Danfoss 071N2201 BFP52E L3 oil pump

Danfoss BFP52EL3 071N2201 oil pumps used in small and medium-sized 2-level household burners with fuel consumption up to 42 l/h.

Danfoss 071N2201 BFP52EL3 gear pump features:

• Light fuels and kerosene
• 1 and 2 pipe operating modes
• 2 pressure levels
• 2 built-in pressure regulators
• E/m shut-off valve
• Cassette filter

Danfoss BFP52EL3 071N2201 oil pumps technical data:

• Viscosity range (in the suction line): 1.8-12.0 cSt(mm2/s)
• Filter area / cross-section: 11/200 cm2/microns
• Pressure range 1: 7-15 bar
• Pressure range 2: 10-25 bar
• Factory settings: 10/13 ±1 bar
• Max. pressure in the suction/return line: 2 bar
• Shaft rotation speed: 2400-3450 min
• Max. starting torque: 0.1 Nm
• Ambient/transport temperature: -20 to +70 °C
• Fuel temperature: 0 to +70 °C
• Coil protection degree: IP40
• Shaft: EN225

Danfoss BFP52EL3 071N2201 oil pumps adjustment:

From the suction line, through the filter, the fuel enters the gear mechanism, which increases its pressure. The diaphragm of the pressure regulator maintains it constant and equal to the setting value. When voltage is applied to the NC valve, it opens and fuel flows to the nozzle. When voltage is applied to the NO-valve, it closes and turns off the regulator.

The pressure rises to the setting level. In 2-pipe mode, excess fuel is returned to the tank via the return line. In single-tube mode, the return line is closed and the screw is missing. Excess fuel is sent to the bypass line.

When the burner is stopped, the supply voltage to the valves stops. The NO-valve opens and the NC-valve closes, stopping the fuel supply to the nozzle.

With 2-pipe mode, purging is not necessary. Through the constriction, the air goes into the return line. In single-tube mode, purging is carried out through the nozzle line fitting, or through the pressure gauge fitting.