avoid the risk of explosion hazards. The solenoid
as an electrical actuation in the valve technology must therefore demonstrate a type of POPPET VALVES WITH DETENT FUNCTION CHARACTERISTICS
protection that is in line with the explosion protection standard. AEXD3206RR The practically leakage-free poppet valve spool can be opened
Valves that are exposed to continuous contact with salty water and atmospheres that or closed against the applied spring pressure and mechani-
cally detented in the desired position by an electrical impulse.
contain salt or to harsh weather conditions demand enhanced corrosion protection in FEATURES
order to prolong their service life. • 3-way function

• Electrical actuation with standard or Ex d solenoids
• Combination of an electrical actuation with a mechanical
actuation possible
EXPLOSION PROTECTION CORROSION PROTECTION • Spool position monitored with position sensor
Description K8: 500 - 1000 h salt spray test • Pressure max. 350 bar
• Electrical operating equipment for all explosion hazard • Zinc-nickel coating, or made of stainless materials. • Flow max. 40 l/min
zones a A b
• Solutions for valves and systems K9: > 1000 h salt spray test a P T b
• Optionally enhanced corrosion protection up to stainless • Mainly made of stainless and acid-resistant steel AISI
steel executions 316L. The solenoids are zinc-nickel coated.

Functions K10: > 1000 h salt spray test
• Solenoid spool valves • All elements made of stainless materials (AISI 316L) or VALVES WITH SWITCHING POSITION MONITORING CHARACTERISTICS
WDMFA_Z
• Solenoid poppet valves coated with stainless materials. Electronic sensors detect the switching position of the valve
spool. The evaluation of the command/feedback signals con-
• Proportional spool valves siderably increases the safety of an installation.
• Proportional pressure valves (relief and reducing) LOW TEMPERATURES

• Proportional flow valves (throttle and flow control) Z604: -40° C FEATURES

• For various spool and poppet valves
• Electronics integrated into the valve for proportional • Adapted sealing, adjustment tolerances partly adapted
functions • In combination with standard and Ex d solenoids
• Inductive switching sensor
Z591: -60° C • Pressure max. 350 bar
Features
• Type of protection flameproof enclosure (Ex d) for zone 1 • Special materials, special sealings, adjustment tolerances A B • Flow max. 160 l/min

and 2 enhanced a b • Nominal sizes NG6, NG10
a b
• Type of protection intrinsic safety (Ex i) for zone 0 P T

• Certified solenoids for surface and mining areas

• Certificates for ATEX, IECEx, EAC, UL/CSA, Australia, MA
SEAT TIGHT PRESSURE CONTROLLERS MSDPM22 CHARACTERISTICS
Controls the set output pressure independently of the volume
flow and closes seat tight. This leads to a significant reduction

of losses in a hydraulic system.
FEATURES
• Manual adjustment of the output pressure
• Good pressure control in case of volume fl ow fl uctuations
• Seat tight
• Pressure max. 350 bar
(A) 1
• Flow max. 20 l/min
• Cartridge with cavity M22x1,5
(P) 2

WANDFLUH ENERGY | PRODUCTS | SPECIAL VALVES | PAGE 9