Bryan “Flexible Water Tube”
K Series
Steam & Water Boilers
3,500,000 to 6,500,000 BTUH
Atmospheric gas fired
Form No. 4950
(1/03)
Water Boiler
K500-W-GI
Steam Boiler
K-350-S150-GI
Originators of the “Flexible Water Tube” design
High efficiency hot water and steam boilers
for commercial and industrial applications
Bryan flexible water tube boilers are ideally suited for
both hot water and steam space heating systems as
well as either high or low pressure process steam. In
a range of sizes from 3,500,000 to 6,500,000 BTUH
input, Bryan K series flexible tube boilers are ideal for
many commercial, institutional and industrial applications. These include healthcare facilities; schools;
apartments; churches; office buildings; correctional
facilities; airports; sewage treatment plants; golf,
tennis and fitness clubs. Hospitals, dairies, restaurants, laundries, dry cleaners, food processing, tire
recapping and metal plating are just a few of the
many applications.
All Bryan boilers are built in accordance with the requirements of the ASME
Boiler and Pressure Vessel Code.
Efficient “Flexible Water Tube”
design
The Bryan bent water tube provides rapid
internal circulation — for maximum heat
transfer and operating efficiency.
Easily replaceable tubes
Tubes are easily removable and replaceable without
welding or rolling. Requires little service space.
No “Thermal Shock”
The flexibility of the bent water tube design eliminates all possible damage from "Thermal Shock"
and from stresses caused by poor or unequal internal circulation. This is particularly important with
forced hot water heating systems designed for higher
temperatures and greater temperature drops.
Steam Boilers:
Steam release area
Large, full-size steam drum provides for dry steam
and stable water level.
High or low pressure construction
Boiler is constructed as standard for 15 psi or 150 psi
maximum working pressure. Also available for higher
pressures to 300 psi.
Water Boilers:
High or low pressure construction
Boiler is constructed as standard for 160
psi maximum working pressure at 230°F
operating temperature and 250°F design
temperature. Also available for higher
pressures to 250 psi, at 285°F operating
temperature and 300°F design temperature.
Natural internal circulation
The water tube design and the large
downcomer legs provide adequate internal circulation without concern over exterior pumping conditions. Low pressure drop through boiler.
Compact — minimum floor space
Requires less floor space than most boilers, and
tubes can be removed and replaced from one side,
further minimizing space needs.
Shipped completely assembled and wired. Units
can also be shipped "Knocked Down" for on-site
assembly.
Bryan K Series Boiler Specifications
BOILER INPUT
MODEL MBH (KW)
K-350 3,500 (1,025.5) 2,800 (840.4) 84 2,886 424 (39.4) 5,800 (2,636)
K-400 4,000 (1,172.0) 3,200 (937.6) 96 3,298 480 (44.6) 6,410 (2,912)
K-450 4,500 (1,318.5) 3,600 (1,054.8) 108 3,710 540 (50.2) 7,020 (3,188)
K-500 5,000 (1,465.0) 4,000 (1,172.0) 120 4,122 600 (55.7) 7,630 (3,466)
K-550 5,500 (1,611.5) 4,400 (1,289.2) 131 4,535 661 (61.4) 8,420 (3,825)
K-600 6,000 (1,758.0) 4,800 (1,406.4) 143 4,947 717 (66.6) 8,850 (4,020)
K-650 6,500 (1,904.5) 5,200 (1,523.6) 155 5,359 777 (72.2) 9,460 (4,298)
NOTES: * Lbs. steam per hour from and at 212°F.
NOMINAL OUTPUT STEAM HEATING APPROX.
OUTPUT SURFACE SHIP WT.
MBH (KW) BHP LBS/HR* SQ. FT. (M²) LBS. (KG)
Design and construction features
that assure reliable performance
A. Heavy steel boiler frame, built and stamped in accordance with the ASME boiler code.
Hot water boilers constructed as standard for operating pressures to 160 psi. Also
available for higher operating pressures. Steam boilers constructed as standard for
operating pressures of 15 psi or 150
psi. Also available for higher operating pressures. Large steam release
area for dry steam.
B. Water leg downcomers to insure rapid
G
internal circulation and temperature
equalization.
B
C. Bryan flexible water tubes, easily re-
placeable, requiring no welding or
C
A
rolling. Tubes installed from one side.
