baltur COMIST 122 DSPGM, Instruction

Page: 37 / 70

37
N° 8880
Rev. 06/11/90
INSTRUCTIONS FOR SETTING LANDIS & GYR
mod. SKP 10.110 B27 - SKP 10.111B27
SINGLE STAGE GAS VALVES
DESCRIPTION OF HOW THE VALVE OPERATES
Single-stage valves
When the valve receives the signal to open, the pump cuts in and the magnetic valve closes. The pump
transfers the oil from under the piston to above it, forcing the piston downward, which compresses the closure
return spring with the rod and plate. The valve remains in the open position while the pump and magnetic valve
remain powered. When the unit receives the signal to close (or if power supply is cut off) the pump shuts down,
the magnetic valve opens decompressing the chamber above the piston. The plate is closed both by the return
spring and by gas pressure. The flow rate for this valve is calculated to ensure full closure in less than one
second.
This type of valve cannot regulate the gas flow
rate (closure/opening).
Screw “D” on terminal “IV” sets the “clean
contact” position which can be used for an
outside signal.
A = Driver identification plate
B = Flow direction indicator
C = Valve body identification plate