Page 198 - Softbound_Edition_19_en

Solenoid operated spool valve

Solenoid operated spool valve, intrinsically safe
NG4-Mini
Flange construction Wandfluh standard
◆ 4/2-way impulse valve
◆ 4/3-way with spring centred mid position Ex ia I Ma
◆ 4/2-way with spring reset Ex ia II C T5 / T6 Ga
◆ Q = 20 l/min xII 1 G Ex ia II C T6, T5
max
◆ p = 350 bar xI M1 Ex ia I Ma
max

DESCRIPTION APPLICATION
Direct operated solenoid spool valve with 4 connections in 5 These valves are suitable for applications in explosion-hazard
chamber design. With the solenoids deenergised, the spool is held areas, open cast and also in mines. Spool valves are mainly used for
in the center position by the spring (4/3), or switched back to the controlling direction of movement and stopping of hydraulic cylin-
offset position (4/2). With the impulse spool (4/2), the spool is held ders and motors. The direction of movement is determined by the
in the switching position by the detent. Intrinsic safety is achie- position of the spool and its symbol. Miniature values are used

ved by limiting the electric energy in the solenoid circuit by means where both, reduced dimensions and weight are important.

of a separate intrinsically safe power supply. Therewith sparking
is prevented from forming.

CERTIFICATES ACTUATION
Surface Mining Actuation Switching solenoid, wet pin push type,
gas and dust pressure tight
ATEX x x Execution M.Z45 (Data sheet 1.1-185) rotatable in
steps of 90 ° and easy exchangeable
IECEx x x
Connection ◆ Cable gland for cable Ø 6,5… 12 mm,
The certificates can be found on www.wandfluh.com
two phase conductors +/- as well as
one ground conductor
◆ Connector socket EN 175301 – 803

SYMBOL

AB3 AB1 AB2
A B A B A B
a b a b a b
a b a b a b
P T P T P T

ACB AC1 CB2
A B A B A B
a o b a b a b
a b a b a b
P T P T P T

ADB AD1 DB2
A B A B A B
o b a
a b 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 1/4 Edition: 19 26 1.3-28 E