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Proportional spool valve
Proportional spool valve

Proportional spool valve with integrated
electronics and spool position control with LVDT NG4-Mini
Wandfluh standard
Flange construction
◆ direct operated
◆ Q = 20 l/min
max
◆ Q N max = 8 l/min
◆ p = 315 bar
max

DESCRIPTION APPLICATION
Direct operated proportional spool valve with 4 connections in Proportional spool valves are perfectly suitable for demanding
5-chamber system. With the integrated spool position sensor tasks due to the high resolution, large volume flow and low hystere-
(LVDT), the actual position of the spool is continuously recorded sis. They are used where good valve–to–valve reproducibility, easy
and made to follow the transmitted command value. By means of installation, comfortable operation and high precision are very im-
this internal position control, a minimum hysteresis and excellent portant. The integrated controller reliefs the machine control and
dynamic characteristics are assured. The Plug & Play valves are operates the axis (position, angle, pressure, etc.) in a closed cont-
factory set and adjusted and have therefore a high valve-to-valve rol loop. The applications are in the industry as well as in the mobile
reproducibility. Proportional to the electronically transmitted hydraulics for the smooth control of hydraulic actuators. Some
command value, the spool stroke, the spool opening and the valve examples: control of the rotor blades of wind generators, forestry
volume flow increase. The control takes place via an analogue and earth moving machines, machine tools and paper production
interface or a fieldbus interface (CANopen, J1939 or Profibus DP). machines, simple position controls, robotics and fan control.
The parameterisation takes place by means of the free of cost para - Miniature values are used where both, reduced dimensions and
meterisation and diagnostics software «PASO» or via fieldbus weight are important.
interface. The USB parameterisation interface is accessible
through a screw plug. As an option, these valves are available with
integrated controller. As feedback value generators sensors with
voltage or current output can be connected directly. The available
controller structures are optimised for applications with hydraulic
actuations.

SYMBOL
Symmetrical control Meter-in control
S4D41 V4D42

A B A B
0
a 0 b a b
a b a b
P T P T

ELECTRICAL SPECIFICATIONS ACTUATION
Protection class IP67 with suitable mating connector and Actuation Proportional solenoid, wet pin push
closed housing cover type, pressure tight
Ramps Adjustable Connection Via device receptacle
Parameterisation Via fieldbus or USB
Supply voltage 24 VDC
Note! Exact electrical specifications and detailed description
of «DSV» electronics can be found on data sheet
1.13-76.

www.wandfluh.com Illustrations are not binding Data subject to change 1/6 Edition: 21 48 1.10-70 E
Page 349