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Warren Webster & Company Heating Systems . STEAM HEATING AND PROCESS SPECIALTIES Radiator Valves--Choice of spring re tained packing, Type BW-P or Sylphon Bellows Packless Series 600-S. in., 24 in-, 1 in., 124 in- sizes. In angle, right and left hand; straightway, with single or double union. Spring retained pack ing. For low pressure vapor and vacuum steam heating service. Ask for Bulletin B-705. Thermostatic Traps--Series "7" (dia phragm type) and Series "5" (bellows type) for radiators and drips. 24 in., 24 in. and 1 in. sizes. There are six body models for the 24 in. size.alone. Maximum pressure, 25 lbs per sq in. For low pressure vapor and vacuum steam heating service. Series ``78" for process. 24 in., 24 in., 24 in. and 1 in. sizes. Class 2 for pressures of 60 to 150 lbs. Used to discharge air and water from heating coils of any apparatus using steam at process pressures. Ask for Bulletins. Heavy Duty or Drip Traps--Series "26" Float-and-Thermostatic for heat ing and air conditioning. Most used sizes: 00026, 0026, 026. Pressures up to 15 lbs per sq in. Made for the pressure and capacity conditions encountered at all drip points. Series "79" Float-andThermostatic for process. For pressures up to 150 lbs per sq in. For use where large volumes of hot condensate must be handled more quickly than is possible by thermostatic traps alone. Ask for Bulle tins. Dirt Strainers--Dirt: 24 in. to 6 in. sizes. Maximum working pressure 150 lbs per sq in. Placed ahead of traps in return lines of steam-using equipment and steam heating systems to eaten dirt and other particles, preventing them from impairing the tightness of the traps. Suction: Maximum working pres sures 15 lbs per sq in. Installed ahead of vacuum pump to prevent dirt from damaging pump. Ask for Bulletin B-709. Boiler Protectors--One size, with 24 in. connections with or without electrical cut-out switch. Maximum pressure 15 lbs per sq in. Maximum cold water main fjressure, 150 lbs persq in., minimum not ess than 25 lbs per sq in. Prevents breakage in low pressure heating boilers when the water level becomes inade quate. Ask for Bulletin B-727. Expansion Joints--Crosshead or in ternally guided. In single slip and double slip models in most widely used pipe sizes. For pressures up to 200 lbs. er sq in. For steam, hot water, hot oil, ot gas, and condensate return lines. Also Double Service Valves, Check Valves, Lift Fittings, Gauges, Motorized Valves, Steam and Oil Separators, Sight Glasses, Vacuum Breakers. Ask for Bulletins. RADIATION AND HEATING SURFACE Webster System Convector Radiation-- Non-ferrous convector radiation. Each Webster System Radiator includes a com- lete enclosure of furniture steel with aked prime coat. Choice of five types of enclosure, two fully recessed, plaster front and metal front. Three cabinet models. Contained within the enclosure is aprefabricated unit, combining heating surface, valve, trap and union connec tions, shipped ready to connect to supply and return piping. Webster System Radiation was first offered in 1932. Now, available in an improved design, using the same basic material, copper tubing and aluminum fins. Increased rigidity of the tubing and the development of a new method of manufacturing has produced a fin surface of unusual rigidity, free of expansion and contraction noises. Ask for Bulle tin B-1500. Webster Type WI Extended Surface Radiation--Covered by patents and pat ents pending. Completely non-ferrous, being made up of specially annealed cop per tubing with rib-reinforced, square pressed aluminum fins. Available in two fin sizes. 3 in. fin size in 2, 3, 4, 5, and 6 ft; 4 in. fin size in 2,4,6 and 8 ft lengths. Can be used to advantage in many build ings with steam or hot water 'heating, particularly where floor space or vertical wall space is limited. Ask for Bulletin B-1550. Webster Walvector--Elongated, nonferrous convector incorporating Webster Type "WI" heating element. Enclosure available in four types, for mounting along outside wall close to floor or under windows. Delivered as complete "pack age," it includes all components needed. Can be used as separate cpnvector unit or for wall to wall application.^ For steam or hot water heating. Radiation may be orificed for steam installations. Ideal for educational or institutional buildings and other commercial struc tures. Ask for Bulletin B 1551 1374 Warren Webster & Company Heating Systems Steam Unit Heaters WEBSTER-NESBITT UNIT HEATERS----------------------- Are manufactured by John J. Nesbitt, Inc., Philadelphia 36, Pa., and are distributed solely through Warren Webster & Company, Camden, New Jersey. Designed to circulate large volumes of air at comparatively low temperatures, assuring quick heating. H Ratings of Webster-Nesbitt Unit Heaters are based on tests made in accordance with standard test code of Industrial Unit Healer Association and A.S.H.V.E. PROPELLER FAN UNIT HEATERS Designed to in corporate four characteristics essential to both proper application and satisfactory performance: 1.) Selective range of sizes. Manufactured in nine sizes. Heating capaci Fig. 1. Standard Propdler-Fan Type. ties vary from 34,700 to 338,000 Btu per hour. Air deliveries from 470 to 4800 cfm. 2.) Quiet Operation. All fans have blades of exceptionally large areas and of a shape to impart a gradual accel eration to the air stream. Ample spacing is maintained between the fan and heat ing element. Motors are of sleeve bear ing type and equipped with isolators. 3.) Durable lightweight Heating Elements. Extended fin-and-tube type, constructed of copper condensing tubes and plate- type aluminum fins. 4.) Modem Casing Design. Compact suspended type. W-N 126: GIANT UNIT HEATERS Sturdy blower-fan units for the econom ical heating of large areas. Standard (NonThermadjust) type. Used principally where heating is by recirculation only, and where constant heat output is desired during period of operation. Fig. s. Blower-Fan Type Thermadj ust Type Employs dampers in front of casing and over face of heating element to provide mixing of unheated and heated air, pro ducing heat output in accordance with requirements and continuous circulation of air volume. Valve Controlled Type. Unit is of standard casing arrangement but equipped with Nesbitt Heating Surface and Steam-distributing Tubes which allows for automatic control of heat output. Floor mounted, wall mounted, ceiling suspended, from 101,000 Btu, 2580 cfm to 1,008,000 Btu, 17,800 cfm. Pub.W-N128. SERIES "R" UNIT HEATERS A,neat, furniture steel cabinet enclos ing a copper tube, aluminum fin heating element adaptable for steam or forced hot water systems; and two to five centrifugal fans belt-driven from an elec tric motor. Universal design offering wide flexibility. Especially adaptable where low noise levels are desirable. Variable-pitched motor sheave permits low or high speed operation of fans. Available in four sizes. Air deliveries with standard drive range from 518 to 1890 cfm. Steam heating capacities range from 158 to 588 EDR. Send for Catalog W-N 133. Fig. 2. Series "R" Unit Healer. LITTLE GIANT UNIT HEATERS Adaptable to a wide variety o f applications an< field conditions Seven basic sizes, each with a choice of two (some units three) heating ele- 4.Fig. Down-Blow Type. ments. The three smaller sizes are of the blow-through type, having lower out let velocities generally intended for the lower mounting heights of commercial installations. These sizes are made in down-blow type only. The four larger models are of the draw-through type, and produce the high discharge velocities necessary to blow long distances. These four models are available in either hori zontal or vertical down-blow arrange ments. Non-ferrous all-purpose heating ele ments designed for steam pressure up to 200 lb. gauge, saturated, and sturdy cas ings of modern design. Heating capaci ties range from 28,500 to 348,000 Btu basic steam ratings. Send for publica tion W-N 134. 1375