Design And Principle Of Operation - Samson 3966 Mounting And Operating Instructions

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. 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 into the exhaust air port.
This causes the pressure 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.
EB 3966 EN

Design and principle of operation

+
Nominal
signal
–
Port 3
Port 2
Fig. 1: Functional diagram
External
pilot supply
Port 9
Port 1
15