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Low initial cost, high operating efficiency
deliver substantial return on investment
K. Internal water-cooled
furnace with low heat re-
lease rate.
L. Steam boilers with extra
large drum with high steam
release area ensure stable
water level and dry steam.
M. Pressurized design:
inner fireside casing con-
structed of heavy gauge
steel, completely sealed,
lined with high temperature
insulation and refractory.
A. Water side or steam side interior accessible for
cleanout and inspection, front and rear openings, up-
per and lower drums.
B. Large volume water leg downcomers promote rapid
internal circulation, temperature equalization and effi-
cient heat transfer.
C. Boiler tube and furnace area access panel: heavy
gauge steel-lined with high temperature ceramic fiber
and insulation, bolted and tightly sealed to boiler frame.
D. Single side access; combustion chamber, tubes and
burner head are completely accessible from one side
simplifying maintenance and minimizing floor space.
E. Minimum sized flue vent.
F. Control panel: all controls installed with connections to
terminal strip.
G. Forced draft, flame retention head type burner. Effi-
cient combustion of oil or gas, quiet operation.
H. Heavy steel boiler frame, built and stamped in accor-
dance with the appropriate ASME Boiler Code.
I. Heavy gauge steel boiler jacket with rust-resistant zinc
coating and enamel finish, insulated with fiberglass to
insure exceptionally cool outer surface.
J. Bryan bent water tubes are flexible, individually re-
placeable without welding or rolling. Never more than two
tube configurations.
• True “flexible water
tube” design
• High quality steam for
heat or process
• Pressurized firing for
high efficiency
A
L
F
G
D
K
B
C
J
E
M
H
I
Bryan DR Series Boiler Specifications
DR250-S 250 (73) 200 (59) 6 (59) — — 206 (93) 66 (6.1) 1,150 (522)
DR350-W 350 (103) 280 (82) 8 (82) 292 (86) 9 (86) — 66 (6.1) 1,150 (522)
DR350-S 350 (103) 280 (82) 8 (82) — — 288 (131) 66 (6.1) 1,150 (522)
DR450-W 450 (132) 360 (106) 10 (98) 376 (110) 11 (110) — 66 (6.1) 1,150 (522)
DR450-S 450 (132) 360 (106) 10 (98) — — 371 (168) 66 (6.1) 1,150 (522)
DR650-W 650 (190) 520 (152) 15 (147) 543 (159) 16 (159) — 103 (9.6) 1,650 (748)
DR650-S 650 (190) 520 (152) 15 (147) — — 536 (243) 103 (9.6) 1,650 (748)
DR850-W 850 (249) 680 (199) 20 (196) 710 (208) 21 (208) — 103 (9.6) 1,650 (748)
DR850-S 850 (249) 680 (199) 20 (196) — — 701 (318) 103 (9.6) 1,650 (748)
BOILER
MODEL
(1)
INPUT
MBH
(KW)
OUTPUT@ 80%
EFFICIENCY
(2)
MBH (KW)
HP (KW)
OUTPUT@ 83.5%
EFFICIENCY
(3)
MBH (KW)
HP (KW)
STEAM OUTPUT
(4)
LBS/HR (KG/HR)
HEATING
SURFACE
SQ. FT. (M
2
)
APPROX.
SHIP
LBS. (KG)
NOTES: (1) W = Water / S = Steam
(2) Output and horsepower based on boiler industry standard of 80% of input.
(3) Output and horsepower based on an average natural gas combustion efficiency of 83.5% for hot water boiler. Actual combustion efficiencies for oil will be higher.
(4) Lbs. steam per hour from and at 212°F.