Document nmgEmoGpBLRRkJykBvjqM2Dwa

C. A. Dunham Company i- Heating Systems !?ut DUNHAM UNIT HEATERS Horizontal Discharge Type Type V. Supplies proper volume of air at reasonably low out let temperatures. Available-in two models--H and HM. HM model, having less fin surface and lower final tempera tures, is for higher steam pressures. Sturdy steel case as sures maximum rigidity and freedom from vibration. Fur nished with constant-speed, two-speed or multi-speed motors. Manufactured in 11 sizes. Capacities at 2 lb steam, 60 deg entering air: 15,600 to 360,000 Btu per hr. Type V Heater Type C Heater Vertical Discharge Type Type C. Discharges air stream verti cally downward. Outlet temperatures relatively low. Volume of air kept high to promote uniform heat distribution horizontally, as well as to equalize tem perature differences between floor and ceiling. Four types of diffusers avail able. Heating element of non-ferrous mate rials. Fins are copper or aluminum. Tubes are heavy copper--expanded into fins to provide a positive permanent mechanical bond--then silver soldered into cast bronze or copper headers. Manufactured in 7 sizes. Capacities at 2 1b steam, 60 deg entering air: 32,800 to 492,000 Btu per hr. Wall type heater Blower Unit Heaters Type R. Available with mixing damp ers, by-pass dampers and filter sections for heating and ventilating large areas, or for heating only. Belt-driven centrifugal type blower fans use constant speed 1750 rpm motors on 60 cycle or DC current. Fans are double width, double-inlet type with forward pitched blades. Self-aligning, dustproof ball bearings support fan shaft. Heating element is replaceable tube type. Brass clamping nuts securely fasten seamless drawn copper tubes into semi-steel cast headers. All essential parts readily accessible, and can be re moved through either end of heater casing. Working pressure: up to 150 psi steam. Capacities at 2 lb steam, 60 deg enter ing air: 105,000 to 822,500 Btu per hr. Floor type heater with mixing damper. Also available with elongated nozzles. 1416 Ceiling type, heater C. A. Dunham Company Heating Systems fg**1- DUNHAM HEATING SPECIALTIES Radiator Traps For all types of low pressure steam heat ing systems up to 25 lbs gage. Dunham design assures freedom from clogging; thorough draining of radiators by grav ity; minimum wear on parts. Body and cover of cast bronze; disc of Monel metal. Round, slightly raised valve seat minimizes depositing of incrustrants. Size 1E 2E 3C Pattern AP SW RH LH VST AP SW AP Tapping w U' 1* Cap. Sq Ft EDR 200 400 700 Thermostatic Steam Traps Operate in response to pressure caused by partial vaporization of liquid within thermostatic disc. Permanent adjust ment for correct operation built into trap at factory. Body, cover, union nut and nipple are brass. Valve and seat are special heat-treated stainless steel. Spherical valve is swiv eled to insure tight seating without causing localized stresses on disc. Ex ceptionally large valve opening permits ready passage of water or dirt. For 6 to 100 pounds working pressure-- Made in in., i in. and 1 in. sizes, for capacities from 125 to 1780 lb Cond./hr. * Ratings are based on ^ lb condensation per sq ft of EDR per hour and a lb pressure differential.- Thermostatic Steam Trap Type TH-IA Float and Thermostatic Traps Especially adaptable for service as a drip-trap for dripping ends of steam mains, unit heaters and all types of heat exchangers. Capable of handling large amounts of air and water. Float is made of copper. Float valve and seat are Monel metal. Body can be removed for inspection of working parts without disturbing piping connections. Operat ing pressures up to 15 psi gage. Sizes: 24 in., 1 in., 1J4 in., 1J4 in., and 2 in.; respective capacities: 800, 2000, 4800, 9600 to 20,000 EDR at ]/\ lb condensate per sq ft per hr with 2 lb pressure differ- Float and Thermostatic tial. Series.31 closed float traps avail- Trap, Series so able in same capacities. Inverted Bucket Traps For venting air arid draining water from high pressure steam lines, heat exchangers, sterilizers and processing equipment. Traps increase heat transmission efficiency and hold equip ment capacity to a maximum. Body and cover of high tensile iron castings. Valve and seat (renewable and interchangeable) are special hardened, corro sion-resistant steel. Sheet copper bucket. Capacities range from 400 lbs to 5600 lbs of condensate per hour. Operating Pressures: 20 to 150 lbs gage. Sizes: Type OBS )4 and 24 in. Type OB 24 to 1)4 in. inclusive. 1417