Valves and valve actuation – Permanent or constantly energized magnet actuator
Patent
1991-10-08
1992-10-27
Jones, Larry
Valves and valve actuation
Permanent or constantly energized magnet actuator
431 89, 431 90, 1376254, F16K 3108
Patent
active
051582619
ABSTRACT:
A proportional combustion control device for supplying fuel to a combustor for a boiler, a hot water maker, etc., comprising an opening and closing valve for controlling a supply of fuel provided in the midst of a fuel supply pipe, and a control valve having a spindle whose needle portion at the extreme end is moved in and out of a nozzle and an exciting coil to generate a drive force for intermittently and axially moving said spindle against the restoring force by being supplied with a drive pulse, wherein even if fuel is either oil or gas, proportional control of combustion can be made, and the spindle is intermittently moved in the range capable of continuously carrying out combustion to open and close the nozzle whereby jetting of fuel is subjected to proportional control at the turndown ratio of 1/5 to 1/10 to always render the stabilized combustion possible.
REFERENCES:
patent: 3661302 (1972-05-01), Braun
patent: 4819693 (1989-04-01), Rodder
patent: 4988074 (1991-01-01), Najmolhoda
Jones Larry
Yamatake-Honeywell Co. Ltd.
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