Page 830 - Softbound_Edition_19_en

Pressure relief valve
Pressure relief valve Pressure relief valve

GENERAL SPECIFICATIONS HYDRAULIC SPECIFICATIONS HYDRAULIC CONNECTION PARTS LIST
Designation Pressure relief valve Working pressure p = 450 bar Cavity drawing according to ISO 7789–22–02–0–98 Position Article Description
max
Construction Direct operated Tank pressure p = 210 bar 10 160.2188 O-ring ID 18,77 x 1,78 (NBR)
T max
Mounting Screw-in cartridge construction Nominal pressure p = 63; 420 bar M22x1.5 160.6188 O-ring ID 18,77 x 1,78 (FKM)
N
Nominal size M22 x 1,5 according to ISO 7789 range 20 160.2140 O-ring ID 14,00 x 1,78 (NBR)
Actuation Manually Minimum pressure See characteristics 160.6141 O-ring ID 14,00 x 1,78 (FKM)
Ambient temperature -25…+90 °C Volume flow range Q = 0,1…50 l/min (2) 30 049.3177 Back-up ring rd 14,6 x 17,5 x 1,4
Weight 0,30 kg p = 420 bar Leakage oil Seat tight, max. 0,15 ml / min (approx. 3
N
0,24 kg p = 63 bar drops / min) at 30 cSt (1)
N
MTTFd 150 years Fluid Mineral oil, other fluid on request SURFACE TREATMENT
Viscosity range 12 mm /s…320 mm /s (1) ◆ The cartridge body is zinc-nickel coated
2
2
Temperature range -25…+90 °C (NBR)
fluid -20…+90 °C (FKM) Note! For detailed cavity drawing and cavity tools see data
Contamination Class 18 / 16 / 13 sheet 2.13-1003 SEALING MATERIAL
efficiency NBR or FKM (Viton) as standard, choice in the type code
Filtration Required filtration grade ß 6…10 ≥ 75,
see data sheet 1.0-50
ACCESSORIES INSTALLATION NOTES
PERFORMANCE SPECIFICATIONS
Oil viscosity u = 30 mm /s Flange body / sandwich plate Data sheet 2.1-620 Mounting type Screw-in cartridge M22 x 1,5
2
NG4-Mini Mounting position Any
p = f (Q) Pressure volume flow characteristics p = f (Q) Pressure volume flow characteristics Flange body / sandwich plate NG6 Data sheet 2.1-640 Tightening torque M = 60 Nm Screw-in cartridge
Maximal adjustable pressure Minimal adjustable pressure D
Flange body / sandwich plate NG10 Data sheet 2.1-660
p [bar] p [bar]
500 K4056 60 K4057 Threaded body Data sheet 2.9-200 STANDARDS
400 50 Technical explanations Data sheet 1.0-100 Cartridge cavity ISO 7789
40 Hydraulic fluids Data sheet 1.0-50
300 Contamination ISO 4406
30
200 20 Filtration Data sheet 1.0-50 efficiency
100 10
0 0
0 10 20 30 40 50 Q [l/min] 0 10 20 30 40 50 Q [l/min]

DIMENSIONS
BESPM22-420 BESPM22-63

50

70

60

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 44 2.1-539 E www.wandfluh.com Illustrations are not binding Data subject to change 3/3 Edition: 18 44 2.1-539 E
Page 830