Page 257 - Softbound_Edition_19_en

Spool valve
Spool valve

Spool valve
NG4-Mini
Flange construction Wandfluh standard
◆ roller operated
◆ 4/2-way with spring reset
◆ Q = 30 l/min
max
◆ p = 350 bar
max

DESCRIPTION APPLICATION
Direct operated valve, roller operated with 4 connections in 5 Spool valves are mainly used for controlling direction of movement
chamber design. Without actuation, the spool is switched back to and stopping of hydraulic cylinders and motors. Manually or

the offset position. mechanically operated valves are particularly suitable for use in
installations where no electric current is available or for appli-

cations in explosion hazard areas.

TYPE CODE
WD T F A04 - - #
Spool valve, direct operated
Roller with spring reset

Flange construction
Mounting interface according to Wandfluh standard, NG4-Mini

Designation of symbols acc. to table Operation a-side …1
Operation b-side …2

Sealing material NBR
FKM (Viton) D1
NBR 872 y-Z604
Design index (subject to change)
1.5-46

GENERAL SPECIFICATIONS HYDRAULIC SPECIFICATIONS
Designation 4/2-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 = 30 l/min, see characteristics
max
Nominal size NG4-Mini according to Wandfluh Leakage oil See characteristics
standard Fluid Mineral oil, other fluid on request
Actuation Roller actuated Viscosity range 12 mm /s…320 mm /s
2
2
Ambient temperature -25…+70 °C Temperature range -25…+70 °C (NBR)
Weight 0,76 kg fluid -20…+70 °C (FKM)
MTTFd 150 years Contamination Class 20 / 18 / 14
efficiency
Filtration Required filtration grade ß 10…16 ≥ 75,
ACTUATION see data sheet 1.0-50
Actuation Roller
Actuation stroke s = 2 mm
Actuation force F = 110 - 135 N at p
b T max

www.wandfluh.com Illustrations are not binding Data subject to change 1/3 Edition: 19 23 1.5-26 E
Page 257