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Proportional spool valve
Proportional spool valve

Proportional spool valve
NG10
Flange construction ISO 4401-05
◆ pilot operated
◆ Q = 200 l/min
max
◆ Q N max = 90 l/min
◆ p = 350 bar
max

DESCRIPTION APPLICATION
Pilot operated proportional spool valve with 4 connections in Proportional spool valves are perfectly suitable for demanding
5-chamber system. Precise spool fit, low leakage, long service life tasks due to the high resolution, large volume flow and low hystere-
time. Very compact construction with corresponding low weight. sis. Pilot operated valves are used where large volume flows have
The pilot valve is a proportional solenoid operated pressure redu- to be controlled. Due to the large flow range and the high stiffness
cing valve. The function of the pilot and main valve as well as the of the actuation as a result of the pilot control, these valves are
interaction of both valves can be found in the hydraulic diagram. suitable for applications where fast acceleration and deceleration
Proportional to the solenoid current, the spool stroke, the spool processes, high speeds and sensitive motion sequences are requi-
opening and the valve volume flow increase. The proportional spool red. The applications are in the industrial as well as in the mobile
valve is not pressure compensated. For the control, Wandfluh hydraulics for the smooth control of hydraulic actuations.

proportional amplifiers are available (see register 1.13).

SYMBOL
Symmetrical control
BCA-S BC1-S CA2-S
A B A B A B
a 0 b a b
a b a b
P T P T P T

Meter-in control
BDA-V BD1-V DA2-V
A B A B A B
0
a b a b
a b a b
P T P T P T

Types of pilot operation
ti xi xe ae
A B A B A B A B

A B A B A B A B
a b a b a b a b

P X Y T P X Y T P X Y T P X Y T

www.wandfluh.com Illustrations are not binding Data subject to change 1/4 Edition: 20 08 1.10-3500 E
Page 431