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Pressure relief valve
Pressure relief valve

Pressure relief cartridge
M22 x 1,5
Leakage-free ISO 7789
◆ direct operated
◆ p = 450 bar
max
◆ p N max = 420 bar
◆ Q = 50 l/min
max

DESCRIPTION APPLICATION
Direct operated poppet type pressure relief valve in screw-in These valves are used for limiting the operating pressure in the

cartridge construction for cavity according to ISO 7789The valve is hydraulic system. Can be used in double pressure relief switches.
closed in the neutral position. If the pressure in P (1) exceeds the For machining the cartridge cavity in steel and aluminum blocks,
adjusted value of the valve, the excessive pressure is drained to T cavity tools are available (hire or purchase). Please refer to the

(2). The back pressure at T (2) is added to the adjusted value. T (2) data sheets in register 2.13.

can be charged up to the maximum. Hardened precision parts en-
sure virtually leakage-free closing. Rapid switching with low hyste-
resis and excellent stability over the whole flow range.

SYMBOL ACTUATION
Actuation Adjustment spindle M12 x 1
(T) 2 Execution S = blockable key adjustment
Actuation angle a = 1800 ° (5 rotations)
b
Actuation stroke S = 5 mm
b
(P) 1

TYPE CODE
B E S PM22 - - #
Pressure relief valve
Direct operated, leackage-free
Type of adjustment Key

Screw-in cartridge M22 x 1,5

Nominal pressure range p N 63 bar 63
420 bar 420
Sealing material NBR
FKM (Viton) D1
NBR 872 Z604
Design index (subject to change)
2.1-539

www.wandfluh.com Illustrations are not binding Data subject to change 1/3 Edition: 18 44 2.1-539 E
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