nt) pbBCI$ iiiiiiil^^giii wmm i:|it::r:| m i ll' i“t .:iV: r:^e mmmr „r- „ i isj ■~rJx "Z^M “ '\’ J > jjj^HBli^p?^ r u: fuAMt tiTT L**JK9^ 41 .4 1 « i W’ sjttfej ‘SUl r : r ri ^» m- ..i-.....cT(..,.ir..j., Know How This is not a mere catalog — it is a ready reference book on the McAlear System of Vacuum and Vapor Heating. It has been prepared as the result of twenty-five years actual experience — it contains in detail a complete description of the McAlear System and appliances — it is an authoritative text book on the Science of Steam Heating for all classes of buildings. This book is dedicated to every one who comes in contact with heating problems. On page 3 you will find an outline of the unequalled McAlear Service which we are prepared to render you free of charge — also our Ironclad Guarantee of Satisfaction. THE McALEAR MFG. CO. 223 West Erie Street CHICAGO DISTR'CT sale^. cafice, 705 OJRAY CUlLDIiSIG, i S; MCALEAR SYSTEM The Result of 25 Years of Experience In presenting this Catalog to building owners, archi¬ tects, engineers and steam heating contractors, particular attention is called to the fact that the McALEAR SYS¬ TEM is not an experiment—it is the result of an organi¬ zation extending throughout the United States and Can¬ ada, including a special engineering staff composed of some of the best engineers in this country, who have for the past twenty-five years specialized in the science of Vacuum and Vapor heating. Our organization is ready to prove to your entire satisfaction that we have mastered the problems of de¬ signing, and superintending complete installations of power and heating equipment for any and all classes of buildings. Upon request we will furnish ^mu with a list and de scriptioii of all classes of buildings in which our system is being successfully operated. In addition, on page 3 you will find our Iron Clad Guarantee to replace Free of Charge any defective parts of any materials furnished by us. With tlie tenants of buildings constantly demanding better service—and the cost of fuel soaring upwards—in selecting any steam heating system the first cost is not the only cost to be considered—you must take into con¬ sideration the equally important questions of low cost of operation, prevention of leaks and losses, minimum ex¬ pense for repairs, maximum durability, absolute noiseless¬ ness as well as safety, comfort and economy—and this is what we claim and can prove for the McAIjEAR SYSTEM. Me Alear Service Unequalled Engineering Advice—Specific Information Full Co-operation—FREE Under the Me Alear System you are not offered merely patented applianees—you have the right at any time to ask for and reeeive cheerfully the services of our special Engineering Department, eom- posed of some of the best engineers in this country-—men who for the past twenty-five years have given their entire time and attention to the solving of engineering problems, designing and superintending com¬ plete installations of power and heating equipment for any and all classes of buildings. Engineers, architects, steam heating eontractors and building own¬ ers find it saves time and is profitable to use this serviee, why not you? Our Engineering Department is thoroughly competent to give en¬ gineering adviee and specific information on all subjects pertaining to the mechanical equipment of buildings and this service is combined with quality and efficieney, an asset, and is free to you for the asking. Submit your problems to us and we will advise you the best method to work them out for the least expenditure of money—always keeping in mind the question of efficiency which is being constantly strived for by all successful men and corporations. You are familiar with the old saying, “A teaspoonful of foresight is worth a barrel full of hind¬ sight,—ASK US. Iron Clad Guarantee of Satisfaction Knowing from actual experience on thousands of buildings that the McAlear System if properly installed will give absolute satisfaction and that our specialties will perform their respective functions in a very effieient and satisfaetory manner—we do not hesitate to make this Iron Clad Guarantee. We will replace FREE OF CHARGE any defective parts of any material or materials furnished by us, provided that such defective material is reported to us within a reasonable length of time from the receipt of the goods or the date of installation. In addition, we also GUARANTEE our Vacuum Pumps, Thermo Vent Automatic Air Valves and Perfeetion Radiator Traps to be ABSOLUTELY AUTOMATIC and NOISELESS in operation and to handle water and air in any quantities up to their rated capacities. THE MeALEAR MANUFACTURING COMPANY 223 West Erie Street, Chicago, U. S. A. 3 Front view of the MeAlear Automatic \"acuum Pump. (Patented and Patents Pending) In ordering repair parts, refer to numbers, pages (i and 7. We do not furnish with pump any of the piping or fittings sliown in light lines, except the vacuum and steam gauges. 4 Back view of tlie McAlear Automatic Vacuum Pump. (Patented and Patents Pending) In ordering repair parts, refer to numliers, pages 6 and 7. We do not furnish any of the iu))e connections or fittings shown in light lines, except the vacuum and steam gauges. 5 Side view of Pump Head. List^of Parts NAME AND NUMBER OF PARTS. 1 Pump Cylinder 13A Disc Holder Nut 2 Supporting Head 14 Lower Diaphragm Plate, large 3 Nipple 15 Lower j^art of Diaphragm Casting- 4 Steam Valve Body 16 Bolts 5 Union Tail Piece 17 Upper part of Dia 2 )hragm Casting 6 Union Nut 18 Rubber Diaphragm 7 Union Coupling- 19 Upper Diaphragm Plate, small 8 Valve Bonnet 20 Lock Nut 9 Valve Stem 21 UpjJer part of Valve Stem 10 Stem Head 22 Spring for Steam Valve 11 Disc Holder Ring 23 Brass Cap 12 Disc Holder 24 Spring Holder 13 Composition Disc 25 Adjustment Nut 7 VACUUM (y ♦ 26 Union Elbow 37 Union Nut 28 Union Tailpiece 29 Nipple 30 Nipple 31 Elbow 32 Nipple 33 Tee 34 Nipple 35 Nipjjle 30 Union Tail Piece 37 Union Nut 38 Union Ell 39 Pilot Valve Disc 40 Pilot Valve Spring 41 Cap for Pilot Valve 42 Pilot Valve Body 43 Pilot Valve Bonnet 44 Pilot Valve Bracket 45 Ni])ple 46 Elbow 47 Union Nut 48 Union Tail Piece 49 Nipple 50 Cap Elange over Si)ray Pipe Open¬ ing 51 Spray Plug 52 Spray Tube 53 Spray Plate Stem 54 Spray Nozzle 55 I.ock Nut 56 Spray Plate 57 Cap Screws 58 Brass Cap 59 S])ring for Water Valve 60 Upper part of Diaphragm Casting 61 I.ock Nut 62 Upper