Fluid handling – Systems – Closed circulating system
Patent
1989-04-10
1990-07-17
Rivell, John
Fluid handling
Systems
Closed circulating system
137599, 239126, F16K 2300
Patent
active
049415050
ABSTRACT:
In order to prevent dripping in an oil supply system for a burner nozzle there is provided a pump stop valve in the supply line that connects the pressure outlet of the pump to the burner nozzle and a nozzle shut-off valve in the supply line between the pump stop valve and the nozzle. A circulating valve is provided in parallel to the pump stop valve to open when the pressure between the pump stop valve and the nozzle shut off valve is higher than the pressure at the pump outlet. As a result if the oil in the supply line adjacent the nozzle expands, oil can return through the circulating valve to the line between the pump stop valve and the pump outlet.
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Kirkelund Poul
Klausen Jorn H.
Danfoss A/S
Easton Wayne B.
Johnson Clayton R.
Rivell John
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