Page 836 - Softbound_Edition_19_en

Pressure relief valves

Pressure relief valve
screw-in cartridge
• Direct operated M22x1,5
• Q max = 100 l/min ISO 7789
• p max = 100 bar
• p = 32 bar
nmax
DescRiPtion Function aPPlication
Directly operated pressure relief valve in screw- The adjustment mechanism keeps the control For hydraulic systems with low operating
in cartridge construction with M22x1,5 thread spool in its end position by means of a coil pres-sures and high volume flows to limit the
for cavity acc. to ISO 7789. The valve is avai- spring. When the set operating pressure has operating pressure by diverting the flow of the
lable with two different types of adjustment: key been reached, the main spool opens and con- oil from the protected line P (1) to the outlet/
adjustment «S» and control knob adjustment nects the protected line with the return to the tank line T ( 2). The screw cartridges are very
«D». Key adjustment «S» is also available with tank. This means that the pressure occurring in well suited for installation in control blocks and
cover, see data sheet 2.0-50. One pressure P is relieved to T until the spring force returns are installed as a functioning part in Wandfluh
stage, 32 bar, is available as standard. The the valve spool to its end position. hydraulics NG4, NG6 and NG10 sandwich
cartridge body made of steel is galvanized and plates (vertical stacking) and flange valves
therefore rust-protected. (please see separate data sheets in register
2.1). Cavity tools are available (for hire or
purchase) for the manufacture of cartridge
cavities in steel or aluminium blocks. See data
sheets in register 2.13.
Attention: Should therefore not be utilized any-
more in applications with periodically changing
direction of flow.

tYPe coDe
B K PM22 - 32 #
Pressure relief valve

Direct operated,control spool

Type of adjustment Key S
Control knob D
Cover A (see data sheet 2.0-50)
Screw cartridge M22x1,5
Pressure range p 32 bar
N
Design-Index (Subject to change)

GeneRal chaRacteRistics hYDRaulic chaRacteRistics
Description Directly operated pressure relief valve Hydraulic fluid Mineral oils, other fluids on request
Construction Screw-in cartridge for cavity acc. to ISO 7789 Max permissible ISO 4406:1999, class 18/16/13
Type of fixture M22x1.5 screw thread contamination level (recommended filter gauge ß 6…10≥75)
Ambient temperature -20…+50 °C see data sheet 1.0-50/2
Installation position any Viscosity range 12 mm /s…320 mm /s
2
2
Tightening torque M = 50 Nm Hydraulic fluid temp. -20…+70 °C
D
Weigth m = 0,18 kg (key) Peak pressure p max = 100 bar
m = 0,19 kg (control knob) p Tmax = p +20 bar
P
Rated pressure stage p = 32 bar
N
Minimum pressure see curve
Volume flow Q = 0,2…100 l/min
Leak volume flow see curve
sYMBol Mechanical actuation
Mechanical types of operation in 2 different versions:
S = Screw adjustment
P(1) with fork wrench and Allen key
D = Control knob adjustment, fixed
Actuation stroke S = 7 mm
b
Actuation angle α = 2520° (7 revolutions)
b
T(2)
Wandfluh AG Tel. +41 33 672 72 72 E-mail: sales@wandfluh.com Illustrations not obligatory Data sheet no.
Postfach Fax +41 33 672 72 12 Internet: www.wandfluh.com Data subject to change 2.1-542E 1/2
CH-3714 Frutigen Edition 11 18

Ø 26
Ø 17
20
s4
30
40

s13
57
49,5
s27
ø30 95,4
50
M22x1,5

38,4
60

70