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Pressure relief valve
Pressure relief valves Pressure relief valve

Pressure relief cartridge
CHARACTERISTICS Oil viscosity υ = 30 mm /s
2
p = f (Q) Pressure volume flow characteristics p = f (Q) Pressure volume flow characteristics Seat tight M22 x 1,5
(Maximal adjustable pressure) (Minimal adjustable pressure) ISO 7789
p [bar] p [bar] ◆ pilot operated
400 K0675 P N = 350 bar 20 K0676 ◆ p = 450 bar
max
◆ p N max = 420 bar
300 15
◆ Q = 100 l/min
max
200 10
P N = 160 bar
100 P N = 63 bar 5
DESCRIPTION APPLICATION
0 0 Pilot operated pressure relief valve in screw-in cartridge construc- These valves are used for limiting the operating pressure in the
0 20 40 60 80 Q [l/min] 0 20 40 60 80 Q [l/min]
p = f (n) Pressure adjustment characteristics ∆p = f (Q) Pressure volume flow characteristics tion for cavity according to ISO 7789. High flow capacity, very hydraulic system or for protection against pressure peaks. Can be

(at Q = 5 l/min) [control line x unpressurised circ. - bypass P (1) → T (2)] sensitively adjustable. If the pressure in P (1) exceeds the adjusted used in double pressure relief switches. The screw-in cartridge is
p [bar] p [bar] value of the valve, the excessive pressure is drained to T (2). The perfectly suitable for installation in control blocks and is installed in
400 K0113 20 K0677 back pressure at T (2) is added to the adjusted value. T (2) can be sandwich- (vertical stacked systems) and in flange plates (corres-
P N = 350 bar
300 15 charged up to the maximum. Hardened precision parts ensure ponding data sheets in this register). For machining the cartridge
virtually leakage-free closing. Rapid switching with low hysteresis cavity in steel and aluminum blocks, cavity tools are available (hire
200 10 and excellent stability over the whole flow range. or purchase). Please refer to the data sheets in register 2.13.
P (1) P N = 160 bar
100 P (1) P N = 63 bar 5
x (3) 0 0
0 1 x (3) 2 3 4 5 n [-] 0 20 40 60 80 Q [l/min]
T (2)
DIMENSIONS
Screw adjustment «S» T (2) Knob adjustment «D» SYMBOL ACTUATION
Actuation Adjustment spindle M8 x 1
ø 26 Cavity drawing to T (2)
Ø 17 ø 26 M22 x 1,5 ISO 7789–22–07–0–98 Execution S = blockable key adjustment
s4 30 Ø 17 20 20 M22 x 1,5 D = blockable knob adjustment
40 s4 30 Optionally:
40 K = lockable adjustment
s13 P (1) G = star handle adjustment
47,1 s13 54,6 (3) X → see Data sheet 2.0-50
s27 47,1 54,6 (3) X Actuation angle a = 1800 ° (5 rotations)
b
ø30 s27 (2) T Actuation stroke S = 5 mm
50 ø30 b
M22x1,5 50 (2) T
60 M22x1,5
x(3) 60 (1) P
54 54 70 x(3) (1) P TYPE CODE
T(2) 70 B C PM22 - - #
65 T(2) (1) P Pressure relief valve

P(1) 75 65 (1) P Pilot operated, seat tight
P(1) 75 For detailed cavity drawing and cavity
tools see data sheet 2.13-1007. Type of adjustment Key S
Control knob D
Cover A

Screw-in cartridge M22 x 1,5
PARTS LIST
Nominal pressure range p N 63 bar 63
Position Article Discription 160 bar 160
350 bar 350
20 114.2224 Knob 420 bar 420
30 193.1061 Safty plate RD6 DIN 6799
40 153.1402 Hexagon nut 0,5D M8x1 Sealing material NBR D1
FKM (Viton)

50 160.2188 O-ring ID 18,77x1,78
60 160.2156 O-ring ID 15,60 x 1,78 Design index (subject to change)
65 160.2120 O-ring ID 12,42 x 1,78 2.1-538
70 049.3196 Back-up ring RD 16,1 x 19 x 1,4
75 049.3157 Back-up ring RD 12,6 x 15,5 x 1,4 Technical explanation see data sheet 1.0-100

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 2.1-534E 2/2 www.wandfluh.com Illustrations are not binding Data subject to change 1/3 Edition: 18 41 2.1-538 E
CH-3714 Frutigen Edition 10 33
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