D. Boiler tube access panel bolted tightly
D
and sealed to boiler frame. Constructed of 2" insul-wool high temperature insulation in steel framework.
Tubes installed from one side for easy
E
accessible service and inspection.
E. Boiler jacket, heavy gauge zinc coated,
with attractive enamel finish. Boiler
jacket insulated with 1½" fiberglass to
insure cool jacket.
F. Atmospheric gas burner controls — alloy steel
atmospheric burner. Quiet electric ignition and operation.
No moving parts or complicated adjustments.
G. All controls, gauges, relief valve(s) are factory installed and wired and easily
accessible for servicing.
H. Control panel: all controls installed and connected to terminal strip.
H
F
Bryan K Series Boilers Standard and Optional Equipment
STANDARD EQUIPMENT
FURNISHED
Water Boiler
Combination thermometer and altitude
gauge, ASME Code rated boiler relief
valve, water temperature control (240°F
max std.), high limit control, probe
LWCO.
Steam Boiler
Combination low water cutoff and pump
control, auxiliary low water cutoff with
manual reset, high limit pressure control, ASME-rated safety valve, water
glass set.
Atmospheric equipment
Electronic combustion safety control,
automatic operating gas valve, safety
gas valve, pilot solenoid valve, electric
ignition assembly, main manual gas
shut-off valve, pilot shut-off valve,
pilot and main gas pressure regulators,
barometric draft controller, all controls
installed and wired standard voltage
120/1/60.
OPTIONAL EQUIPMENT,
EXTRA COST:
1. Manual reset high limit control
2. Manual reset low water cutoff
3. Auxiliary low water cutoff (water)
4. Combination low water cutoff
and feeder
5. Alarm bells or horns
6. UL, CSD-1, FM, IRI or other
insurance approved control
systems
7. Low fire start, Hi-Lo or
modulation fire control
8. Indicating lights, as desired
9. Lead-lag systems for two or
more boilers with or without
outdoor reset control
10. Heat exchanger coils for
domestic water
OPTIONAL
CONSTRUCTION:
Steam boiler
Optional construction to ASME
Power Boiler Code requirements for
pressure exceeding 150 psi to maximum of 300 psi design pressure.
Hot water boiler
Optional construction to ASME
Power Boiler Code requirements
for temperatures exceeding 240°
F and/or pressure exceeding 160
psi to maximum of 285° F operating and 300° F design temperature and 250 psi.
When ordering, please specify:
1. Boiler size
2. Supply and return
temperatures required
3. Boiler relief valve setting
4. Type of fuel: natural or LP
5. If gas, type, BTU content,
specific gravity and
pressure available
6. Optional extra equipment
or construction
7. Special approvals required
(UL, CSD-1, FM, or IRI)
8. Altitude
Bryan K Series Steam & Hot Water Boilers
STEAM BOILER DIMENSIONS—inches (cm)
ABCD E* F GH I J KL
BOILER Length
MODEL Over
K-350-S
K-400-S
K-450-S
K-500-S
K-550-S
K-600-S
K-650-S
Jacket Jacket Clearance Barometric Jacket Nozzle
1071/
4
(272.42) (137.48) (50.80) (313.06) (6.35) (15.24) (10.16) (5.08) (137.16) (81.28) (271.15) (212.71) (224.16)
117 59 24 133 2
(297.13) (149.86) (60.96) (337.82) (6.35) (20.32) (15.24) (5.08) (137.16) (81.28) (281.31) (212.71) (224.16)
1293/
4
(329.57) (166.05) (60.96) (370.21) (5.08) (20.34) (15.24) (5.08) (137.16) (81.28) (281.31) (212.71) (224.16)
1421/
2
(361.95) (182.25) (60.96) (402.59) (5.08) (20.32) (15.24) (5.08) (137.16) (81.28) (281.31) (212.71) (224.16)
1551/
2
(394.97) (198.76) (60.96) (435.61) (6.35) (25.40) (15.24) (5.08) (137.16) (81.28) (281.31) (212.71) (224.16)
165 83 24 181 21/2 NPT 10 FLG 6 FLG 2 NPT 54 32 1103/
(419.10) (210.82) (60.96) (459.74) (6.35) (25.40) (15.24) (5.08) (137.16) (81.28) (281.31) (212.71) (224.16)
178 891/
(452.12) (277.33) (60.96) (492.76) (6.35) (25.40) (15.24) (5.08) (137.16) (81.28) (281.31) (212.71) (224.16)
Flue Flue Ov erall Gas Train
Location Size Length Connection
541/
8
20 1231/421/2 NPT 6FLG 4 FLG 2 NPT 54 32 1063/
1
/2 NPT 8 FLG 6 FLG 2 NPT 54 32 1103/
653/
8
713/
781/
24 1453/
4
24 1581/
4
24 1711/221/2 NPT 10 FLG 6 FLG 2 NPT 54 32 1103/
2
24 194 21/2 NPT 10 FLG 6 FLG 2 NPT 54 32 1103/
4
2 NPT 8 FLG 6 FLG 2 NPT 54 32 1103/
2
2 NPT 8 FLG 6 FLG 2 NPT 54 32 1103/
Supply Nozzle
15# 150#
Connect.
