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Specialties, Heating Armstrong Machine Works 851 Maple Street Three Rivers, Mich. Exclusive Manufacturers of Armstrong Inverted-Bucket Steam Traps ARMSTRONG Atlanta, Ga., J. M. Tull Metal & Supply Co., Inc., 285 Marietta St., N.W. Baltimore, Md., Milby & McKinney, 116 Light St. Birmingham, Ala., Southeastern Products Co., 1401 Lomb Ave. Boston, Mass., Files Steam Specialty Co., 261 Franklin St. Buffalo, N: Y., Herr Steam Specialty Co., 360 Warwick Ave. Charleston, W. Va., Baldwin Supply Co., 518 Capitol St. Chicago, 111., Barrett-Christie Co., 10S-112 N. Clinton St. Dallas, Texas, Geo. B. Allan & Co., North Texas Bldg. Denver, Colo., Hendrie-Bolthoff Mfg. & Supply Co., 1637-17th St; Des Moines, Iowa, E. B. Carr, 307 Securities Bldg. Detroit, Mich., A. F. Squier, 2910 National Ave. Duluth, Minn., John E. Smith, 1720 W. Superior St. Erie, Pa., Coblentz Equipment Co., 1119 Peach St. Evansville, Ind., Evansville Supply Co., Esco Bldg. Fond du Lac, Wis., A. N. Goff, 94 Eighth St. Honolulu, T. H., The von Hamm-Young Co., Ltd. Indianapolis, Ind., Indianapolis Belting & Sup ply Co., 34 S. Capitol Ave. Kansas City, Mo., Hughes Machinery Co., 342 Mfrs. Exchange Bldg. Knoxville, Tenn., Leinart Engineering Co.. 311 W. Cumberland Ave. Los Angeles, Calif., Guy L. Warden, 114 West 17th St. Louisville, Ky., Graft-Pelle Co-, 309 W. Main St. Memphis, Tenn., The Power Equipment Co., 1352 Madison Ave. REPRESENTATIVES Milwaukee, Wis., Hamacher & Williams 2540 W. Wells St. Minneapolis, Minn., Albert C. Price Co. 257 Fourth Ave., South. Montreal, Quebec, Preston, Phipps Inc 955 St. James St. W. New Orleans, La., Louisiana Steam Equipment Co., 109 Tchoupitoulas St. New York, N. Y., Advance Engineering Co. 69 Dey St. Philadelphia, Pa., Brogan & Co., 810 Race St. Phoenix. Ariz., John W. Ladlow, Box 1784. Pittsburgh, Pa., R. S. Eastman Co., 222 First Ave; Portland, Ore., Heating and Ventilating Equip ment Co., 927 S. W. Oak St. Richmond, Va., A. T. "Shepherd, 411-12 Tenth St. Bldg. St. Louis, Mo., O'Brien Equipment Co..- 2726 Locust Blvd. Salt Lake City, Utah, Lee, Pace & Turpin,. 144 S. Fifth West St. San Francisco, Calif., Refrigerating S: Power Specialities Co., 380 Brannon St. Seattle, Wash., Heating & Ventilating Equip ment, Inc., 500 First Ave., South. South Bend, .Ind., Smith-Monroe .Co.,"'1912 S. Main St. Syracuse, N. Y., The Hopton Co., 321 Denison Bldg. ` Tampa, Fla., G. W. Neale, 404 Morgan St. Toronto, Ont., Arthur S. Leitch Co., Ltd., 1123 Bay St. Vancouver, B. C., General Equipment, Ltd. 319 W. Pender St. Winnipeg, Man., Kipp-Kelly, Ltd., 6$ Higgins Ave. Wooster, Ohio, Steam Economies Co., 1011 Beall Ave. Armstrong offers two types of traps for heating, air conditioning, and steam distri bution service. Standard Inverted Bucket Traps, the type originated by Armstrong, are non airbinding and self-scrubbing. They are used for Tow, medium, and high pressure duty where relatively little air must be handled along with the condensate. Their free-floating lever design makes it possible to open very large discharge orifices com pared with the size and weight of the trap itself. Armstrong Blast Traps are used where large amounts of air must be vented quick ly when steam is first turned on. The Armstrong Blast Trap (illustrated on next page) consists of a standard inverted bucket trap with a large auxiliary air vent controlled by a piece of rustless thermo static bi-metal. When the trap is cold, the