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Proportional pressure reducing valve
Proportional pressure reducing valve

PERFORMANCE SPECIFICATIONS
Oil viscosity u = 30 mm /s
2
p = f (Q) Pressure volume flow characteristics p = f (Q) Pressure volume flow characteristics
red
red
Maximal adjustable pressure Maximal adjustable pressure
25 bar execution 40 bar execution
*Limit of the operating range *Limit of the operating range
p [bar] p [bar]
30 K1145 60 K1144

20 40

10  ∗ 20  ∗

0 0
6 4 2 0 2 4 6 6 4 2 0 2 4 6
A  T Q [l/min] P  A A  T Q [l/min] P  A

p = f (n) Pressure adjustment characteristics p = f (n) Pressure adjustment characteristics
red
red
Measured at Q = 0 l/min (static) Measured at Q = 0 l/min (static)
25 bar execution 40 bar execution
**Slightly increased hysteresis **Slightly increased hysteresis
p [bar] p [bar]
30 K4148 L21 50 K4149 L21
25 40
20 L15 / L17 30 L15 / L17
15
10 20
5 ** 10 **
0 0
0 10 20 30 40 50 60 70 80 90 100 l [%] 0 10 20 30 40 50 60 70 80 90 100 l [%]

STANDARDS SURFACE TREATMENT
Cartridge cavity Wandfluh standard ◆ The cartridge body is gas-nitro carburised
Explosion protection Directive 2014 / 34 / EU (ATEX) ◆ The slip-on coil and the armature tube are zinc-nickel coated
Flameproof enclosure EN / IEC / UL 60079-1, 31
Cable entry EN 60079-0, 1, 7, 15, 31
Protection class EN 60 529
Contamination ISO 4406
efficiency

COMMISSIONING INSTALLATION NOTES
Attention! The solenoid coil must only be put into operation, if the Mounting type Screw-in cartridge type M16 x 1,5
requirements of the operating instructions supplied are
observed to their full extent. In case of non-observance, Mounting position Any, preferably horizontal
no liability can be assumed. Tightening torque M = 30 Nm screw-in cartridge
D
M = 9 Nm Knurled nut
D

www.wandfluh.com Illustrations are not binding Data subject to change 3/4 Edition: 21 21 2.3-602 E
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