Diai)hragni Plate, large 63 Up])er part of Diaphragm Casting 64 Rubber Diaphragm 65 Bolt 66 Lower part of Diaphragm Casting 67 I>ower Diaphragm Plate, small 68 Stuffing Box 69 Stuffing Box Nut 70 Union Nut for Water Valve 71 Valve Stem for Water Valve 72 Valve Bonnet for Water Valve 73 Stem Head 74 Disc Holder Ring 75 Composition Disc 76 Disc Screw 77 Water Valve Body 78 Nipple 79 Strainer Tee 80 Strainer Plug 81 Strainer Basket 82 I>ock Nut for Pilot Valve Bonnet 83 Stuffing Box for Pilot Valve Bonnet 84 \'alve Stem for Pilot Valve 85 Lock Nuts for Pilot Valve Stem 86 Adjustable Piston Plate 87 Key for Operating Water ^’alve 88 Lock Shield Stuffing Box 89 ^^alve Bonnet 90 Needle Valve Body 91 Needle Valve Stem 92 Nipple 93 Nijiple 94 Sj)ray Pipe for Tliermostatic Disc 95 Separating Spiders 96 Thermostatic Discs 97 Nipple 98 Flange for Water Seal Trap con¬ nections 99 Nipple 100 Pipe Connection to Water Seal 101 Air Check Valve Body 102 Air Check Valve Cap 103 Air Check Valve Disc 104 Air Check Valve Hinge 104A Air Check Valve Hinge Nut 105 Air Check Valve Union Nut 106 Air Clieck Vah^e Tail Piece 107 Nipple 108 Nipple 109 Nipple 110 Elbow 111 Nipple 112 Discharge Cheek Valve Body 113 Discharge Check Valve Disc 114 Discharge Check Valve Hinge 114A Discharge Check Valve Hinge Nut 115 Discharge Check Valve Union Nut 116 Discharge Check Valve Tail Piece 117 Discharge Check Valve Cap 118 Water Seal Trap 119 Supporting Leg 120 Supporting Band 121 Discharge Pipe 122 Drain 8 i I 9 VACUUM vapor>heat Operation of the McAlear Automatic Vacuum Pump and its Advantages So that you will understand how simple and easy is the operation of The McAlear Automatic Vacuum Pump and why it cannot fail to live up to the claims we make for it^ here is a brief outline of the facts. The Pump consists of a large eylinder which stands vertically on a substantial base. On top of the cylinder is mounted the Automatie Valve mechanism to which all air, steam and water eonnections are made. The air connections consist of the vacuum air lines, whieh conneet with all of the air valves on the radiators throughout the building or plant, as here¬ after outlined and described in the specifications. Pages 33 to 35 inclusive. The steam for operating the pump is taken from low-pressure heating main or from boiler direet (if operated low-pressure), and connected to the steam valve, which is made a part of the Automatie Valve mechanism referred to above. The water for condensing purposes is taken from the city water pressure and connected to the Water Valve, which is also made a part of the Auto¬ matic Valve mechanism. One of the McAlear advantages lies in the fact that all of these connections are controlled and operated by means of the Automatie Valve mechanism and Thermostatic motor, mounted on top of cylinder, as outlined above. The Operation. When the Pump is in operation, steam enters the cylinder through steam valve and forees the air contained therein out through the discharge pipe at the bottom into the water seal trap. After the air is completely discharged from the cylinder, a small amount of steam passes from the cylinder into the water seal trap and from this point it is carried up through a pipe to the Thermostatic Motor chamber causing the Thermo- statie disc to expand and open a valve which permits the city water pres¬ sure to be exerted on the diaphragms of the steam and water valve simul¬ taneously closing the steam and opening the water valve, thereby admitting water to the cylinder in the form of a SPRAY, condensing the steam or vapor contained therein, produeing a vacuum—a very simple, economical and positive method. Enormous Reserve Power. Thus, you see, an exceptionally high vacuum is produced almost instantly—and any experienced engineer will tell you that there is no greater or MORE POSITIVE method of producing a vacuum than by the condensation of steam when it is enclosed in an air tight cylinder such as we use in the manufacture of our pumps. Taking these facts into consideration, also the eapacity of our different sizes of pumps, you will readily see that we have an enormous RESERVE POWER on hand to meet any and all emergencies. Simple and Effective. While the water is entering the eylinder in the form of a spray, it is also admitted to the thermostatie motor for the pur¬ pose of cooling and reducing the pressure therein. When this is accom¬ plished, the spring above the valve disc will automatically close the water valve. 10 H EAT I N G- *7y\5,/S^LEKRI ■> ^PECIALTl E5 The vacuum produced by the pump is sufficient at this point to hold the steam v^alve closed by its passing from the Pump Cylinder through small port holes in the Steam Valve bonnet to under side of diaphragm, holding it in a locked position with the steam and water valves closed. The valves will remain closed until the vacuum in the cylinder drops to four or five inches, at which point the spring over steam valve diaphragm will release the valve and allow it to open, thereby permitting the steam to again enter the cylinder and drive the air pulled from the system by the ])revious stroke, out through the discharge at the bottom. After the air is all discharged, steam will again enter the thermostatic motor, closing the steam valve and opening the water valve, allowing the pump to complete another stroke, as hereinbefore outlined. The Power Plant. The Thermostatic Motor is the power plant of the ])ump—it gets its thermostatic action from the volatilization of a liquid con¬ fined in a number of metal discs with flexible walls. The laws governing the volatilization of liquids are immutable and discs of this construction can always be relied upon to do the same work when operated under the same temperatures. The power produced by the discs is always in direct proportion to the temperatures to which they are sub¬ jected. This power is directed in such a manner as to make the upward and downward strokes of the pump POSITIVE and QUICK. Every move¬ ment is absolutely controlled by the Thermostatic Motor, insuring a positive action which is absolutely automatic and reliable in every way. One of the big advantages of the Thermostatic Motor is that it is actu¬ ated by temperatures—the hot vapor or steam is brought in contact with th(‘ motor, thereby creating sufficient pressure and power to invariably open tlu* Pilot Water Valve, closing the steam valve and opening