Page 304 - Softbound_Edition_19_en

Spool valve

Spool valve
NG6
Flange construction ISO 4401-03-03
◆ hydraulically operated
◆ 4/2-way impulse execution detented
◆ 4/3-way with spring centred mid position
◆ 4/2-way with spring reset
◆ Q =80 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

AB3 AB1 AB2
A B A B A B
x a b y x a b y x a b y
P T P T P T

ACB ACB* ACB*
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

ADB ADB* ADB*
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

* 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.

GENERAL SPECIFICATIONS ACTUATION

Designation 4/2-, 4/3-spool valve Actuation Hydraulically operated
Construction Direct operated Pilot pressure p = 15 bar
min
Mounting Flange construction p = 280 bar
max
Nominal size NG6 to ISO 4401-03-03 Control volume V = 0,34 cm 3
Actuation Hydraulically operated
Ambient temperature -25…+70 °C
Weight 1,1 kg
MTTFd 150 years

www.wandfluh.com Illustrations are not binding Data subject to change 1/3 Edition: 23 12 1.7-32 E