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Proportional spool valve
Proportional spool valve

HYDRAULIC SPECIFICATIONS STANDARDS
Working pressure p = 350 bar Explosion protection Directive 2014 / 34 / EU (ATEX)
max
Tank pressure p = 160 bar Flameproof enclosure EN / IEC / UL 60079-1, 31
T max
Maximum volume flow Q = 30 l/min, see characteristics Cable entry EN 60079-0, 1, 7, 15, 31
max
Nominal volume flow Q = 6 l/min, 12 l/min, 20 l/min (L15 / L17) Mounting interface ISO 4401-03
N
Q = 3 l/min, 7 l/min, 14 l/min (L9 ACB-S) Protection class EN 60 529
N
Q = 5 l/min, 10 l/min, 16 l/min (L9 Contamination efficiency ISO 4406
N
ADB-V)
Leakage oil On request
Hysteresis L15 / 70°C: ≤ 10 % at optimal dither
signal
L9 / 40°C: ≤ 12 % at optimal dither signal SURFACE TREATMENT
L9 / 90°C: ≤ 14 % at optimal dither signal
◆ The valve body, the cover and the socket head screws are made
Fluid Mineral oil, other fluid on request of stainless steel
Viscosity range 12 mm /s…320 mm /s ◆ The slip-on coil and the armature tube are zinc nickel coated
2
2
Temperature range Operation as T6
fluid NBR -25…+40 °C (L9)
FKM -20…+40 °C (L9)
Operation as T4
NBR -25…+70 °C (L9 or L15 / L17) SEALING MATERIAL
FKM -20…+70 °C (L9 or L15 / L17) NBR or FKM (Viton) as standard, choice in the type code
Contamination Class 18 / 16 / 13
efficiency
Filtration Required filtration grade ß 6…10 ≥ 75,
see data sheet 1.0-50

Attention! With the execution L9 for ambient temperatures up to 90
°C (L9/90 °C), Q is not reached
N

PERFORMANCE SPECIFICATIONS
Oil viscosity u = 30 mm /s
2
Q = f (p) Volume flow pressure characteristics Q = f (p) Volume flow pressure characteristics
I = I G I = I G
Measured at 50 °C Measured at 50 °C
ACB-S, AC1-S, CB2-S ACB-S, AC1-S, CB2-S
Execution L15 / L17 Execution L9
Q [l/min] Q [l/min]
30 K4223 30 K4224
25 Q N = 20 l/min 25
20 20 Q N = 14 l/min
15 Q N = 12 l/min 15
10 Q N = 6 l/min 10 Q N = 7 l/min
5 5 Q N = 3 l/min
0 0
0 50 100 150 200 250 300 350 p [bar] 0 50 100 150 200 250 300 350 p [bar]

www.wandfluh.com Illustrations are not binding Data subject to change 3/6 Edition: 21 18 1.10-88S E
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