Page 313 - Softbound_Edition_19_en

Spool valve
Spool valve

Spool valve
NG10
Flange construction ISO 4401-05
◆ hydraulically operated
◆ 4/2-way impulse execution detented
◆ 4/3-way with spring centred mid position
◆ 4/2-way with spring reset
◆ Q =160 l/min
max
◆ p = 350 bar
max

DESCRIPTION APPLICATION
Direct operated spool valve hydraulically operated via pilot port Spool valves are mainly used for controlling direction of movement

with 4 connections in a 5 chamber system. Spool detented or with and stopping of hydraulic cylinders and motors.

spring reset. Without actuation, the spool is held in the center posi-
tion by the spring (4/3), or switched back to the offset position (4/2).
With the detent, the spool is held in the last switching position

selected.
SYMBOL

BA3 BA1 BA2
A B A B A B
x a b y x a b y x a b y
P T P T P T

BCA BCA* BCA*
A B A B A B

x a 0 b y x a b y x a b y
P T P T P T

BDA BDA* BDA*
A B A B A B
0 b a
x a b y x a y x b y
P T P T P T

BEA BEA* BEA*
A B A B A B

x a 0 b y x a b y x a b y
P T P T P T

* These 4/2-way valves with spring reset are being delivered as 4/3-way valves.
Note! When the pilot ports are not actuated (without
pressure), or not needed, the leakage oil must be
discharged.

www.wandfluh.com Illustrations are not binding Data subject to change 1/4 Edition: 22 09 1.7-42 E
Page 313