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Spool valve
Spool valve

Spool valve
NG3-Mini
Flange construction
◆ pneumatically operated
◆ 4/2-way impulse valve
◆ 4/3-way with spring centred mid position
◆ 4/2-way with spring reset
◆ Q = 8 l/min
max
◆ p = 350 bar
max

DESCRIPTION APPLICATION
Direct operated spool valve, pneumatically operated, with 4 Spool valves are mainly used for controlling direction of movement
connections in a 5 chamber system. Spool detented or with spring and stopping of hydraulic cylinders and motors. Miniature values
reset. Without actuation, the spool is held in the center position by are used where both, reduced dimensions and weight are import-

the spring (4/3), or switched back to the offset position (4/2). With ant.

the detent, the spool is held in the last switching position selected.
Precise spool fit, low leakage, long service life time. Spool made
from hardened steel, valve body from high quality hydraulic cast
steel.

SYMBOL

AB3 AB1 AB2
A B A B A B

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

ACB AC1 CB2
A B A B A B
a a 0 b b a a b b a a b b
P T P T P T

ADB AD1 DB2
A B A B A B
0 b a
a a b b a a b a b b
P T P T P T

GENERAL SPECIFICATIONS ACTUATION

Designation 4/2-, 4/3-spool valve Actuation Pneumatically operated
Construction Direct operated Execution Actuation CKIII
Mounting Flange construction Pilot pressure p V min = 2 bar at p = 20 bar
T
Nominal size NG3-Mini according to Wandfluh p V min = 5 bar at p =100 bar
T
standard Control volume V = 2 cm 3
Actuation Pneumatically operated
Ambient temperature -25…+70 °C
Weight 0.42 kg (1 actuation)
0.57 kg (2 actuations)
MTTFd 150 years

www.wandfluh.com Illustrations are not binding Data subject to change 1/3 Edition: 21 33 1.6-15 E
Page 281