the water valve simultaneously, permitting the water to enter the cylinder and thermostatic motor at one and the same time, thus causing the condensing of the steam in the cylinder and the cooling of the thermostatic motor, thereby reducing the pressure and allowing the springs to close the valves. Steam Power. The minimum steam pressure required to operate the })ump is from one-quarter to one-half pound above the atmosphere. This ])ressure is only necessary when the pump is discharging. After the pump lias produced a vacuum of twelve to fifteen inches and the piping system is reasonably tight, it may be some time before the pump will be called upon to make another stroke. During this time, the entire heating system, including the boilers (if the plant is operated low-pressure), can be run under a vacuum. The only time that steam pressure is necessary is when the pump is discharging and then a slight pressure above the atmosphere is all that is required. The Pump will operate on any pressure from one-half pound to a maxi¬ mum of ten pounds. Water Pressure. The water pressure required for the pump varies from a minimum of ten pounds to a maximum of fifty pounds. If the city water pressure exceeds fifty pounds, there should be placed in the water supply to the pump, a pressure reducing valve to reduce the pressure to below fifty pounds. 11 VACUUM 6^ ♦ M l vapor heat A very important characteristic of the McALEAR Automatic Vacuum Pump not to be found in any otlier apparatus used for tlie same purpose is the fact that tlie pum}) continues to ])erform its work after the thermostatic motor has closed tlie steam and water valves. This is accomplished by the large cooling surfaces of the cylinder, which continues to condense any vapor or steam that may remain therein, tlierehy increasing the vacuum and remov¬ ing the air from the system long after the ]mmp is apjiarently out of service. Another characteristic of the ^leALEAR Pump is the powerful impulse or ])ull that each stroke has. This is so noticeable that in starting the plant in the morning, only a few strokes of the pump are necessary to entirely ex¬ haust all the air from the heating system and to circulate steam through the farthest radiators and most remote parts of the plant as quickly as those nearest the pump and boiler. This is due, however, to the enormous capacity and displacement of the McALEAR Pumps. These pumps perform their work on large plants equally as well as on small, as the efficiency increases in proportion as the speed of operation decreases. This is accounted for by the exposed condensing surfaces of the cylinders, which can be readily dem¬ onstrated by closing the valve in the air-line connection at the pump, allowing it to make a stroke. When the stroke is completed, you will find that the pump has produced a vacuum of fifteen to eighteen inches and that this vacuum will continue to increase for a period of fifteen to twenty minutes after the steam and water valves are closed and the pump is apparently out of service. It would be impossible to accomplish this with any other make of pump, as the vacuum produced woidd almost immediately disappear if the pump was shut down for a period of five or ten minutes. Thus, you will see why we claim such high efficiencies and low cost of operation. There is no other pump manufactured that has the capacity for handling and exhausting air in large volumes from a heating system as the McALEAR Pump. It is absolutely automatic, starting and stopping when needed and performing its work without tlie aid of outside power. It is the only pump in existence that has for its power plant a thermostatic motor actuated by the tempera¬ ture of steam and water. The McALEAR Automatic Vacuum Pump is positive and quick in action, simple and economical, and when in operation, does its work with eighty per cent less power than any other pump handling the same amount of air and doing the same work. It is adaptable to all kinds of steam- heating plants whether they be office buildings, public buildinggs, industrial plants or small residences. If ^^ai’ties interested will only investigate the different vacuum systems of heating now in use, they will be fairly con¬ vinced that we have the simplest and most effective vacuum-producing ap- jiaratus manufactured for the automatic removal of the air and water from a heating system. 12 H E A T I N G- « 7 V\ C ^ LEAR ♦■SPECIALTIES McAlear System The Biggest Forward Step in the Science of Steam Heating There was a day when a heating system siin})ly consisted of a boiler, ])ipes and radiators—but that day is gone forever. So important is the problem of heating homes, stores, factories, and ))ublic buildings, tliat it has attracted to it the best eng-ineering and mechan¬ ical brains possible to obtain. Thousands upon thousands of dollars and years of labor have been devoted to solve this most important problem, and as a result wonderful progress has been made. The old method of selecting a steam heating S3\stem entireh’ on the initial cost basis, regardless of the cost of operation afterwards, has proved so expensive and so unsatisfactorv in the results obtained that today although the cost of apparatus for the use of steam heat is greater, the econom\" in its use more than justifies the increased initial expense. We will all agree that the hot water was a marked improvement over any previous sj^stem, but since the systems of vacuum and vapor heating have been perfected as demonstrated in the McAlear Sj^stem, the hot water method of heating is rapidU^ becoming a thing of the past. Vacuum Heating the Perfect System Since the introduction of the Vacuum and Vapor Systems of lieating. and their general adoption by the engineering profession, it has proved to be the best for residences, office buildings, churches, and industrial plants which in former years were equipped with either hot water or steam pres¬ sure systems. The fact that eigliW-five per cent of such buildings are now being equipped with Vacuum or vapor systems proves bevond a shadow of a doubt that this method of heating is fundamentally correct and has come to stay. All noted authorities on the science of heating agree that steam in¬ herently affords the best, the most satisfactory^ the most elastic and depend¬ able and the most economical method of heating. Here are some facts in regard to the advantages of steam that are indisputable. 