Document G6Oz6jOEoLLeLMpJ72gnD2NZY

Air System Equipment Fans asd Blowers Alan E. Burden Co., Inc. Manufacturer of Propeller Type Fan Blades 1940-50 Pontius Ave., Los Angeles 25, Calif. For Air Conditioning Refrigerating and Heating Applications All Burden Fan blades are individually inspected after leaving the production line for bore size with "go and no-go" gauges, to a tolerance of plus or minus one Koooth of an inch. Each fan blade is individually gauged on a special machine for contour and alignment, then statically and dynamically balanced with Mechanical, Audio Vibration equipment. A modern, completely equipped laboratory makes possible exhaustive performance tests. Expert engineering counsel is available for requirements involving unusual applications. A laboratory at the factory is equipped for both routine and special testing when necessary. BURDEN 3 BLADE FANS. Furnished clockwise and counter-clockwise. Diam eter range, 10 in. to 24 in. with variations of pitch of from 6 deg to 42 deg in incre ments of 1 deg. Hubs front or back. Standard spiders cadmium plated. Blades aluminum, commercial bright. BURDEN 4 BLADE FANS: Furnished clockwise and counter-clockwise. Diam eter range, 10 in. to 24 in. with varia tions of pitch of from 6 deg to 42 deg in increments of 1 deg. Hubs front or back. Spiders cadmium plated. Blades alumi num, commercial bright. BURDCO REVERSIBLE, INTER CHANGEABLE HUBS: Designed for special Burden blades produced with uniform size openings. Hubs produced in six bore sizes can be quickly adapted to front or back and keyed firmly into place with a positive locking device. They are adaptable to 3 or 4-blade fans, clockwise or counter-clockwise in all variations of pitches. BURFLEX HUBS: Are similar to the Burdco reversible, interchangeable type with the added feature of a specially de* signed noise insulating grommet, con* structed to fit over the hub in apphca` tions where lessened vibration and d*?' ening of sound are desired. Insulated hu absorbs motor noise. Information sen on request. 1366 Air System Equipment Fans and Blowers Century Fan & Ventilator Co., Inc. 45 Cedar Street, Stamford, Conn. Installed in boiler breeching, maintains draft of preselected intensity for auto matically fired fuels. Eliminates high stacks. Operation is completely automatic and quiet.. Draft selection is manually adjustable to suit requirements. Regardless of burning rate or outside atmos pheric conditions, selected draft will be held to within plus or minus .01 in. W.C. Factory assembly reduces installation and wiring costs. Accurate control of over-fire draft by modulation of fan outlet damper pro vides maximum burning efficiency, eliminates standby-losses and increases the life of boiler. Damper is closed while burner is off. Exclusive ADJUSTABLE START and LO-DRAFT CUT-OFF, insures safe starting position of damper, smooth light-off at low fire setting, and safety shut down in event of draft failure for any reason. After safe light-off the damper automatically modulates with flame. BUILT-IN manual selector switch permits full-open damper for sootblowing. Controls are approved, by "UnderuoHiers Laboratory." Inducer No. Hp Max Rpm Tip Speed CFM-70 Degrees Standard Air Gal Per Hr H-Sp. ' Sp. 1* Sp. iM'Sp. @ H* Sp. 112 ASC 115 BSC 118 BSC 121 ASC 124 ASC 127 ASC 130 ASC 133 ASC 136 ASC H Vi H 1 m 2 3 3 5 1380 1260 1300 1200 1050 946 840 740 720 4340 4950 6100 6600 6600 6600 6600 6400 6750 1100 2100 3000 4000 5500 7300 9600 11500 15000 1000 3900 2800 3700 5300 7200 9300 11300 14500 700 1600 2500 3500 5100 6900 8850 10700 14000 1400 2300 3300 4800 6300 8450 10350 13600 12.7 23.3 35 46 66.2 90 112 136 174 Approximate Burning Rate 80 Cfm Per Gal Of Oil Per Hr. May also be supplied without Automatic Controls. And with 2 ot 4 Speed Motor. Dynamically and statically balanced, compact and systematically designed. Very quiet and efficient. Ideal for school and hospital buildings. Copper, galvanized and aluminum hous- CENTURY CYCLONE ROOF FAN Rated in accordance with test code as adopted by NAFM and ASHVE. Fan Sise 16" 19 22 25 28 31 34 37 43 50 56 Fan Rpm 1140 960 1070 900 850 750 790 600 620 540 510 590 390 500 440 500 410 400 345 350 300 300 265 280 240 Motor Hp w H Vi H Vi Vi ] Vi H H Vi 1 Vi m 1 m 1 2 lVi 3 2 3 2 3 2 Fan Tip Speed 4460 3760 5040 4230 4675 4120 4960 3760 4390 3820 3595 4840 3065 4330 3815 4710 3995 4390 3785 4390 3770 4240 3745 4400 3750 ' Capacity Table Cfm F.A. Cfm W 1565 1320 2610 2380 3680 3385 4680 4055 5670 5000 4745 7160 5000 8600 7640 10920 9130 13920 12240 17900 15440 23060 20660 27030 23900 1460 1205 2500 2200 3520 3280 4460 3660 5335 4615 4325 6800 4415 8360 7335 10640 8770 13460 11600 17120 14470 22280 19830 25800 22560 Cfm V4' 1310 1050 2340 2100 3355 3120 4220 3260 5015 4160 3800 6620 3820 8160 7065 10320 8400 13000 11020 15890 13100 21550 19060 24700 21490 1367 Cfm W 1120 855 2220 1895 3190 2790 3910 2740 4705 3785 3315 5930 3030 7990 6800 9550 7680 12470 10250 14900 11830 20150 17730 23100 20050 Cfm Vi* 1020 730 2030 1620 2945 2510 3705 2270 4145 2965 2430 5510 7500 6185 8830 6870 11630 8960 13530 10300 18800 16140 21800 18200 Cfm H' 755 1770 1310 2530 1880 3290 1630 3520 2050 4920 6680 5060 8080 5920 9720 7080 12070 8500 16950 14100 19000 14900