Page 272 - Softbound_Edition_19_en

Spool valve

Spool valve
NG10
Flange construction ISO 4401-05
◆ hand operated
◆ 4/3-way with spring centred mid position
◆ 4/2-way with spring reset
◆ 4/2- and 4/3-way detented
◆ Q = 100 l/min
max
◆ p = 350 bar
max

DESCRIPTION APPLICATION
Direct operated spool valve, hand operated with 4 connections in 5 Spool valves are mainly used for controlling direction of movement
chamber design. Spool detented or with spring. Without actuation, and stopping of hydraulic cylinders and motors. The direction of
the spool is held in the center position by the spring (4/3), or movement is determined by the position of the spool and its symbol.
switched back to the offset position (4/2). With the detent, the Manually or mechanically operated valves are particularly suitable
spool is held in the last switching position selected. Precise spool for use in installations where no electric current is available or for

fit, low leakage, long service life time. Spool made from hardened applications in explosion hazard areas.

steel, body from high quality hydraulic cast steel.

TYPE CODE
A H 4 / - #
International standard interface ISO

Hand lever

Number of control ports

Designation of symbols acc. to table Operation a-side …a
Operation b-side …b

Hand lever with spring reset or spring centred f
Hand lever dentented r
Sealing material NBR
FKM (Viton) D1
Design index (subject to change)
1.5-50

GENERAL SPECIFICATIONS HYDRAULIC SPECIFICATIONS
Designation 4/2-, 4/3-spool valve Working pressure p = 350 bar
max
Construction Direct operated Tank pressure p T max = 100 bar
Mounting Flange construction Maximum volume flow Q = 100 l/min, see characteristics
max
Nominal size NG10 according to ISO 4401-05
Actuation Hand operated Leakage oil See characteristics
Ambient temperature -25…+70 °C (NBR) Fluid Mineral oil, other fluid on request
-20…+70 °C (FKM) Viscosity range 12 mm /s…320 mm /s
2
2
Weight 3,7 kg Temperature range -25…+70 °C
fluid
Contamination Class 20 / 18 / 14
efficiency
Filtration Required filtration grade ß 10…16 ≥ 75,
see data sheet 1.0-50

www.wandfluh.com Illustrations are not binding Data subject to change 1/4 Edition: 16 33 1.5-50 E