13 I VACUUM 6- VAPOR HEAT The temperature at which steam is given off from boiling water varies in accordance with the boiling point of the water itself. This boiling point varies in accordance with the pressure on its surface. In an open vessel, and at sea level, water will boil at 212° Fahrenheit. Under these conditions, the pressure on the surface of the water is the weight of a column of air one square inch in section, or actually 11.7 pounds above absolute vacuum. An increase in the pressure on the surface of the water raises the temperature of the boiling point, while a decrease in the pressure lowers the temperature. The following table illustrates how these variations take place. Pressure (1) Boiling Temp. Degrees Fahr. (2) Total Heat above 32° Fahr. B. t. u. (3) Heat Given off in Condensing B. t. II. (4) Relative Volume of Water at 39.1°—! (5) N'aciuim in Mercury 16" 175.8 1135.8 992.0 3380 15" 178.8 1137.0 990.2 3163 14" 181.8 1138.2 988.4 2982 13" 184.5 . 1139.4 986.8 2821 ■ 12" 187.2 1140.5 985.2 2677 11" 189.8 1141.4 983.6 2547 10" 192.2 1142.3 982.0 2429 9" ' 194.5 1143.2 980.6 2321 8" 196.8 1144.1 979.2 2222 7 " 198.9 1145.4 977.9 2131 6 " 200.9 1145.8 976.6 2047 5 " 202.9 1146.6 975.4 1967 4" 204.9 1147.2 974.2 1897 3" 206.7 1147.9 973.1 1820 2" 208.5 1148.6 971.9 1758 1" 210.3 1149.3 970.7 1700 Atmosphere 212.0 1150.0 968.7 1646 1 lb. 215.3 1151.2 967.6 1548 2 lbs. 218.5 1152.4 965.6 1460 3 lbs. 221.5 1153.6 963.6 1382 4 lbs. 224.4 1154.6 961.8 1312 5 lbs. 227.1 1155.5 960.0 1249 6 ll)s. 229.8 1156.5 958.2 1192 7 lbs. 232.3 1157.4 956.6 1141 8 lbs. 234.8 1158.3 954.9 1084 9 lbs. 237.1 1159.0 953.3 1051 10 lbs. 239.4 1159.8 951.8 1050 ) HEATING- ♦ SPECIALTIES It will readily be seen by a study of columns two (2) and three (3) that water under a vacuum of nine inches will boil at and that the steam generated therefrom contains a total of 1143.2 units of heat. Column four (4) shows the number of units of heat given off by the steam when condensed, the water having a temperature equivalent to the boiling point. It will he further noted from table that, with a 10-pound pressure above atmosphere, water will require 239.4° before it will boil. This table demonstrates very plainly that steam can be generated (in a vacuum) below 212°, the usual boiling point; and with a McALEAR System this low-pressure steam can he circulated throughout the entire heating jolant by means of the JNIcALEAR Automatic Vacuum Pump, which produces a vacuum on the boilers and radiators as well as the air-line, and entire system of supply and return mains. Therefore, it is readily seen why vacuum heating systems are supplanting hot-water, as steam when used in connection with the McALEAR System can be circulated at about the same temperature as hot w^ater, giving the advantage of quick heating and cooling for the mild weather in spring and fall, which points are decidedly in favor of steam and the McALEAR System. Properties of Saturated Steam Pressure or Vacuum Pounds per sq. in. Tempera¬ ture Heat of the liquid —12 137 105 —10 160 128 —8 175 143 —6 187 155 * —4 197 165 —2 205 173 0 212 180.9 1 215 184 2 219 188 3 222 191 4 224 193 5 227 196 10 239 208 15 249 218.8 20 258.7 228 25 266.7 236.2 30 273.9 243.5 35 280.5 250.2 40 286.5 256.3 45 292.2 262.1 50 297.5 267.5 55 302.4 272.6 60 307.1 277.2 65 311.5 281.8 70 315.8 286.1 75 319.8 290.3 80 323.7 294.3 85 327.4 298.1 90 330.9 301.8 95 334.4 305.4 100 337.6 308.9 110 343.9 315.4 120 349.8 321.5 130 355 327.5 140 360 333.5 150 365.7 338.3 Latent Heat Total Heat Volume of lb. of stea cubic feet 1019 1124 135 1003 1131 78.3 992 1135 55.9 984 1139 43.6 977 1142 35.8 971 1144 30.6 965.7 1146.6 23.30 964 1148 25 961 1149 23 959 1150 22.3 957 1150.5 21.2 955 1151 20.16 946 1154 16.3 939.3 1158.1 13.7 932.5 1161 11.85 927.1 1163.3 10.36 922 1165.5 9.34 917.3 1167.5 8.45 913 1169.3 7.73 909 1171.1 7.11 905.2 1172.7 6.61 901.6 1174.2 6.16 898.4 1175.6 5.77 895.1 1176.9 5.43 892.1 1178.2 5.13 889.1 1179.4 4.86 886.3 1180.6 4.63 883.6 1181.7 4.41 881 1182.8 4.20 878.5 1183.9 4.02 876 1184.9 3.83 871.4 1186.8 3.57 867.1 1188.6 3.33 863 1190.3 3.1 859.1 1191.9 2.92 855.4 1193.4 2.75 15 Method of installing the MeAlear Air Line System of Vacuum Heating where water of condensation is returned to the boiler direct. 16 H EAT I N O' ♦ MC SLE^RU .SPECIALTl E5 Why the McAlear System is Superior to All Others In stating that the McAlear System is superior to all others^ we are making a j)rcttv strong claim—hut we are ready to })rove to the satisfaction of any building owner, heating engineer, heating contractor or architect onr claim not only in theory but in actual service. First of all the simplicity of construction, installation and operation will appeal to yon. We use the term “S_vstem” to designate the combined aj^plication of the INIcAlear Automatic Vacnnm Pump, together with all the connections that go with it. also the McAlear Tliermo Vent Automatic Air Valves, which com})rise a comi)lete method and system of steam circnlation. M'ith the McAlear System vacuum can be maintained on the pump and air lines including the radiators and boiler, if operated at low pre.ssure. This is accom])lished by means of the McAlear Automatic Vacuum Pump, which when properly placed and connected, REQUIRES NO ATTENTION ON THE PART OF ANY ONE to keep it in successful operation—a distinct and exclusive McAlear advantage. While the McAlear System lias many other advantages, on this one point alone we base our claim and can prove by actual operation that it is SUPERIOR TO AIT. OTHERS— because all other systems produce and maintain a vacuum at one point only by means of comjilicated and sometimes expensive pumps and apjiaratus which required skilled attention. Any practical heating engineer, by a careful study of the ^McAlear in¬ stallation, will find that a perfect circulation, control and distribution of steam can be obtained in a MUCH GREATER DEGREE than is possible with any other system. For this one reason alone many heating Engineers and Architeets wlio have made a careful study of the heating problem do not hesitate to give the IMcAlear System their endorsement and preference. Perfect Heat Without Noise, Leakage, Damage or Waste The McAlear System is jireferred for office buildings, hotels, schools, ])ublic buildings of various types, and hospitals where absolute quietness is necessary. There is no clicking, rattling, ])ounding, distracting noises in the radiators—there is no sizzling and leaky valves—no escaping of foul air from the radiators—no escaping steam or w'ater to destroy rugs, carpets, furnishings or decorations. Iiij considering the McAlear System your particular attention is called to the fact that it wmrks perfectlj^ either with or without temperature regula¬ tion, or on a one or two pipe system, making it adaptable and suitable for all classes of buildings and plant.s—especially apartment buildings and resi¬ dences, where warm rooms and halls are necessary to satisfy the tenants. Due to the extreme sinqdicity of construction, the McAlear System is elastie in ap])lication. Tlie proportioning of pumps for a large range of radiation surface is merely a question of using different sizes of ])umps of suitable capaeity for the services required. 