All
MONARCH nozzles are stamped with the following characteristics,
subject to modification on adoption of CEN standards:
- the flow (in USGPH at l00 PSI = 6.895 bar)
- manufacturing code
- spray angle;
- letters to identify the series of spray patterns;
- the, MONARCH trade mark.
MONARCH nozzles are individually tested at different production stages to assure exact conformity with master nozzles in each series.
The spray patterns (i.e. hollow cone or solid cone) described below refer to tests carried out with a 60° nozzle at a 75 mm distance from the orifice. Nozzles with spray angles of 60° or less, and with low flows in particular, the empty section of a hollow cone becomes smaller. The difference between a hollow cone and solid cone nearly disappears at this point.
Solid
Cone "R" Series: .40 to 3.50 USGPH
This
is the series supplied regularly unless specified otherwise.
It is a good nozzle suitable for most burners. Atomization of
the oil is not as fine as with the "NS" series.
Hollow
Cone "NS" Series: .50 to 2.00 USGPH
This
Series works best on many burners due to its exceptionally fine
atomization. It produces a quiet, stable flame and is widely
used on 80 and 90 flame retention burners.
Special
Solid Cone "AR" Series: .50 to 3.50 USGPH
This
series has become widely used due to its success in obtaining
quiet combustion in flame retention head burners. Traditionally,
a "cure-all" replacement nozzle, it now is increasingly
specified on original equipment.
Semi-Solid
Cone "PLP" Series: 2.25 to 100.00 USGPH
The
standard nozzle for larger capacities. Fine atomization and "solid"
spray pattern up to approximately 3.50 USGPH, gradually becoming
more "hollow" in the larger sizes.
Hollow
Cone "PL" Series: 2.25 to 50.00 USGPH
This
series represents an extension of the "NS" type spray
pattern for larger capacity sizes. Spray is not as finely atomized
as the "PLP" series, but produces the best results
in equipment specifying hollow cone nozzles.
Narrow
Spray Angle "HV" Series: 1.65 to 60.00 USGPH
Used
mostly for Semi-Industrial or Scotch Marine applications where
narrow spray angle and high spray velocity is essential, and
some combustion noise is not objectionable.
Heavy
Oil Nozzle Series: 1.25 to 100.00 USGPH
Designed
for use on 70 SSU (approx. 13 centistokes) viscosity oil at operating
pressures ranging from 200-450 PSIG (13.8 to 31 bar). Write for
special data sheet.