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Pressure relief valve
Pressure relief valve

Pressure relief cartridge
◆ direct operated M22 x 1,5
◆ p = 400 bar ISO 7789
max
◆ p N max = 350 bar
◆ Q = 25 l/min
max

DESCRIPTION APPLICATION
Direct operated poppet type pressure relief valve as screw-in These valves are used for limiting the operating pressure in the
cartridge for cavity according to ISO 7789. The valve is closed in hydraulic system. The screw-in cartridge is perfectly suitable for
the neutral position. If the pressure in P (1) exceeds the adjusted installation in control blocks and is installed in sandwich- (vertical
value of the valve, the excessive pressure is drained to T (2). stacked systems) and in flange plates (corresponding data sheets
Changing back pressure at T (2) influences the adjusted value. in this register). For machining the cartridge cavity in steel and
Hardened precision parts ensure virtually leakage-free closing. aluminum blocks, cavity tools are available (hire or purchase).
The hydraulically damped poppet spool provides excellent stability Please refer to the data sheets in register 2.13.

over the entire flow range.
Attention! Not to be used in applications with periodically
changing flow direction.

SYMBOL ACTUATION
Actuation S = lockable key adjustment
(T) 2 D = Lockable knob adjustment
Execution Adjustment spindle M8 x 1
Actuation angle a = 1800° (5 rotations)
b
a = 1400° p = 210 bar
b
N
(P) 1 Actuation stroke S = 5 mm
b
S = 4 mm p = 210 bar
b N

TYPE CODE
B A PM22 - - #
Pressure relief valve

Directly operated, poppet spool
Type of adjustment Key S
Control knob D
Cover A
Screw-in cartridge M22 x 1,5

Nominal pressure range p N 63 bar 63 315 bar 315
210 bar 210 350 bar 350

Sealing material NBR
FKM (Viton) D1
NBR 872 Z604

Design index (subject to change)
2.1-540

www.wandfluh.com Illustrations are not binding Data subject to change 1/3 Edition: 20 48 2.1-540 E
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