17 VACUUM 5 ^LEMR*-SPECIALTIES Capacities and Prices of the McAlear Vacuum Pumps Number of rumii Maximum (buiaeity ill .Sij. Ft. 0 . of Pump Weigiit Height tviatii Steam Water Vapor Discharge Air Line I 280 5'3" 2'0" ly^ 4 14 2" 1" 2 320 5'5" 9 '- 2 " iy4 4 14 2" 1" 3 350 5'9" 0 ^- 2 " lyp 4 14 2" 1" 4 420 5'9" 2'0" D4 4 14 2" 1" ,5 400 O'l" 2'0" 1*4 4 14 3" 1" 0 520 2'0" 14 4 14 3" 1" 7 550 0'8" 2'0" 14 4 14 2" 1" 8 000 0'3" 3'0" 14 4 14 2" 1" 9 040 0'7" 3'0" 14 4 14 O" 1" 10 070 O'll" 3'0" 14 4 14 3" 1" 11 090 8'2" 3'0" 14 4 14 2" 1" 12 770 7'8" 3'0" 14 4 14 3" 1" 21 VACUUM 6- ♦MIZ^\L£RR]^ vapor heat McAlear Electric Air Line Vacuum Pump Protected by Patents Exclusive Advantages An important part of our system is the McAlear Electric Air Line Vacu¬ um Pump of an entirely new and improved type of rotary design—with a single propeller which rotates on ball bearings displacing the air with a roll¬ ing motion^ eliminating all friction and rubbing surfaces. When in opera¬ tion neither air or water is required to seal these pumps—there are no valves, gears, pistons, or sliding contacts requiring take-up or adjustment. These improved pumps will take care of aiw water that may be carried back in the air lines—without injury to any of their parts and without impairing their economy and efficiency in any way. The pump motor and idler come mounted on a heavy cast iron base in the form of one simple and compact unit—the belt is endless, oak tanned and impervious to steam, water or acids. Pump can be operated by either direct or alternating current motors. We guarantee the satisfactory working of these pumps—each pump is thoroughly tested before leaving our factory—all bearings are carefully lubricated, ready for operation. No other electric pump is so well adapted for use in connection with air line vacuum heating systems for residence, apartment buildings, hotels, office buildings, schools and other 23ublic buildings, including large stores and industrial plants. The pumps are silent in operation. They are provided with an auto¬ matic vacuum controller, so arranged that when the vacuum drops to five inches on the air line, the motor automatically starts the pump and imme¬ diately runs the vacuum up to ten inches, at which point the current is automatically cut off and the pump is shut down. The big advantage of this system of control is that you are only using current for short periods. This makes the equipment unusually economical and efficient in operation, because you are not wearing out your equipment by continuous operation—an ad¬ vantage in economy well worth your serious consideration. 22 H EAT I N Gh ♦7V\C 3PEC1ALTI E5 1. Impeller. 3. Ball bearings. 5. Inlet. 2. Crank shaft. 4. Hinged Wall. 6. Discharge. Capacities and Prices of the McAlear Electric Air Line Vacuum Pumps No. of Pump Max. Cap. Sq. Ft. Direct Radiation Horse Power of Motor Actual Dls- plac’t cu. ft. Per Minute Space Req’d for Pump Inches List Price Approx. Shipping Weight 10 4000 12 X 22 $353.14 300 11 6000 ^4 6 12 X 22 411.90 350 12 10000 Vz 10 12 X 24 555.06 450 13 20000 Vz 20 14x30 891.00 550 14 28000 % 35 14x30 990.00 700 15 35000 14x36 1,126.40 800 In ordering pumps be sure to state whether the current is direct or alternating, giving the voltage, cycle, and phase. We will guarantee the satisfactory operation of our pumps only when used in connection with the radiation set opposite each size in the above table. In ordering pumps, please state the amount of radiation in square feet of direct radiation and square feet of blast coil or vento radiation, if there be any. The above capacities are based on square feet of direct radiation only. In order to determine the size pumps for blast coil work, multiply the square feet of blast coil or vento radiation by two and select a pump suitable for the work. The above prices include pump and motor complete with sub-base, ex¬ pansion tank, gauge glass, vacuum gauge, automatic electric switch, vacuum controller and check valve in air connection between the expansion tank and pump. All of the materials delivered f. o. b. cars, Chicago. 23 For Old or New Heating Plants For a description of the air piping system see specifications, on Pages 33 to 35 inclusive. The McAlear Electric Vacuum Pumps can be installed in connection with old or new heating plants, having what is known as a one or two pipe system. When installed in connection with plants already in operation, the air piping is usually run to correspond to the steam piping and the con¬ nections to the radiators are made to an automatic air valve that is usually placed about midway the radiator. When installing the air piping system, care should be taken to ream out the pipes and see that all joints are made properly and that they are put together with asphaltum so as to make them absolutely air tight. When the air piping is installed, a test should be made as hereinafter outlined in the air piping specifications, pages 33 to 35 inclusive. If the air piping is properly installed and will stand the test prescribed, the pump will be able to produce 10 inches of vacuum in 10 or 15 minutes from the time the service switch automatically starts the motor and pump. This vacuum will be sufficient to exhaust the air from the radiators and dis¬ charge it to the atmosphere. When the air is all exhausted and the vacuum reaches 10 inches, the automatic electric vacuum controller cuts off the current and shuts the pump down. The pump will remain shut down until the vacuum on the air line drops to five inches, at which point the automatic vacuum controller throws the controlling switch and starts the pump and again brings the vacuum up to 10 inches at which point the current is again cut off and the pump closes down. In operating the pump automatically in this manner it reduces the cost of operation to a minimum, and increases the life of the pump and motor. The actual cost of operating the pump amounts to only a few cents per day for the electric current used. 24 HEATl N G- «7 V\5;/S ;LE7|R*-3PE:CIALT1E5 Fourteen Distinct McAlear Advantages 1st—A positive and uniform circulation of steam throughout the entire heating system AT or liELOW atmospherie pressure. 