Page 249 - Softbound_Edition_19_en

Spool valve
Spool valve

Spool valve
NG3-Mini
Flange construction
◆ roller operated
◆ 4/2-way with spring reset
◆ Q = 8 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. The direction of
the offset position. Precise spool fit, low leakage, long service life movement is determined by the position of the spool and its symbol.
time. Spool made from hardened steel, body from high quality Manually or mechanically operated valves are particularly suitable
hydraulic cast steel. for use in installations where no electric current is available or for

applications in explosion hazard areas. Miniature values are used

where both, reduced dimensions and weight are important.

TYPE CODE
WD T F A03 - - #
Spool valve, direct operated
Roller with spring reset

Flange construction
Mounting interface acc. to Wandfluh standard, NG3-Mini

Designation of symbols acc. to table Operation a-side …1
Operation b-side …2
Sealing material NBR
FKM (Viton) D1
Design index (subject to change)
1.5-15
GENERAL SPECIFICATIONS HYDRAULIC SPECIFICATIONS
Designation 4/2-spool valve Working pressure p = 350 bar (p < 20 bar)
max
T
Construction Direct operated p = 315 bar (p > 20 bar)
T
max
Mounting Flange construction Tank pressure p T max = 100 bar
Nominal size NG3-Mini according to Wandfluh Maximum volume flow Q = 8 l/min, see characteristics
max
standard Leakage oil See characteristics
Actuation Roller actuated Fluid Mineral oil, other fluid on request
2
2
Ambient temperature -25…+70 °C Viscosity range 12 mm /s…320 mm /s
Weight 0,62 kg Temperature range -25…+70 °C (NBR)
MTTFd 150 years fluid -20…+70 °C (FKM)
Contamination Class 20 / 18 / 14
efficiency
Filtration Required filtration grade ß 10…16 ≥ 75,
see data sheet 1.0-50

ACTUATION
Actuation Roller
Actuation stroke s = 1,7 mm
Actuation force F = 90 - 120 N
b

www.wandfluh.com Illustrations are not binding Data subject to change 1/3 Edition: 21 33 1.5-15 E
Page 249