![]() ![]() Quoting from Webster's description of their current product line we can read the typical capabilities of modern heating oil fuel pumping units: Manuals for oil burner fuel units are foundĪt OIL BURNER MANUALS Single stage & two stage fuel unit operating capabilities Webster's M-series fuel units are also widely used as OEM equipment on a variety of oil burners found on residential heating boilers, furnaces, and water heaters. The single-stage Sunstrand J-pump and the two-stage Sunstrand H-pump were among the most widely used fuel units we encountered when servicing heating equipment in the Northeastern U.S. At left is a Webster single-stage 3450-rpm fuel unit.īoth companies make a range of excellent products that in our experience have proven durable and simple to install and maintain. Two common brands of widely used fuel units for oil burners are Danfoss Sunstrand or Suntec (photo at page top) and Webster (images at left and above-left). Danfoss / Sunstrand / Suntec & Webster Oil Burner Fuel Units The "oil pump", properly called the fuel unit in most oil heating texts, draws heating oil from the oil storage tank, pressurizes the oil to high pressures of 100 to 125 psi (typically on modern retention head oil burners), and delivers oil to the oil burner nozzle where the combination of high oil pressure, combustion air, and turbulating devices (in the nozzle and/or at the end of the oil burner) atomize the oil and spray it into the combustion chamber. Warnings about using biodiesel in older oil burners. ![]()
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