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Proportional spool valve
Proportional spool valve

Proportional spool valve
NG4-Mini
Flange construction Wandfluh standard
◆ Q = 20 l/min
max
◆ 3 volume flow levels
◆ Q N max = 12 l/min
◆ p = 350 bar
max

DESCRIPTION APPLICATION
Direct operated proportional spool valve with 4 connections in Proportional spool valves are perfectly suitable for demanding
5-chamber system. Precise spool fit, low leakage, long service tasks due to the high resolution, large volume flow and low hystere-
life time. The volume flow adjustment takes place by a Wandfluh sis. The applications are in the industry as well as in the mobile hy-
proportional solenoid. Proportional to the solenoid current, the draulics for the smooth control of hydraulic actuators. Some ex-
spool stroke, the spool opening and the valve volume flow amples: rotor blades control of wind generators, forestry and earth
increase. For the control, Wandfluh proportional amplifiers are moving machines, machine tools and paper production machines
available (see register 1.13). with simple position control, robotics and fan control. Miniature

values are used where both, reduced dimensions and weight are
important.

SYMBOL
Symmetrical control
ACB-S AC1-S CB2-S
A B A B A B

a 0 b a b
a b a b a b
P T P T P T

Meter-in control
ACB-V AC1-V CB2-V

A B A B A B
a 0 b a b
a b a b a b
P T P T P T

Meter-in control
ADB-V AD1-V DB2-V

A B A B A B
a b a b
a b a b a b
P T P T P T

Meter-out control
ACB-R AC1-R CB2-R
A B A B A B

a 0 b a b
a b a b a b
P T P T P T

www.wandfluh.com Illustrations are not binding Data subject to change 1/5 Edition: 17 35 1.10-73 E
Page 355