Page 952 - Softbound_Edition_19_en

Proportional pressure relief valve

Proportional pressure relief cartridge
◆ pilot operated M22 x 1,5
◆ Q = 100 l/min ISO 7789
max
◆ p = 400 bar x II 2 G Ex db IIC T6, T4
max
◆ p = 350 bar
N 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 relief valve in screw-in These valves are suitable for applications in explosion-hazard
cartridge construction for cavity according to ISO 7789. High flow areas, open cast and also in mines. The electrical remote control in
capacity, very sensitively adjustable. When the operating pressure conjunction with process controls allows economical solutions
adjusted by means of the proportional solenoid is reached, the with repeatable processes. The screw-in cartridge is perfectly sui-
valve opens and connects the protected line with the drain to the table for installation in control blocks and is installed in sandwich-
tank. The back pressure in T (2) affects the pressure in P (1). For the (vertical stacked systems) and in flange plates (corresponding data
control, Wandfluh proportional amplifiers are available (see regis- sheets in this register). For machining the cartridge cavity in steel
ter 1.13). The pressure tight encapsulated Ex-protection solenoid and aluminum blocks, cavity tools are available (hire or purchase).
coil prevents an explosion on the inside penetrating to the outside Please refer to the data sheets in register 2.13.
as well as an ignitable surface temperature.

TYPE CODE
B V B PM22 - - / / - #
Pressure relief valve

Pilot operated
Proportional, explosion proof execution Ex d

Screw-in cartridge M22 x 1,5
Execution L9 L15 / L17
Nominal pressure range p [bar] 20 160 20 200
N
50 220 63 275
80 280 100 350

Nominal voltage U 12 VDC G12
N
24 VDC G24

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

Sealing material NBR
FKM (Viton) D1
Options without
amplifier M248
Design index (subject to change)
2.3-536

www.wandfluh.com Illustrations are not binding Data subject to change 1/4 Edition: 21 21 2.3-536 E