Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Reexamination Certificate
2007-07-31
2007-07-31
Krishnamurthy, Ramesh (Department: 3753)
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
C137S489000, C431S018000, C431S090000
Reexamination Certificate
active
10928591
ABSTRACT:
For adjustment of a desired burner gas-air ratio over the broadest possible load range without additional pressure tapping of the burner, combustion chamber, or air lines, a ratio controller is provided that permits adjustment of the gas flow as a function of counterpressure. For adjustment, the ratio controller has at least one position-variable measurement site, or at least two measurement sites, connected directly or indirectly via a pilot valve, to an actuating diaphragm via a valve block or throttle valve block. Depending on whether the control pressure is picked up more from one or more from the other measurement site, the gas flow and therefore the gas-air ratio can be adjusted to be larger or smaller.
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Karl Dungs Gmbh & Co. KG
Krishnamurthy Ramesh
Reed Smith LLP
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