Document 4JYYj3M9kp9Ozpq9Z5b4JMkQQ

C. A. Dunham Company Heating Systems specialties DUNHAM HEATING SPECIALTIES Traps Low Pressure Thermostatic Traps For all types of low pressure steam heating systems up to 15 lb gage. Dun ham design assures freedom from clog ging; thorough draining of radiators by gravity; minimum wear on parts. Body and cover of cast bronze; disc of Monel metal. Round, slightly raised valve seat minimizes depositing of incrustations. High Pressure Thermostatic Traps (TH series) For 5 to 100 lb working pressure Traps operate in response to pressure caused by partial vaporization of liquid within thermostatic disc. Trap is non-adjustable; permanent adjustment for cor rect operation built into thermostatic disc. Body, cover, union nut and nipple are brass. Special welded Monel metal disc is designed to reduce movement at rim and distribute disc motion uni formly. Valve and seat are special heat treated stainless steel. Spherical valve is swiveled to insure tight seating without causing localized stresses on disc. Ex ceptionally large valve opening permits ready passage of water or. dirt, unob structed by guide. Standard 15 Lb to 15 in. Vacuum Pattern Tapping Cap. Sq Ft EDR Size No. 1C 2E 3C AP SW RH LH VS AP SW AP H' 1' 200 400 700 * Ratings are based on K lb condensation per sq ft of EDR per hour and a 1H lb pres sure differential. Cross section. Type THl-A Thermostatic Steam Trap CAPACITY POUNDS CONDENSATE PER HOUR SIZE Tap ping Working Pressure Lbs per Sq In. Gage 5 25 .50 100 Net Wgt Lbs THlA H' TH2A %' TH3A r 125 355 560 840 2 195 565 880 1300 2X 290 790 1200 1780 3 Float and Thermostatic Traps Operating Pressures up to 15 psi gage. Especially adaptable for service as a drip-trap for dripping ends of steam mains, unit heaters and all types of neat ex changers. Capable of handling large amounts of air and wuter. 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. Sizes: f in., 1 in., H in., li in-> and 2 in.; respective capacities: 800, 2000, 4800, 9600 and 20,000 EDR at \ lb condensate per sq ft per hr with 2 lb pressure differential. Series 31 closed float traps available in same capacities. Series SO Float and Thermostatic Traps and OBS Inverted . Inverted Bucket Traps Traps Type OBS--for operating pressures up to 150 lb. Sizes: | and f in. Type OB--for operating pressures up to 150 lb. Sizes: to 1J in. inclusive. For venting air and draining water from high pressure steam lines, heat exchangers, sterilizers and processing equipment. These traps increase heat transmission ef ficiency and hold equipment capacity to a maximum. Body and cover of high tensile iron castings. Valve and seat (renewable and interchangeable) are special hardened, corrosion-resistant steel. Sheet copperbucket. 1352 C. A: Dunham Company Heating Systems Specialties DUNHAM HEATING SPECIALTIES Valves "Oriflex" Valves Self-contained, adjustable orifice valves, packless bellows-type for proportioning steam supply to each radia tor. Unique "handle movement" eliminates graduated opening or closing. Valve need not be disconnected to make adjustments. Merely remove handle, insert key on adjustment stem and turn to set orifice at desired setting. Sizes: & and | in. "Orifiex" Valves, Type 175 Spring Packed Valves Designed for low pressure steam Heating services. Body is brass casting, rough finish. Heavily constructed brass union nuts and nipples. Non-rising stem. Valve opens fully on less than one turn--dial shows direction and amount of opening. Heavy spring keeps constant pres sure on special graphite asbestos composition packing to maintain tight seal around valve stem. Sizes: 1 to 2 in. inclusive. - - -- Packless Valves For all types of low pressure steam heating systems. Body and bonnet are brass casting, rough finish. Heavily constructed brass union nuts and nipples. Tinned phos phor-bronze bellows sealing member gives maximum resilience and wear; prevents leakage; keeps steam, wa ter and dirt from clogging and corroding spindle nut and screw. Non-rising stem. Heat resistant composition handle. Sizes: | to 1 in. inclusive. Packed type radiator valves also available for steam and hot water systems. Vacuum Pump, Type VR Dunham Pumps Vacuum Pumps These pumps efficiently maintain desired vacuum range on return lines and deliver water of condensa tion direct to low pressure boiler. Each pump has own control panel wired through to motor. Selector switch on panel permits pump to operate on fully automatic, continuous, or float control. Type VR Pumps are furnished as single or duplex units with separate accumulator tank to handle low returns. Type VRD Pumps are Duplex units complete with integral accumulator tank on a single bed-plate. VRDA Duplex pumps with separate accumulator tank are also available. Made in nine sizes from 2500 to 65,000 EDR. Pumps built for 20 lb discharge pressure; also for 30, 40, 50 or higher pressures according to requirements. Condensation Pumps A complete, compact assembly that automatically re turns water of condensation to boilers from gravity sys tems or steam process equipment. Pump and motor as sembled on rigid cast iron base. Bronze-fitted centrifugal pump has non-corrosive shaft, enclosed type impeller, liberal size ball bearings. Type CH--Model C, Single and Duplex--capacities 2000 to 50,000 sq ft EDR; 60 cycle a-c or d-c, 1750 rpm 25 or 50 cycle a-c, 1450 rpm. Type CHH--Model C, Single and Duplex--capacities same as Type CH. Discharge pressure 20 lb for pumps 15,000 sq ft EDR and larger; 30,40, 50 and 70 lb discharge in all sizes. 60 cycle a-c or d-c, 3450 rpm. 25 or 50 cycle a-c, 2850 rpm. Duplex Unit, Type CH (CHH) 1353