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PROPORTIONAL VALVES

When hydraulic pressures or volume flows are continuously controlled, proportional
hydraulics is used. The use of proportional solenoids enables a continuous and
proportional control of the valve. Proportional valves are operated with an electronic
control device that transforms a control signal into a corresponding solenoid current for
the valve. This solenoid current ensures an optimal, sensitive and precise control of the
valve.

SPOOL VALVES FLANGE WDPFA CHARACTERISTICS
The volume flow is controlled proportionally to the solenoid

current. A cylinder can thus be moved forward and backward
at variable speed.
FEATURES
• Progressive characteristic
• Good repeatability
• Direct or pilot operated
ACB-S
• Pressure max. 350 bar
A B
a 0 b • Flow max. 200 l/min
a b
P T • Nominal sizes NG3, NG4, NG6, NG10

SPOOL VALVES CARTRIDGE WDPPU CHARACTERISTICS

The volume flow is controlled proportionally to the solenoid
current. A cylinder can thus be moved forward and back-
ward at variable speed.
FEATURES
• Progressive characteristic
• Good repeatability
• Direct operated
• Pull/push armature tube
• Compact construction through short solenoids
ACB-S
• Pressure max. 350 bar
2 4
• Flow adjustable 0... 28 l/min
b 0 a
• Nominal sizes U08, U10
3 1

PRESSURE RELIEF VALVES BDPP, BVPP CHARACTERISTICS
Limits the pressure in port P to the value adjusted by means
of the solenoid current. Pressures and thus forces are varia-
bly adjustable.
FEATURES
• Linear characteristic and good repeatability
• Direct or pilot operated, optional inverse function
• Pressure max. 350 bar
(T) 2
• Flow max. 400 l/min
• Nominal sizes M18, M22, M33, M42
(P) 1

PAGE 8 | WANDFLUH MOBILE | PRODUCTS | PROPORTIONAL VALVES