13
Bentone BG550/650
General
2.1.2
Functional discription of gas
flow
1.
When the valves V1 and V2 are closed, chamber A
is under inlet pressure.
2.
A hole D in the ilter housing connects min.
pressure switch with chamber A. If the inlet
pressure applied to the pressure switch exceeds
the incoming reference value, it switches through
to the automatic burner control.
3.
After release by the automatic burner control,
valves V1 and V2 open. The gas lows through
chambers A, B and C of the GasMultiBloc.
2.1.3
Operating method of valve-
regulator combination on valve
V1
A regulator, compensating for residual pressure is
integrated in valve V1 (pressure regulating part). Armature
7 is not connected to valve plate unit 3. When it opens,
armature 7 pretensions compression spring (V1) 5 and
releases the valve plate unit. When the valve closes, the
armature acts directly on the valve plate unit. The output
pressure upstream of valve 2 is deined by pretensioning
regulating spring 8 (tension spring) via setting screw 16.
The output pressure acts via opening E on the working
diaphragm of regulator part 1. In regulated state, setting
spring inlet pressure and pressure of working diaphragm
are in force equilibrium.
2.1.4
Operating method of valve V2
Armature 13 of valve V2 is connected to valve plate unit
11. When it opens, armature 13 pretensions closing
spring 12. The maximum valve opening can be set
by limiting the armature stroke by means of the main
volume restrictor 17. Min. opening (residual stroke) of
valve (0.5 to 1.0 mm) Main volume restrictor 17 is set by
rotating the adjusting plate or the hydraulic brake 19. The
fast and/or slow opening characteristic is inluensed by
setting the fast stroke 18 at the hydraulic brake 19 under
the cover.
2.1.5
Closing function
When the supply voltage to the solenoid coils of valves
V1 and V2 is interrupted, they are closed within < 1 s by
the compression springs.
2.1.6
Closing stroke limitation
(option)
A partial volume setting is possible by means of a closing
stroke limiter. Valve V2 becomes a regulating actuator
without zero shutoff. Partial volume and main volume are
adjustable.
MB-DLE403.....B01