2nd— Greatest economy by utilizing heat of steam at low temperatures. .‘3rd—Noiseless and safe—will not foul the air in the room, no leakage or dripping from air vah^es— no possibility of damage to furnishings—guar¬ anteed to he a SEALED SYSTEM. 1th—The independent and positive removal of the air and water of eondensation from the heating ap¬ paratus. 5th—Continuous satisfactory service always at an ex¬ ceptionally low maintenance and repair cost. 6th—Saves money because no power is required to operate the modern McAlear Steam Operated \"acuum Pump—simply make connections and the pum]i does the rest. 7th—Absolutely automatic—no starting or stopping the pump—no valves to open or close—no skilled labor required. 8th—So simply constructed and works with such me¬ chanical ])recision that there is nothing to get out of order—requires no oiling, attention or ])ay roll. 9th—Fuel saver because it heats up in I.ESS THAN HALF TtlE TOIE required by other systems and never “overlooks” a radiator on the line no matter where located. 10th—Saves labor and coal because of the long intervals between firing. 11th—Superior to other “vapor” or “vacuum” systems because it maintains heat during the night bet¬ ter and longer. 12th—Less exjjense because less steam used, less coal burned to heat a given space—the McAlear Sys¬ tem ])roduces heat at the minimum cost. 1.3th—No royalties charged for the use of the IMcAlear System. 1 ith—Iron Clad Guarantee to replace FREE OF CHARGE any defective parts of any materials furnished by us—see l)age 3. 25 VAC uuM jy *♦ vapor heat McAlear Thermo Vent Automatic Air Valve No Adjusting — “Fool-proof” The ^4 X yg inch Thermo Vent Automatie Air Valves are used in conneetion with the MeAlear System of Vaeuum Heating or any other air line vacuum or drip pipe work. Beeause of their design and construetion, no adjustment is neeessary either at the factory or on the job. This is an important advantage because it insures perfect operation of the system and hot radiators at all times. Contractors and Engineers will appreciate this advantage as it eliminates the trouble and expense so often experienced in having to adjust and put in order the so called “automatic” air valves formerly used for this purpose. The McAlear Thermo Vent Automatic Air Valves are “fool” proof— they cannot be tampered with or put out of order. Each valve is provided with a movable hex nipple No. 1 so that if one should happen to break when connecting the valve to the air lines and radiators, all the expense incurred to make the valve as good as new would be a few cents for another nipple. The McAlear is superior to all other valves in this respect. If this nipple should break on any other make of valve, the valve would have to be thrown into the scrap heap at a total loss to the purchaser because it could not be repaired. In addition, the McAlear has another decided improvement over all other makes of valves. A hex tail piece No. 6 is used, which enables the steam fitter to screw it on to a pipe with a monkey wrench, thus preserving the nickel plating with no possibility of marring the appearance of the valve. (h'or prices see page 29) 26 HEATING- ♦7 V\C/ ^LEAR*’^PE:CIALT1E5 McAlear Thermo Vent Automatic Air Valve Actual Size No. 22 This list of repair parts is suitable for all valves from No. 22 to 36 inelusive, except part No. 1 which is only fur¬ nished with No. 22 valve. IJST OF PARTS 1. —Hex Nipple 2. —Valve Body 3. —Disc Plate i.—Expansion Disc 5 . —Cap 6. —Hex Tail Piece 7. —Union Nut 27 \^cuuM 6" heat McAlear Thermo Vent Automatic Air Valve Inlet These Valves have a full §" opening. Actual Size No. 24 This valve is similar in construction to No. 26, except that the part that connects with the radiator or coil is tapped for pip® place of with union as is the case with the No. 26. The union, however, in the No. 2i is placed on the discharge side of the valve and the tail piece will be furnished with either male or female thread. These valves are used for the same or similar purposes as figure No. 26. They are especially suitable, however, for use in connection with Blast Coils, Vento Radiation and relieving mains of air pockets, etc. In fact, any service where a large volume of air is to be removed in the shortest possible time. The valves are non-adjustable and embody the same principles of con¬ struction as tliose so successfully used in our Thermo Vent Automatic Air \'’alvc. No. 22. In ordering, state steam pressures and whether for use in connection with vacuum or pressure systems. For prices, see Page 29. 28 HEATING' McAlear Thermo Vent Automatic Air Valve Inlet These valves have a full §" opening Actual Size No. 24 The McAlear Tliermo Vent Automatic Air Valves are recommended for use in connection with Fan Coils, Vento Radiation and the McAlear System of vacuum heating, as they are necessary to insure its perfect and suc¬ cessful operation. We do not hesitate to unqualifiedly guarantee these valves to be perfect in design, workmanship and material, and to be absolutely automatic and non-adjustable, also to ]iass air in large (piantitics and to close absolutely tight against steam, whether used in connection with gravity or vacuum heating systems. It is understood that when these valves are used in con¬ nection with gravity or vacuum heating systems they are to be provided with drij) pipes. In ordering, state service and pressures. No. 22, Size ^2.50 each No. 24., Size jixyi" . 5-00 each No. 26, Size yxYz" . 6.00 each Liberal discounts from above prices will be given to the trade. 29 VACUUM x)/^-inch Thermo Vent Automatic Air Valve and connect same as above specified. These valves are non-adjustable, therefore, it will not be necessary for the contractor to figure on adjusting them after the job is jmt in operation. 