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Proportional pressure reducing valve
Proportional pressure reducing valve

Proportional pressure reducing cartridge
◆ pilot operated M22 x 1,5
◆ Q = 40 l/min ISO 7789
max
◆ p = 400 bar x II 2 G Ex db IIC T6, T4
max
◆ p = 350 bar
N red max
x II 2 D Ex tb III C T80 °C, T130 °C
x I M2 Ex db I Mb
Class I Division 1
Class I Zone 1

DESCRIPTION APPLICATION
Pilot operated proportional pressure reducing valve in screw-in These valves are suitable for applications in explosion-hazard
cartridge construction for cavity according to ISO 7789. Proportio- areas, open cast and also in mines. The electrical remote control in
nally to the solenoid current, the solenoid force and the pressure in conjunction with process controls allows economical solutions
port A (1) rise. The valve functions practically independently of the with repeatable processes. The screw-in cartridge is perfectly sui-
pressure in port P (2). Pressure increase in the consumer port A (1) table for installation in control blocks and is installed in sandwich-
to above the adjusted value, e.g. through an active consumer, is (vertical stacked systems) and in flange plates (corresponding data
avoided by discharging excess oil to the tank T (3). With the sole- sheets in this register). For machining the cartridge cavity in steel
noid deenergised, the oil flows freely from consumer port A (1) to and aluminum blocks, cavity tools are available (hire or purchase).
port T (3). For the control, Wandfluh proportional amplifiers are Please refer to the data sheets in register 2.13.
available (see register 1.13). The pressure tight encapsulated
Ex-protection solenoid coil prevents an explosion on the inside
penetrating to the outside as well as an ignitable surface tempera-
ture.

SYMBOL CERTIFICATES
Surface Mining Standard M248
(A) 1 -25 °C Electronic
to…
ATEX x x x x
IECEx x x x x
(P) 2 (T) 3
CCC x x x x
EAC x x x x
Australia x x x
MA x x x
UL / CSA x x
The certificates can be found on www.wandfluh.com

GENERAL SPECIFICATIONS ACTUATION
Designation Proportional pressure reducing valve Actuation Proportional solenoid, wet pin push
Construction Pilot operated type, pressure tight
Mounting Screw-in cartridge construction Execution MKY45 / 18x60 (data sheet 1.1-183)
Nominal size M22 x 1,5 according to ISO 7789 MKU45 / 18x60 (data sheet 1.1-184)
Actuation Proportional solenoid Connection Cable gland for cable Ø 6,5…14 mm
Ambient temperature Operation as T4 Attention! The UL execution is always supplied without cable
-25…+70 °C (L15 / L17) gland
Weight 2,2 kg
MTTFd 150 years

www.wandfluh.com Illustrations are not binding Data subject to change 1/4 Edition: 21 21 2.3-644 E
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