Wid t h Min. Tube Height He ig ht Floor to
Feed
Outside Removal Over Over Flow
4
833/
4
881/
4
4
833/
4
881/
4
4
833/
4
881/
4
4
833/
4
881/
4
4
833/
4
881/
4
4
833/
4
881/
4
4
833/
4
881/
4
WATER BOILER DIMENSIONS—inches (cm)
ABCDE*FGH I J KL
BOILER Length
MODEL Over
K-350-W
K-400-W
K-450-W
K-500-W
K-550-W
K-600-W
K-650-W
NOTE: * Gas train and control location dimensinos will vary depending on job specifications and conditions.
Dimensions and specifications are subject to change without notice. Consult factory for certified dimensions.
Jacket Jacket Clearance Barometric Jacket Nozzle
1071/
(272.42) (137.48) (60.96) (313.06) (6.35) (10.16) (10.16) (122.56) (81.28) (247.65) (179.07) (186.89)
117 59 24 133 21/2 NPT 6 FLG 6 FLG 481/
(297.13) (149.86) (60.96) (337.82) (6.35) (15.24) (15.24) (122.56) (81.28) (247.65) (179.07) (186.89)
1293/
(329.57) (166.05) (66.04) (370.21) (5.08) (15.24) (15.24) (122.56) (81.28) (252.73) (179.07) (186.89)
1421/
(361.95) (182.25) (71.12) (402.59) (5.08) (15.24) (15.24) (122.56) (81.28) (257.81) (179.07) (186.89)
1551/
(394.97) (198.76) (76.20) (435.61) (6.35) (15.24) (15.24) (122.56) (81.28) (262.89) (179.07) (186.89)
165 83 30 181 21/2 NPT 6 FLG 6 FLG 481/
(419.10) (210.82) (76.20) (459.74) (6.35) (15.24) (15.24) (122.56) (81.28) (262.89) (179.07) (186.89)
178 891/
(452.12) (277.33) (76.20) (492.76) (6.35) (15.24) (15.24) (122.56) (81.28) (262.89) (179.07) (186.89)
Flue Flue Overall Gas Train Supply Return
Location Size Length Connection Nozzle Nozzle
4
541/
8
4
653/
8
2
713/
4
2
781/
4
2
24 1231/421/2 NPT 4 FLG 4 FLG 481/
26 1453/
28 1581/
4
2 NPT 6 FLG 6 FLG 481/
2
2 NPT 6 FLG 6 FLG 481/
30 1711/221/2 NPT 6 FLG 6 FLG 481/
30 194 21/2 NPT 6 FLG 6 FLG 481/
Bryan Steam LLC — Leaders Since 1916
783 N. Chili Ave., Peru, Indiana 46970 U.S.A.
Phone:765-473-6651 • Internet: www.bryanboilers.com
•
Fax: 765-473-3074
E-mail: bryanboilers@iquest.net
W i d t h Min. Tube He igh t He igh t Floor to
Outside Removal Over Over Flow
4
4
4
4
4
4
4
32 971/
32 971/
32 991/
32 1011/
32 1031/
32 1031/
32 1031/
2
2
2
2
2
2
2
701/
701/
701/
701/
701/
701/
701/
2
731/
2
731/
2
731/
2
731/
2
731/
2
731/
2
731/
2
2
2
2
2
2
2
Form No. 4950 ©2002 Bryan Steam LLC Printed in USA
13-4428
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