33 VACUUM ♦M fZ S'lEKlii* VAPOR heat Valves All valves used in connection with the air piping system and other connections around pump, must be of the straight-way pattern and thor¬ oughly packed with a good quality of moulded packing, so that they will he absolutely tight when in service, valves to be equal to those manufac¬ tured by the Chapman Valve Company or Crane’s best. Fittings All fittings used in connection with the Vacuum System, shall be best quality of gray cast iron, heavy pattern with clean cut threads. Pipes All piping used in connection with the Vacuum System shall be of a good quality of wrought galvanized iron. All piping to be carefully reamed out and must have clean cut threads; joints to be put together with asphaltum (the asphaltum to be placed on the pipe threads and not in the fittings) and when complete, must stand a pressure test of forty pounds per square inch, throughout the entire system. Test to be made with air or water in the presence of a representative of the Architect or the Vacuum Company, as hereinafter specified. Test In making test, cap all connections to air valves and make sure that all cut off valves throughout the entire system of air piping are wide open, then turn into the system, either air or water under a pressure of forty pounds to the square inch. Where directed, place pressure gauges at the ends of the long runs for the purpose of determining the pressure at these points. If leaks are found, they must be properly marked and repaired and after repairing, if in the judgment of the engineer or representative of the Vacuum Company, a second test is necessary, the contractor must make same and demonstrate to the satisfaction of all parties concerned, that the system of piping is absolutely tight and will hold the pressure hereinbe¬ fore referred to indefinitely without any perceptible drop. Vacuum Pump Furnish and place where shown or directed, one McAlear Automatic Vacuum Pump of suitable capacity for handling-square feet of direct radiation and-lineal feet of fan coils. Make all the necessary steam, water and air connections to pump as directed and as required by the manu¬ facturers, placing in all connections, the necessary cut off and check valves. Connections to Vacuum Pump Steam connections to pump must be taken direct from tbe boiler header through a Kieley 98 pressure reducing valve if the steam pressure exceeds 10 pounds. If less than 10 pounds a reducing valve will not be required. If a reducing pressure valve is used place it in the steam con¬ nection at or near the boiler and arranged with by-pass and cut off valves, so that the valve can be removed for repairs. The steam supply pipe from the pressure reducing valve to pump to be one size larger than that called for by the pump, and at a point near the 34 HEATING- *7V\C7TL£J:^R « specialties pump reduced to the proi)cr size and provided with cut off valve and steam gauge of tlie size hereinafter s])ecified. Water connections to pump to be taken from City water supply and run one size larger than that called for to pump. If the City water pressure exceeds fifty pounds, place in the connection at or near the jnimp, a Kieley water pressure redueing valve and regulate same to main¬ tain a pressure not to exceed fifty pounds on pump connection. Place in the w^ater connection at or near the pump, cut off valve and pressure gauge. Air connection to pump to be made in the manner indicated on blue print accompanying pump. The directions and instructions given on blue print must be followed carefully and all connections must be made in accordance therewith. Place in air connections at or near the pum]), cut off valve and vacuum gauge. Discharge from pump to be connected with sewer or catch basin of the size called for, making sure that there is no back pressure from the sewer and that the discharge is free and open to the atmospliere. Tliere must not be any trap or seal in the sewer connection beyond where tlie discharge from pump is connected. Steam Pressure Reducing Valve Furnish and install where directed, one 2^" Kieley 98, special re¬ ducing valve. This valve to be arranged with by-pass as hereinbefore specified, and regulated so as to maintain one pound steam pressure on pump. This valve is only necessary where the steam pressure exceeds 10 pounds. Water Pressure Reducing Valve Furnish and place in water supply to pump, when City pressure ex¬ ceeds fifty pounds one \" Kieley water reducing valve and regulate same to maintain a pressure not to exceed fifty pounds on the pumj) supply. Gauges Furnisli with vacuum system one Vaeuum gauge, and one 3^" Steam pressure gauge, all gauges to be furnished by the manufacturers of the Vacuum System, but must be installed in place by the contractor as hereinbefore specified. Instructions Engineer’s bulletin and drawings showing how the pump and Vacuum S 3 '^stem is installed and operates, must accompany the pump and the instructions given therein, must be followed carefully by the contractor installing the work. The instructions to he given the engineer after the plant is completed and in operation and the instructions thereon must be carefull}' followed bv the operating engineer. Painting Paint all vacuum piping, connections, fittings, etc., witli two coats of asphaltum. Painting to be done when the plant is in operation and a vacuum is on the system. 35 VACUUM &' ♦M f MlERil* vapor heat Sparks Automatic Vacuum Pump (Patented and Patents Pending) Automatic Vacuum Pump Company now changed to The McAlear Manufac¬ turing Company. 'Die personnel of our Coin- ))any has not been ehanged in any way—but we have made several ebanges and decided im- ])rovements in our line of pinups and vaeuinn beating spe¬ cialties, hereafter to be known as the “McAlear System” and s])ecialties. ^^'e will manufacture and can furnish promptly to any one desiring same, S ]) a r k s Pum])s of the type illustrated above, also repairs and renewals for all of the different style Sparks Pumps now in use. The im])roved McAlear line of Pumps are so much better than the Sparks (heretofore manufactured by the Automatic \bicuum Pump Co.) that we do not hesitate to urge all owners of Sparks Pumps to convert them into McAlear Pumps, which can be easily done by removing the Sparks Pump Head and installing in its place the McAlear Pump Head. To make this change we will furnish drawings showing bow to do the work, together with a price covering the cost of the necessary material. In the McAlear type of pump there are no adjustments or levers of any kind to get out of order or that will require attention—the possibility of trouble has been entirely eliminated. 