Page 441 - Softbound_Edition_19_en

Proportional spool valve
Proportional spool valve

Proportional spool valve
NG10
Flange construction ISO 4401-05
◆ pilot operated
◆ Q = 200 l/min x II 2 G Ex db IIC T6, T4
max
◆ Q N max = 90 l/min x II 2 D Ex tb III C T80 °C, T130 °C
◆ p = 350 bar x I M2 Ex db I Mb
max
Class I Division 1
Class I Zone 1

DESCRIPTION APPLICATION
Pilot operated proportional spool valve with 4 connections in These valves are suitable for applications in explosion-hazard
5-chamber system. Very compact construction with corresponding areas, open cast and also in mines. Pilot operated valves are used

low weight and high flow values. The function of the pilot and main where large volume flows have to be controlled. Due to the large
valve as well as the interaction of both valves can be found in the flow range and the high stiffness of the actuation as a result of the
hydraulic diagram. Proportional to the solenoid current, the spool pilot control, these valves are suitable for applications where fast
stroke, the spool opening and the valve volume flow increase. The acceleration and deceleration processes, high speeds and sensi-
pressure tight encapsulated Ex-protection solenoid coil prevents tive motion sequences are required. The applications are in the
an explosion on the inside penetrating to the outside as well as an industrial as well as in the mobile hydraulics for the smooth control

ignitable surface temperature. For the control, Wandfluh proporti - of hydraulic actuations.
onal pressure valves (see register 2.3) and Wandfluh proportional
amplifiers (see register 1.13) are available.

CERTIFICATES ACTUATION

Surface Mining Standard M248 Pressure reducing valve
-25 °C Electronic MDBFA04-P / AB-25 for BCA-S / BDA-V
to… MDBFA04-P / B-25 for BC1-S / BD1-V
MDBFA04-P / A-25 for CA2-S / DA2-V
ATEX x x x x
IECEx x x x x Attention! The UL execution is always supplied without cable
gland
CCC x x x x
EAC x x x x
Australia x x x
MA x x x
UL / CSA x x
The certificates can be found on www.wandfluh.com

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

www.wandfluh.com Illustrations are not binding Data subject to change 1/5 Edition: 21 18 1.10-3520 E
Page 441