Page 1033 - Softbound_Edition_19_en

Proportional pressure reducing valve
Proportional pressure reducing valve

Proportional pressure reducing cartridge
◆ direct operated by means of pilot spool M22 x 1,5
◆ Q = 20 l/min ISO 7789
max
◆ p = 350 bar x II 2 G Ex db IIC T6, T4
max
◆ p = 200 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

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

TYPE CODE
M P B PM22 - - / / - #
Pressure reducing valve

Direct operated by means of pilot spool
Proportional, explosion proof execution Ex d

Screw-in cartridge M22 x 1,5
Execution L9 L15 / L17
Nominal pressure range p [bar] 20 115 20 135
N
80 200 95 235
Nominal voltage U 12 VDC G12
N
24 VDC G24

Ambient temperature up to:
Nominal power P N 9 W L9 40 °C or 90 °C
15 W L15 70 °C
17 W L17 70 °C (only UL / CSA)
Certification ATEX, IECEx, EAC,
CCC UL / CSA UL
Australia AU MA (nur L15) MA
Sealing material NBR
FKM (Viton) D1

Options without
amplifier M248

Design index (subject to change)
2.3-627

www.wandfluh.com Illustrations are not binding Data subject to change 1/4 Edition: 21 21 2.3-627 E
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