36 HEATING' ♦ I V, ♦ SPECIALTIES 37 38 Application of the McAlear two pipe system of vacuum heating returning the water of condensation direct to the boiler and discharging the air to the atmosphere by means of the McAlear return trap and vacuum pump. H EAT I N G- ALEAR* .SPECIALTl E5 McAlear Two Pipe Vacuum System of Heating The illustriition on page 38 shows a typical installation of a McAlear Two Pipe Vacuum System of Heatings returning the water condensation direct to the boiler by means of the improved McAlear Air Exhauster and Return Trap, discharging the air taken from the system by means of the McAlear Pump into the smoke breeching. With this equipment the MeAlear Pump pulls a vaeuum on the return tra})—the return mains thereby pulling the water of condensation and air from the entire system back to the trap, separating the air from the water in the trap—discharging the air to the atmosphere and the water into the boiler. When the trap fills with water, the float automatically opens the valve in the steam equalizing pipe—this equalizes the pressure on the trap and at the same time closes the vacuum connection to the trap, thereby allowing the water to be discharged into the boiler. After the water is discharged, the trap automatically closes the valve in the equalizing pipe and opens the valve in the vacuum connection, again allowing the vacuum produced by the McAlear pump to pull the air and water from the heating system back into tlie trap. Each action being simple, positive and quick. Tlie big advantage of this entire equipment is that it is absolutely automatic, positive and dependable in operation. If connected in the man¬ ner indicated, it will enable you to operate any return line vacuum system of heating, low pressure gravity or otherwise, with the same degree of efficiency and economy as though high pressure steam driven pumps were employed to produce the vacuum and return the water of condensation to tlie boiler—but at a much loxver operating and maintenance expense. This improved system can be operated equally satisfactorilv with a maximum steam jiressure of half a pound or any pressure above lialf a pound. It is not necessary that the boiler pressure be the same as the pres¬ sure on the heating system. The boilers can be run high pressure and a reducing valve installed in the heating main to reduce the steam for heating jmrposes to any low pressure desired. The improved McAlear Pump is extremely flexible—it can be operated on a lialf pound steam pressure—the McAlear Air Exhauster and Return Trap will operate on any pressure from half a pound to 100 pounds or higher, if desired. The problem of successfully eliminating air and returning water of con¬ densation from heating systems to boilers has been a troublesome one and one which commands considerable attention of the engineering profession and others who have had experience with heating systems. There has been a great many different kinds of appliances used in attempting to accomplish the desired result, but it remained for the JMcAlear System to successfully solve the problem—we are confident that no other system is so reliable and ])ositive in operation. Tliis you can prove to yourself by a study of our different systems and appliances—indisputable evidence that we are able to successfully handle air and w'atcr in any quantity from heating systems in a very positive, reliable, efficient and economical manner. 39 MOOULAT1N<3 rv!ODUU/®sTlN 3PECIALT1E5 The Kieley Air Trap Outlet Inlet No. 60 SERVICE—The Air Trap above illustrated is suitable for services in connection with steam or hot water heating systems for relieving the mains and radiators of air automatically. The seats and discs are constructed of a good quality of bronze and when in service will close absolutely tight against the water pressure and open automatically to relieve the system of air, but under no circumstances will the trap discharge water. These traps are usually placed at high points in the system or where air is liable to accumulate. This trap can also be used in connection with water works systems to relieve the mains at different points of air. If you will note we build these air traps in seven different sizes, which makes it possible for us to take care of any amount of air that may accumulate in cold water mains or hot water heating systems. Prices, Dimensions, Weights and Capacities High and Low Pressure Number of Trap .i 0 1 1 2 3 4 1 6 1 6 7 A . .1 1/2 % 1 1 11/4 iy2 1 2 1 2y2 3 B . .1 8% 9% 10% 12 141/8 1 151/8 1 17 ys 18 y2 C . .1 21/8 2% 1 2% 3% 4% 1 4% 1 4% 6y8 D . .1 121/4 14 Va 1 161/8 IS 181/8 1 201/2 1 24 25 ^ B . .1 31/2 3% 4 3% 3% 1 4y8 1 41/8 4yo F . 5y2 1 6% 71/2 8 1 10% 1 101/4 10% Capacity, sq. ft, radiationi 900 1,300 1 2,000 3,300 5,000 1 8,300 111,500 16.500 Weight . .1 30 40 1 50 55 65 1 105 1 130 145 Price . .1 121 $25 1 $35 $45 $60 1 $80 1 $100 $125 ORDERING—In ordering air traps it is very important that the following information be given on all orders: First: Range of pressure on water mains. Second: Does water pressure vary, and if so, to what extent? Third: State if for use in connection with steam or hot water heating systems or cold water supply mains. Fourth: State approximately, if possible, the amount of air in cubic feet per minute the trap must discharge. Fifth: State if for use in connection with high or low pressure service. Sixth: State if water gauge glass equipment is wanted. Water gauges are extra and are only furnished when so ordered. For application see page 64. 63 VACUUM / J w”- « I - I 'i - T ^ ' 'jp .* :arl x.;5t ‘ / },; -AZi ur^,, 1 f t-j r—' *" *' rj % j r'' ■ ^ f' f-o 3 -,U ■* “ ^ ^ -ujp J ^ 1 - M 7 r '?r^ ’ «'' ' I t* 'jJ t*; 4 ^ ^ 4 ;s ho - S j-i - I J ^ ^ 1 h J 1 J i" i ^ }»' -. 1 X^-V)- ^ X 1, r' - I,- ,* i ^ ,J -• , « •i'y)))-“ » V ir'- , j jf L 3 " « » , 3fe X , r \ . - { ^- . J » ^ I >“ _x >-3 '' ^ I X S ;1 ‘M ■- r- “ { a ^.j| -r j :ra:tcr H" >• I i ^-“'5 r’-v- j^iV,;-'- ^- ' - H'> uiKirsKSsi-r^™ '1 ^ '■T J 7)1 j X. 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