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Pressure relief valve
Pressure relief valve Pressure relief valve

GENERAL SPECIFICATIONS HYDRAULIC SPECIFICATIONS DIMENSIONS
Designation Pressure relief valve Working pressure p = 400 bar Key adjustment «S» Control knob adjustment «D»
max
Construction Pilot operated Tank pressure p p + 20 bar
T max P
Mounting Screw-in cartridge construction Nominal pressure p = 63; 160; 350 bar
N
Nominal size M22 x 1,5 according to ISO 7789 range 30
Actuation Manually Minimum pressure See characteristics 40
Ambient temperature -25…+90 °C Volume flow range Q = 0,2…100 l/min 20
Weight 0,15 kg key adjustment Leakage oil See characteristics
0,16 kg control knob adjustment Fluid Mineral oil, other fluid on request
0,21 kg cover Viscosity range 12 mm /s…320 mm /s
2
2
MTTFd 150 years Temperature range -25…+90 °C (NBR)
fluid -20…+90 °C (FKM) 50
Contamination Class 18 / 16 / 13
efficiency
Filtration Required filtration grade ß 6…10 ≥ 75, 60
see data sheet 1.0-50
PERFORMANCE SPECIFICATIONS 70
Oil viscosity u = 30 mm /s
2
p = f (Q) Pressure volume flow characteristics p = f (Q) Pressure volume flow characteristics Cover «A» HYDRAULIC CONNECTION
Maximal adjustable pressure Minimal adjustable pressure Cavity drawing according to ISO 7789–22–02–0–98

p [bar] p [bar]
400 K0669 P N = 350 bar 40 K0670 M22x1.5
P N = 160/350 bar
300 30
25
200 P N = 160 bar 20 P N = 63 bar (2)
100 P N = 63 bar 10
(1)
0 0
0 25 50 75 100 Q [l/min] 0 25 50 75 100 Q [l/min]
(1)

p = f (n) Pressure adjustment characteristics Q = f (p) Leakage volume flow characteristics Note! For detailed cavity drawing and cavity tools see data
L
Measured at Q = 5 l/min P (1) → T (2) sheet 2.13-1003
p [bar] Q [cm /min]
3
400 K0113 200 K0114
P N = 350 bar
300 150 ACCESSORIES PARTS LIST
Pressure relief valve Position Article Description
200 100
P N = 160 bar Flange body / sandwich plate NG4-Mini Data sheet 2.1-620 20 114.2224 Control knob
100 50
P N = 63 bar Flange body / sandwich plate NG6 Data sheet 2.1-640 25 032.0611 Cover rd 23 / 3 x 35
0 0 Flange body / sandwich plate NG10 Data sheet 2.1-660 30 193.1061 Retainer rd 6 DIN 6799
0 1 2 3 4 5 n [-] 0 50 100 150 200 250 300 350 p [bar]
Back pressure valve 40 153.1402 Hexagon nut 0,5d M8 x 1

Sandwich plate NG4-Mini Data sheet 2.1-720 50 160.2188 O-ring ID 18,77 x 1,78 (NBR)
Sandwich plate NG6 Data sheet 2.1-740 160.6188 O-ring ID 18,77 x 1,78 (FKM)
SEALING MATERIAL SURFACE TREATMENT 60 160.2140 O-ring ID 14,00 x 1,78 (NBR)
NBR or FKM (Viton) as standard, choice in the type code ◆ The cartridge body is zinc-nickel coated Sandwich plate NG10 Data sheet 2.1-760 160.6141 O-ring ID 14,00 x 1,78 (FKM)
◆ The control knob is made of plastic 70 049.3177 Back-up ring rd 14,6 x 17,5 x 1,4
Types of adjustment for screw-in Data sheet 2.0-50
STANDARDS INSTALLATION NOTES cartridges
Threaded body Data sheet 2.9-200
Cartridge cavity ISO 7789 Mounting type Screw-in cartridge M22 x 1,5
Contamination ISO 4406 Mounting position Any, preferably horizontal Technical explanations Data sheet 1.0-100
efficiency Tightening torque M = 60 Nm Screw-in cartridge Hydraulic fluids Data sheet 1.0-50
D
Filtration Data sheet 1.0-50
Wandfluh AG Postfach CH-3714 Frutigen
Tel. +41 33 672 72 72 Fax +41 33 672 72 12 sales@wandfluh.com

www.wandfluh.com Illustrations are not binding Data subject to change 2/3 Edition: 18 40 2.1-530 E www.wandfluh.com Illustrations are not binding Data subject to change 3/3 Edition: 18 40 2.1-530 E
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