Post on 08-Aug-2018
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Series "NP" & "RG" AIRFLOBurnersPerformance Selection Data
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Page 5505
Operation in shaded arearequires specialconsiderations
Operation in shaded arearequires specialconsiderations
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Inlet Feed Limitations:
NP-I NP-II NP-III RG-IV
1-1/4" end 4' 4' 2000 4'inlet flange KBtu/hr1-1/2" back 5' 5' 4500 5'
inlets* KBtu/hr
Performance Selection Data(cont'd.)
Airstream velocity across and through your burner's mixingplates must be kept uniform and within desired limits by use of asilhouette profile plate through which the burner fires. A 6" (mini-mum) profile plate should be installed surrounding the interior ductwalls at the leading edge of your burners mixing plates.
Optimum design ranges for the various burner types are shown
in the above graphs. Velocities (SFPM) are measured with avelometer directly in the duct at the plane of the profile plate andleading edge of burner mixing plates.
To determine profile opening areas, add burner displacementareas (Ft2/section) from Table 1 for your complete burner assemblyto "Net Free Area" of your duct:
"Net Free Area" of Duct (Ft2) = Fan Volume (SCFM)Velocity (SFPM)
Net Free Area (Ft2) + Burner Displacement (Ft2) = Profile Area (Ft2)
Various duct size/profile area relationships may give slightlydifferent field site data than is shown in Table 2. Velocities should
always be confirmed and established by use of a velometer onactual field site installation.
Series "NP" & "RG" AIRFLOBurnersPage 5506
*Note: For 36 back inlet sections, not more than 6"
off any one leg
Pilot Capacities: Nominally rated at25,000 Btu/hr with natural gas differen-tial pressures of 4-6" w.c.
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thgiartS"6 52.0 33.0
thgiartS"21 05.0 66.0
thgiartS"81 57.0 99.0
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telnIkcaB"21 05.0 66.0
telnIkcaB"63 02.1 05.1
eeT"6x"21 06.0 57.0
woblE"6x"6 54.0 06.0
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Series "NP" AIRFLOBurners
Approximate Envelope Dimensions
(Nominal, in Inches)
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Page 5507
Burner Sections(All burners shown are available in NP-I, II or III versions. Use one of these numbers (I, II or III) in place of asterisk (*)
in burner designation when ordering.)
NP- * -2424" Straight
NP- * -1818" Straight
NP- * -66" Straight
or 6"PPilot
NP- * -12 orNP- * -12B
12" Straight or 12BBack Inlet
NP- * -L6" X 6" Elbow
NP- * -T12" X 6" Tee
NP- * -36B36B Back Inlet
Typical End View
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Page 5508 Series "NP" AIRFLOBurnersPilots, End Closures, and End Inlet Flange Sets
NOTE: All open ends of burner assembly must be closed off with one of these end closures or pilots.One-piece cast end closures should not be used if temperature rise exceeds 300F.
Typical End View
Legend:
1 - 1/8" test connection2 - 1/4" pilot gas connection
3 - 14mm spark ignitor connection4 - 1/2" or 3/4" UV/FR connection
bushed to 1/4" for FR5 - Alternate 1/4" angled FR location6 - 1/8" pilot gas connection7 - 1-1/4" NPT gas inlet
Pilot End Plate Sets
NP-EC-SI-3/4"UV(1 pc) Pilot Set w/
SI
NP-EC-SI-1/2"-FR(1 pc) End Closure
Set w/SI
Pilot Assembly Section
NP-6P Pilot Sec-
tion w/Built-in Pilotincludes end platepilot w/SI onto its
own special 6"Series NP AIRFLO
Burner assembly
NP-Pak Pilot Setw/orifice/cock/
tube/SI
NP-Pak Pilot Setw/Adj. Orifice/SI
NP-Pak Pilot Setw/SI
Common Dimensions (Nominal, in Inches)
PIpe threads on this page conform to NPT(ANSI Standard B2.1)
Plain End Closure Sets End Inlet & Pilot Flange Sets
NP-EC (1 pc)
End Closure Set
NP-EP (2 pc)
End Plate Set
NPF- 1-1/4"- FR-SI
(2 pc) Pilot Set w/SI
NPF- 1-1/4"- EP
(2 pc)End InletFlange Set
NPF- 1-1/4" -FR-SI
(1 pc) Pilot Set w/SI
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Series "RG" AIRFLOBurners
Approximate Envelope Dimensions(Nominal, in Inches)
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Page 5509
Burner Sections
Typical End View
RG-IV-66" Straight or6"P Pilot
RG-IV-12 orRG-IV-12B12" Straight or 12B
Back Inlet
RG-IV-1818" Straight RG-IV-2424" Straight
RG-IV-L6" X 6" Elbow RG-IV-T12" X 6" Tee RG-IV-36B36B Back Inlet
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Series "RG" AIRFLOBurnersPilots, End Closures, and End Inlet Flange Sets
NOTE: All "open" ends of burner assembly must be closed off with one of these end closures or pilots.
One piece cast end closures should not be used if temperature rise exceeds 300F.
Page 5510
Pipe threads on this page conform to NPT(ANSI Standard B2.1)
Legend:1 - 1/8" test connection
2 - 1/4" pilot gas connection3 - 14mm spark ignitor connection4 - 1/2" UV/FR conn. bushed to 1/4" for FR
5 - Alternate 1/4" angled FR location6 - 1/8" pilot gas connection
7 - 1-1/4" NPT gas inlet
Typical End View
Pilot Assembly Section
Common Dimensions(Nominal, in Inches)
RG-EP (2 pc)End Plate Set
RGF- 1-1/4" -FR-SI(1 pc) Pilot Set w/SI
RGF- 1-1/4"- EP
(2 pc)End InletFlange Set
RGF- 1-1/4"- FR-SI(2 pc) Pilot Set w/SI
Pilot End Plate Sets
RG-Pak Pilot Setw/ SI
RG-Pak Pilot Setw/orifice/cock/tube/SI
RG-6P Pilot Sec-
tion w/Built-in Pilotincludes end plate
pilot w/SI and aspecial 6" Series
RG AIRFLO
Burner assembly
Plain End Closure Sets End Inlet & Pilot Flange Sets
RG-Pak Pilot Setw/Adj. Orifice/SI
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"NP" & "RG" AIRFLO Burners
Accessories / Replacement ItemsDimensions, Nominal in Inches
Page 5511
Division Plate
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1/4" dia.
14mm Spark Ignitor
Flame Rod (1/4" NPT)
Adjustable Orifice
Provides isolation of burner feed where desirable.
Profile Plate Bracket
Provides support for profile within closed burner loop.
Support Bracket
Normally used in pairs as shown here.
Mount to burner assembly at any joint.
External Mounting Assembly
External Mounting Plate Used with typical pilot Opening Required
Frequently used to provide easy accessibil ity to spark ignitor and flame supervision components.
Includes Mounting Plate
with two (2) feed-throughinsulators for internal
mounting of Spark Ignitorand Flame Rod.
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"NP" & "RG" AIRFLOBurnersPage 5512
Notes