Samson 3969, Монтаж и эксплуатация

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14 EB 3969 EN
Design and principle of operation
3 Design and principle of oper-
ation
The solenoid valve consists of an electro-
pneumatic binary converter with manual
override and integrated poppet valve actuat-
ed on one side with return spring.
The pilot supply for the electropneumatic bi-
nary converter is fed internally through port
1 or externally through port 9. By turning the
turnable gasket, the pilot supply can be
changed.
In the idle position, the armature is pressed
against the seat of the supply air port by the
spring. This causes the ball to close the hole
for the pilot supply port and prevents the so-
lenoid valve from consuming air.
The solenoid coil is energized by an electric
binary signal which causes the armature to
be lifted out of the seat of the supply air port
against the force of the spring and drawn in-
to the exhaust air port. This causes the pres-
sure to rise above the activation pressure of
the integrated poppet valve and switches it
to the operating position. After the solenoid
coil is de-energized, the integrated poppet
valve is switched to the idle position again
by a return spring.
Optionally, the solenoid valve can be up-
graded to become a pneumatic poppet valve
actuated on one side. This results in higher
K
VS
coefficients (see Data Sheet
u
T 3756 ).
+
–
Nominal
signal
External pilot
supply
Port 9
Port 1
Port 3
Port 2
Fig. 1: Solenoid valve with seat/plug switching
element as a booster valve (K
VS
0.3)