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Pumps (Hot Water Heating Circulator) The Rochester Circulator Company 3092 Culver Road, P. O. Box 23. . Rochester, N. Y. The Rochester Circulator, for Hot Water Heating Plants, Domestic Hot Water Systems, Ice Water Circulation, or for circulating any liquid in a pipe system under a balanced head Forced Circulation on every Hot Water Heating System represents the most mod ern method of obtaining efficient heating in all types of buildings. The equipment now,.. made available to the Heating Engineer : and Contractor, through the development of the Rochester Circulator, brings a re markable improvement in existing heating plants, whether they be open systems or equipped with the latest pressure regula tors. With the Rochester Circulator installed piractically full boiler temperature will be maintained through every part of every radiator and the boiler temperature^ will always be much lower than is possible without the Circulator. It is not necessary to maintain a big temperature differential between the flow and the return lines in order to secure circulation, while the effec tive average temperature at the radiator remains the same as before. This means much lower temperature of the. escaping flue gas, and a corresponding economy in fuel consumption. Room temperatures are maintained practically constant, as the de mand of the thermostat is met instantly in the radiator--there is no long time lag as invariably exists in a system depending on thermal circulation, pressure or otherwise. Every radiator, regardless of its position relative to the boiler, is maintained at practically full boiler temperature from end to end, and from top to bottom, even though that radiator be served by flow and return pipes dipping below the boiler level, as in a separate building. On new jobs the cost, including the Rochester Circulator, is less than without it, for the engineer has complete freedom in running his pipes past obstacles, etc., his calculations are greatly simplified, and usually smaller boilers and less radiation will amply take care of the maximum demand, due to the' increased operating efficiency of the system. On a sluggish system the Rochester Circulator is almost indispensible. ' The first cost of the Rochester Circula tor is low; its installation is very simple and inexpensive and its operating cost is very small. In fuel saving it will quickly pay for itself and its installation. It never interferes in the slightest degree with natural circulation, as the full area of all the flow or return pipes is maintained throughout. There are no flappers or check valves to corrode and stick. The Rochester Circulator is made for every different pipe size, from 1J4 to 12 in. All the return lines-, or in some cases, the flow lines, are brought through one tee of equivalent size, installed as an elbow, arid the Rochester Circulator screwed into the extra run opening of that tee, exactly like a pipe plug. Sizes and Capacities of Rochester Circulator ' Size and - Size of No. Tee Plug Nominal Motor Shipping Capacity H.P. Weight Gallons per Hour IV, 2 &'ft 1/20 1/20 24 25 . 450 750 Vi T>/v.\<fo3>h 1/20 26 3 3x2x3 2 1/20 27 1.500 2,700 v/i 3/2x2x3/2 2 1/20 28 5.120 4 4x3x4 3 1/10 45 ` 8.250 4Vi 5 V/&1A 3 1/8 . 47 10,000 3 1 Ki . 50 13.500 6 6x6x6, 6x3 Bush. 3 1/4 65 16,500 7 7x7x7, 7x3 Bush. 3 1/3 100 18.000 8 0x8x8, 8x3 Bush. 3 in 125 21.000 10 10x10x10, Flanged 3 3/4 250 25.500 12 12x12x12. Ranged 3 1 300 36,000 Note.--6, 7 and 8 in. Circulators are shipped mounted in the corresponding Standard bushings; 10 and 12 in. Circula tors are shipped mounted in Companion Flanges. The nominal capacities, given in the table above repre sent one-half the pitch velocities of the standard marine propellers, and are much lower than the capacities obtained . in actual average installations. . Write for-full data and prices. 764 Pumps Skidmore Corporation General Offices and Factory: 1535 Dayton Street, Chicago, U.S.A. Sales and Service Offices Atlanta, Ga. Baltimore. Md. Boston, Mass. Buffalo, N. Y. Charlotte, N. C. Chicago, III. Cincinnati, Ohio Cleveland. Ohio Dallas, Texas Denver, Colo. Des Moines. Iowa Detroit, Mich. Garnet, N. Y. Grand Rapids, Mich. Houston, Texas Indianapolis, Ind. Kanbas CnT, Mo. Little Rocs, Are. Los Angeles, Calif. Memphis, Tenn. Milwaukee, Wis. Minneapolis, Minn. Nashville, Tenn. New Orleans, La. New York. N. Y. Oklahoma Citt, Okla. Omaha, Nebr. Peoria, III. Philadelphia, Pa. Pittsburgh, Pa. Portland, Ore. Rochester, N. Y. Rockford. III. San Francisco, Calif. Seattle, Wash. Spokane, Wash. St. Louis, Mo. Tampa, Fla. Toledo, Ohio Tulsa, Okla. Canadian Representatives and Manufacturers--DARLING BROS. LTD.. Montreal, Que. Skidmore Vacuum Pump Interceptor base gives low water-line operation without pitting. Uriit sets directly on floor--no necessity of a concrete base. Occupies small floor space, simple in design and sturdy, high efficiency. Having no close clear ances, valves or gears, the Efficiency Remains Constant. Send for Bulletin 6 lUuetTaiion of Skidmore Condeneation Pump The Skidmore Condensation Pump The same high-grade construction as in our Vacuum Pumps: bronze fitted throughout, cast iron tank, ball bearings. Due to novelty in design, pump has lower water line control than many others which in many instances makes pitting unnecessary. Motor and float mounted high above danger of being submerged. Centrifugal pump is accessible without disturbing piping. Send for Bulletin No. 7 Capac- H. P. Motor Gallons Size ity Sq. Ft. IOLbJ20Lb. Roat Stops Gallons Per Minute Pumped Inlet Disc Weight 10# 20# C 71 2,000 M C 22 7.000 C 41 4.000 a C 47 4.000 C 61 6.000 I* C 62 6.000 C. 81 8,000 a C 8? 8 000 C10I 1,0000 a CI02 1,0000 CI21 1,2000 ft. ftCI27 1.2000 CI61 1.6000 CI62 1,6000 C261 2,6000 Vi C262 2,6000 C40! 4 0000 ift (J402 4.0000 ft ft Vi ft '/% y. Ve i 2 9 9 9 9 9 9 9 9 18 18 18 18 18 18 25 25 25 25 4 2m 1' 325 4 l" 1' 350 6 2' V 325 6 2* r 350 8 2- i* 325 8 r \* 3M 11 2m iy' 325 11 l" IV/ 350 13 IV/ 44t 13 IV/ 460 16 2'// IV/ 46C 16 2V/ IV/ 470 22 22 W 2ft' IV/ 46t IV/ 470 35 35 r Y iifftt'' 495 515 60 Y 7- 525 60 Y 2- 550 l'lhuitration of a Skidmore Automatic Vacuum Pump- Size Capacity of pq. Ft. of Pump Radiation Gals, of Water per Min. Motor H.P. 10 Lb. Motor H.P. 20 Lb. Size of Companion Ranges For Returns Size of Discharge to Boiler 0 ... | 2 3 4 5 6 7 5.000 8,000 16.000 26.000 40,000 65.000 100.000 150.000 8 11 22 35 60 90 150 200 y 1 1 IV, - 2I'"// - IV, 2 23 2W . y 35 y 5 mY 7V, 10 Y 10 15 Y .. 1' i1// i'// i'// 2" 2? 2ft' pressure furnished on request. 765