Eclipse Bayonet UltraRecuperator

Data sheet Edition 2.06

The Eclipse Bayonet-Ultra Recuperator is designed toinsert into the exhaust leg of "U", "O", or Trident typeradiant tubes. The Bayonet-Ultra can be used with cleanexhaust streams up to 2100°F. For higher temperatures,dirty flue products, or systems requiring very low pressuredrops, a less efficient single-tube version of the Bayonetrecuperator can be supplied.

Bayonet-Ultra Recuperators are available in four sizes. Allbut the smallest size can be ordered with a choice of twopressure drops. The higher pressure drop modelproduces hotter combustion air under the same operatingconditions.

• Compact housing• Choice of air pressure drops• Stainless steel exhaust extension• Length tailored to suit the application• Cold drawn NiCr stainless steel tubes• Central viewing and exhaust sampling port• Housing internally cooled by incoming combustion air• Precision tube plate for exact tube alignment and even

air flow

Dimensions

K

Peepsight

“M” Sq.Air

Outlet2

“C” Int.NPSC

G H

J

Air CooledInlet

Housing

“L”Exhaust Stainless

ExhaustExtension1

MountingFlange asRequired

AirInlet2

“B” Int.NPSCE

FAs

Required3As

Required3

“A”MinimumRadiantTube ID

1Insulation must be supplied by the customer.2Do not reverse inlet and outle connections or the recuperator may overheat.3Tube ends must not extend past the inner face of the furnace wall.

Catalog Number

DimensionsA B C D E F G H J K L M

3 BU 2-7/8 1-1/2 1-1/2 1-5/8 3-1/2 8-1/2 3-1/4 2-7/8 4 2-1/2 2 5-1/44 BU 3-1/2 1-1/2 1-1/2 1-5/8 3-1/2 8-1/2 3-3/4 3-3/8 4-1/2 3-1/2 2 6-1/45 BU 4-3/4 2 2 1-7/8 4-3/8 9-1/2 4-1/2 3-3/4 5 4-1/2 2 7-1/46 BU 5-1/2 2 2 1-7/8 4-3/8 9-1/2 5 4-3/16 5-1/2 5-1/2 2 8-1/4

Bayonet Ultra Recuperator, Data sheet, Edition 2.06

Performance DataBased on 25" Effective Length

To Find Preheated Air Temperature: Find burner input on bottom scale. Move up to appropriate radiant tube exhausttemperature curve, then move left to combustion air temperature.

To Find Air and Exhaust Pressure Drops: Find burner input on bottom scale. Move up to pressure drop curve, thenmove right to air and exhaust pressure drops.

Example: A radiant tube with a burner input of 100,000 Btu/h and an exhaust temperature of 1750°F will be fitted witha 3 BU recuperator. Using the graph for the 3 BU as described above, preheated combustion air temperature from therecuperator will be approximately 740°F. Air pressure drops will be approximately 3.7 "w.c. and exhaust pressure dropwill be approximately 0.72 "w.c.

8 1.6 (4.0)

1.4 (3.5)

1.2 (3.0)

1.0 (2.5)

0.8 (2.0)

0.6 (1.5)

0.4 (1.0)

0.2 (0.5)

0.0 (0.0)

7

6

5

4

3

2

1

050 100 150

15 30 45

900(482)

800(427)

700(371)

600(316)

Com

bustion Air

Com

bust

ion

Air

Tem

p, °F

(°C

) Pressure Drop, “w

.c. (mbar)

Exhaust

Burner Input (x 1000 Btu/h)

Burner Input (kW)

3 BU

Pres

sure

Dro

pExhaust = 1900ºF (1038°C)

= 1800°F (982°C)

= 1700°F (927°C)

Pres

sure

Dro

p

Exhaust= 1900ºF (1038ºC)= 1800ºF (982ºC)= 1700ºF (927ºC)

1.0(2.5)

0.8(2.0)

0.6(1.5)

0.4(1.0)

0.2(0.5)

0.0(0.0)

20

16

12

8

4

040 100 200

12 30 60

260

76

900(482)

800(427)

1100(593)

1000(538)

700(371)

600(316)

Com

bustion Air

Com

bust

ion

Air

Tem

p, °F

(°C

)

Pressure Drop, “w

.c. (mbar)

Exhaust

Burner Input (x 1000 Btu/h)

Burner Input (kW)

4 BUHigh ∆P

Exhaust= 1900ºF (1038ºC)

= 1800ºF (982ºC)

= 1700ºF (927ºC)

1.0(2.5)

0.8(2.0)

0.6(1.5)

0.4(1.0)

0.2(0.5)

0.0(0.0)

10

8

6

4

2

040 100 200

12 30 60

260

76

900(482)

800(427)

1100(593)

1000(538)

700(371)

600(316)

Com

bustion Air

Com

bust

ion

Air

Tem

p, °F

(°C

)

Pressure Drop, “w

.c. (mbar)

Exhaust

Burner Input (x 1000 Btu/h)

Burner Input (kW)

4 BULow ∆P

Bayonet Ultra Recuperator, Data sheet, Edition 2.06

Bayonet Ultra Recuperator, Data sheet, Edition 2.06

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