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Eclipse RatioMatic BurnersModel RM1250
Data sheet Edition 08.15
Version 61 Maximum inputs for packaged blower versions are given for the standard combustion air blower without an inlet airfilter.
2 Turndown input based on neutral chamber conditions. Contact Eclipse for other chamber pressures.3 For proper performance, this pressure must be kept constant across the burner operating range.4 See Design Guide 110 for more information about typical fuel composition and properties.5 All weights are approximate.• All information is based on laboratory testing. Different chamber conditions will affect the data.• All inputs based upon gross calorific values and standard conditions; 1 atmosphere, 70°F (21°C).• Eclipse reserves the right to change the construction and/or configuration of our products
at any time without being obliged to adjust earlier supplies accordingly.
Parameter SpecificationsBlower Type Chamber Pressure
"w.c. (mbar)60 Hz
Packaged BlowerMaximum Input, Btu/h (kW)1
For chamber pressures outside the given range or for varying chamber pressure conditions, contact Eclipse, Inc.
-5.0 (-12.5) 14,600,000 (4279)-3.0 (-7.5) 13,800,000 (4045)-1.0 (-2.5) 12,900,000 (3781)
0 (0.0) 12,500,000 (3664)1.0 (2.5) 12,000,000 (3517)2.0 (5.0) 11,500,000 (3371)
Minimum Input, Btu/h (kW)2For lower inputs, contact Eclipse, Inc. 625,000 (183)
Maximum Chamber Temperature, °F (°C) Burner with alloy tube 1500°F (815°C)Burner with refractory block 1900°F (1038°C)
Main Gas Inlet Pressure, "w.c. (mbar)3Fuel pressure at ratio regulator inlet 20 to 55 (50 to 138)
Pilot Gas Pressure at the Pilot Cock Inlet Minimum: 6" w.c. (15 mbar)High Fire Visible Flame Length, inches (mm)Measured from the outlet end of the combustor 144" (3.66 m) Measured from the end of the firing tube
Pilot Integral spark-ignited pilotFlame Detection UV scanner only.Fuels4
For any other mixed gas, contact Eclipse, Inc.Standard nozzles burn natural gas, propane, propane/air mixes
without changing internals.Blower Motor Power, Hp 10.0Weights, lbs (kg)5 Alloy Tube 807 (366)
Refractory 1124 (510)Approvals
RatioMatic RM1250, V6, Data sheet, Edition 08.15
Performance Graphs
Emissions from the burner are influenced by:
• Chamber conditions• Fuel type• Firing rate• Ratio regulator adjustment• Combustion air temperature
CO emission is largely influenced by chamber conditions.Contact your local Eclipse representative for an estimateof CO emission on your application.
Control and �peration Curve
1
10
100
1000
0 5,0002,500 7,500 10,000 12,500Input (x 1000 Btu/h)
% E
xces
s A
ir
Typical Ratio Control
Input and excess air at low fire changes with ratio regulator adjustment.
Input (kW)0 1400700 2100 2800 3500
Fuel ∆p vs. Input(∆p Measured Between Tap B
and the Chamber with Burner Firing)
2,000 4,000 6,000 8,000 10,0000
2
1
0
5.0
2.5
0.0
Fuel
∆P
(”w
.c.)
± 5%
Fuel
∆P
(mba
r) ±
5%
12,000 14,000
4
3
10.0
7.5
512.5
615.0
717.5
820.0
922.5
0 600 1200 1800 2400 3000 3600 4100
Input (x 1000 Btu/h)
Input (kW)
10
8
6
4
2
0
Fuel
Orif
ice
∆P (”
w.c
.) ±
5%
Fuel
Orif
ice
∆P (m
bar)
± 5
%
12
25
20
15
10
5
0
30
1435
1640
2000 60000 10,000Input (x 1000 Btu/h)
Input (kW)0
14,000
1800 3600 40991350 2250900450 3150
Air ∆p vs. Input(∆p Measured Between Tap C
and the Chamber with the Burner Firing)
RatioMatic RM1250, V6, Data sheet, Edition 08.15
Dimensions and SpecificationsDimensions in mm (inches)
325.4(12.8)
UV Scanner
Spark rod
Peepsight
PeepsightPilot Gas
1025(40.4)
Fuel Inlet3” ANSI or DN80 Flange
Ø559 (22) Ø527 B.C. (20.7)
Ø407(16)
691.8(27.24)
17.6(.69)
299(11.8)
8X Ø12 (0.5)
766(30.2)
451(17.8)
473.2(18.6)
Ø362 B.C.(14.3)
12X Ø25.4(1.0)
8X Ø12(0.5)
Ø683(26.9)
Ø635 B.C.(25.0)
766(30.2)
Fuel Inlet3” ANSI or
DN80 Flange373.9(14.7)
331(13.0)
700.8(27.6)
26.6(1.1)
300(11.8)
Ø597(23.5)
Shown with Block and Holder
RatioMatic RM1250, V6, Data sheet, Edition 08.15
Burner Configurations
Left Hand Piping Right Hand Piping
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