Delavan has specialized in the development and production
of components for highly specialized industries for over 50
years. The Bamberg, South Carolina, plant produces a wide
range of oil burner nozzles for domestic and industrial
applications as well as accessories for the heating business
in general.
Delavan’s inspectors have the latest test instruments such
as this video projection microscope, here being used to
inspect the orifice dimension on the face of the nozzle.
Delavan has been designing and manufacturing nozzles
for oil heating industry for over 60 years. Quality assur-
ance was important to us way back then and still is
today. Since those early days, Delavan has grown and
expanded into other product lines as well, such as gas
turbine engine nozzles and accessories; nozzles, pumps
and accessories for agricultural and industrial spraying.
Delavan is unique in the oil heating industry because we
have developed training materials and programs to edu-
cate the oil heating service technician. Our nozzles are
the most widely distributed in the U.S. and Canada and
are also exported to many other countries. Delavan is
the leader in designing and manufacturing nozzles for
special industrial combustion applications. We specialize
Delavan PRECISION OIL BURNER NOZZLES
Delavan 100% tests its nozzles for flow rate and spray angle
using test oil, maintained to nominal fuel oil properties. Each
is rotated to check symmetry and spray quality, and to look
for any voids, streaks, or pulsations in the spray pattern.
Delavan inspectors audit nozzle components numerous
times during production prior to assembling and testing.
These checks are done to ensure the highest quality product
is delivered.
in assisting original equipment manufacturers in design-
ing and specifying the best nozzles to fit their applica-
tions.
Whether you are an engineer designing original oil
burner equipment or a service technician performing
annual service, remember Delavan for assured quality
and call on our knowledge and experience whenever
you have a combination nozzle application problem.
Fuel Metering Products Operation
P.O. Box 969 • Bamberg • South Carolina 29003
www.delavaninc.com
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100% Tested
Every nozzle tested.
Then we go one
step further and
clean the test oil
from the nozzle to
avoid plugging.
Why is Delavan so different?
➻81,48(,16,'($17,3/8*&216758&7,21
MEET THE CHALLENGE
• World leader in spray technology
• ISO 9001 Certified
• State of the art manufacturing equipment
• High technology research, design and quality assurance methods
THE WORLD DIMENSION
• Two manufacturing facilities with
R and D in the USA.
• Manufacturing and marketing facility
in the UK.
• Marketing and technical services in
Belgium.
• Intercontinental distribution network
Delavan PRECISION OIL BURNER NOZZLES
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Delavan PRECISION OIL BURNER NOZZLES
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STEADY STATE
HYDROCARBONS PPM
100
90
80
70
60
50
40
30
20
10
0
BURNER
START
BURNER
OFF
TEK TALK
SMART VALVE
DESIGN REDUCES
COMBUSTION
POLLUTION FOR
CLEANER HEATING
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Operating Pressures
Minimum Operating Pressures
Valve Supply Pump Valve Open Valve Close
Part # PSI (BAR) PSI (BAR) PSI (BAR)
60030-1 135.0 (9,3) 125.0 (8,6) 65.0 (4,5)
60030-2 100.0 (7,0) 60.0 (4,1) 45.0 (3,1)
A VARIETY OF NOZZLES THAT SUITS EVERY APPLICATION
HOLLOW-CONE Type A-nozzles are mainly used on
burners with a hollow cone air pattern and for through
puts up to 2.00 GPH. The droplet distribution is concen-
trated on the outside of the cone and results in good
ignition and low-noise combustion.
SOLID-CONE Type B-nozzles produce a spray that dis-
tributes droplets fairly uniformly throughout the com-
plete pattern. The spray pattern becomes progressively
more hollow at higher flow rates, particulary above 8.00
GPH. Provides smooth ignition and efficient combus-
tion, particulary in larger burners.
Type W “ ALL PURPOSE “-nozzles are neither truly hol-
low nor solid. These nozzles frequently can be used in
place of either solid or hollow cone nozzles between 0.40
and 8.00 GPH, regardless of the burner’s air pattern. The
lower flow rates tend to be more solid.
Type AR-D Nozzles are of a “solid cone” type similar to
Type B but with a slightly lower concentration of the
droplets in the center of the cone. They are high per-
formance in burners of low up to medium capacity (up
to flows of 2.00 GPH).
Type R-D Nozzles have a high concentration of droplets
in the center of the spray cone. They are particularly
recommened for burners with a highly concentrated
solid air pattern. The average droplet size is slightly
coarser than on the Standard Solid Cone Type B.
Type .579 MH Mobile Home Nozzles are low-capacity
nozzles designed for mobile home use. This design will
minimize the usual plugging problems associated with
low flow rates.
Semi-Solid nozzle (.50-2.00) 60
0
, 70
0
and 80
0
spray angles;
interchanges with other SS nozzles.
Del-O-Flo
TM
nozzles are low-capacity nozzles designed
to minimize the plugging problems associated with very
low flow rates. The special interior design of the
Del-O-Flo
TM
flushes contaminants through, limiting
build-up. These nozzles will satisfactorily interchange
with other hollow and solid cone nozzles. The
Del-O-Flo
TM
is available in 0.40 GPH up to 0.85 GPH.
Delavan PRECISION OIL BURNER NOZZLES
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NOZZLE RATINGS AND TESTING
Every nozzle is spray tested for flow rate, spray angle and
spray quality. Our nozzles are flow rated at 100 psi. Test
conditions include: fuel gravity within a total spread of 1-
1/2
0
API . . . viscosity within ± .04 centistoke (.03 SSU) . . .
pressure at 100 psi . . . fuel temperature at 80
0
F, ± 2
0
F . . . an
air-conditioned test area maintained at a temperature
spread of 4
0
F or less . . . and regularly calibrated pressure
gauges and flow meters.
NOZZLE INTERCHANGE
Replacing a nozzle of one make with another sometimes
presents problems. This is partly due to unique design dif-
ferences among the various makes, plus the fact that the
nozzle manufacturers use different methods for evaluating
spray angles, patterns and spray quality.
In many cases, nozzles with similar patterns and spray
angles are directly interchangeable. However, there are
other cases where nozzles that would seem to be equivalent
really are not. When this happens it is best to ask the burner
manufacturer for a recommendation. Otherwise, it is a mat-
ter of trial and error: (1) Trying nozzles with slightly higher
or lower flow rates, (2) wider or narrower angles and (3)
more solid or more hollow patterns, to see which one per-
forms best.
BURNER/NOZZLE SELECTION
Proper nozzle selection is a subject of great importance
because the performance of the nozzle is so directly related
to the overall performance of the burner. The wrong choice
of flow rate, spray angle or spray pattern for a given burner
air pattern can result in improper firing.
To match a nozzle to a burner takes field-service experience,
or trial-and-error, or a good foundation of understanding
angles, rates and patterns. Refer to Delavan’s service techni-
cians guide #884, “A Total Look at Oil Burner Nozzles” for
more technical information on nozzle selection and under-
standing angle, rates and patterns. Also refer to the Burner
Manufacturers’ Recommendations Chart below.
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1
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2
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3
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4
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5
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6
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