Product Brochure

Tigerloop
®
eliminates common oil heating problems.
Burner Nozzle Problems
Diagram 1 shows a cut-away of a pump/
nozzle operating normally, except for the
air bubble lodged in the nozzle line. The
bubble is deceivingly small, since its size
has been compressed by the pressure in
the nozzle line. As long as the oil pump
operates, the bubble will remain small and
compressed, having no effect on burner
operation.
However, when the pump shuts down,
it is a different story. As the pump´s rpm
decreases, the piston will close against
the nozzle seat, cutting off the ow of oil
from the pump, but not the ow of oil from
the nozzle. The expanding bubble has
taken over for the pump in supplying the
pressure, pushing oil out of the nozzle.
(diagram 2).
Oil ow does not cease until the bubble
has expanded back to its original size and
nozzle line pressure has dropped to zero
(diagram 3). The result is virtually no cut-
off, with sooty, smoky shutdowns. And, a
solenoid valve will not help this problem. It
is strictly a problem caused by air bubbles.
Diagram 1
145 PSI
Diagram 2
115 PSI
Diagram 3
15 PSI