Auxiliary vent is wide open, allowing air and condensate to blow right through the trap. When steam reaches the trap, the auxiliary vent closes, allowing the bucket to float and close the main valve after the condensate has been discharged. The Armstrong Blast Trap has several advantages over the conventional float and thermostatic trap, 1. The Armstrong Blast Trap has but a single orifice to be maintained tight against the full pressure differential. The pressure differential across the auxiliary air vent amounts to only 1 ini. to 4 in. of water. 2. Positive action. The discharge valve in an Armstrong Blast Trap is either wide 1082 Armstrong Machine Works Specialties, Heating open or tight shut. Fast opening and fast closing prevent wire-drawing. 3. Handles dirt. There are no dead spots in an Armstrong Trap in which dirt can settle and interfere with the operation of the trap. No blow-down valves are necessary and ordinarily no strainers are required ahead of Armstrong Traps. 4. The wearing parts in all Armstrong Traps are identical in design, material, and precision workmanship with parts used in Armstrong Forged Steel Traps for pres- . sures up to 1500 lb gage and total tempera tures of 850 F. At ordinary heating pressures, Armstrong Traps last many years without any maintenance expense whatever. Armstrong Steam Trap Book. This 32 page book gives complete information on all sizes and types of Armstrong Traps. It also contains 15 pages of data on the subject of trap selection, installation, and maintenance. A free copy will be mailed no request. Service Organization. Satisfactory se lection and operation of all Armstrong Traps is assured by 43 district representa tives in the United States, Canada, and Hawaii. Stocks of. Armstrong Traps are carried in all large cities.. THE ARMSTRONG BLAST TRAP The above picture shows how the Arm strong Blast Trap works when steam is first turned on. Note that the auxiliary vent in the top of the bucket is wide open. Air and water are free to rush straight through until steam comes in and causes the bi-metal strip to bend upward closing the auxiliary vent with the small flat disc. Thereafter it works the same as the standard trap. Sizes, Capacities and List Prices of Armstrong Traps -'Trap Size Pipe Connections................ . List Price (Regular)............... List Price (Blast Trap).......... Telegraph Code (Regular)... Telegraph Code (Blast Trap), Diameter................................... Weight...................................... Maximum Pressure................. 5 2 50Continuous discharge capacity in U> of water per hour at pressure indicated. For more complete information, see the a 10 15 20 30 Capacity Chart in the Armtrong Steam Trap Book. a. 70 a 100 J125 'If Yi in. connections are 150 desired, order No. 202 for 200 straight way of No. 203 for 250 angle. No. 200 and 201 450 560 640 690 500 600 660 650 660 No. 21 840 1000 1080 890 970 840 940 880 960 820 900 N6. 212 1560 1900 2060 1800 2050 1840 2030 1840 2040 1530 1680 No. 213 No. 214 No. 215 No. 216 3000 3500 3900 3100 3600 3750 3700 3400 3880 3500 3200 3500 r $29.00 $31.50 I'orli// li//or 2* $38.00 $55.00 $40.50 $60.00 Hemlock Larch Tamarack Hemlette 7W 32 Lb 250 Larette 14' 8i// 47 Lb 250 Tamrette 16VV 10*/ 76 Lb 250 4600 5600 6300 5900 6600 6200, 6100 6300' 6700 5900 5400 5700 7600 9100 10,000 8500 9800 8900 9200 10,400 10.900 9500 9500 10,200 14.300 17,200 19,000 18,200 17,600 18,200 18.500 18,500 20,400 18,600 17,400 19,000