Danfoss Oil pump 537d8033

The Danfoss Oil pump 537d8033 is an oil pump assembly with an integral solenoid valve, designed for use in pressure-jet oil burners. It draws fuel from the tank and delivers it to the nozzle at the pressure that sets the firing rate. The integral solenoid valve provides a sharp fuel cut-off for clean flame extinction. This assembly is compatible with ACV BMV1, Prestige 100 MK4, Prestige 120 V14, CA 300 Compact, CA 400 Compact, and Delta Pro 85 models. It supports single-pipe mode operation.

When selecting a replacement oil pump of this type, verify the rotation direction (clockwise or counter-clockwise as seen from the shaft end), whether the system runs in single-pipe or two-pipe mode, the pump capacity and pressure range, shaft diameter and mounting pattern, and connection thread sizes. Ensure the shaft rotation matches the burner fan direction and that the solenoid coil voltage is compatible with the control box output. Check that pipe connections are tight and free of debris.

Common failures include worn gears causing pressure loss, a weak pressure regulator that fails to hold the set point, a leaking shaft seal, and solenoid coil failure that prevents clean fuel shut-off, leading to after-drip or delayed cut-off. These issues may result in unstable flame, poor combustion, or burner shutdown.