Document jBVGjkvMNne5rR68J9OrD8EXk

C. A. Dunham Co. Heating Systems v3"d No. 740 Radiator Valve No. 400 Radiator Valve RADIATOR TRAPS--For all types of low pressure steam heating systems. Body and cover of cast bronze, disc of Monel metal. Available in 6 patterns. Capacities'from 200 to 700 EDR. THERMOSTATIC TRAPS--Trap has cast brass body and cover; replaceable stainless steel valve and seat; disc of Monel metal. For 5 to 100 lb working pressures. Capacities from 125 to 4,500 lb of condensate per hour. FLOAT AND THERMOSTATIC TRAPS --Use as drip trap for steam mains, unit heaters, heat exchangers. Float, copper; float valve and seat, Monel metal. Up to 15 psi gage working pressure. Sizes: ^A and 2 in. with capacities from 100 to 5,750 lb of condensate per hour. Type* OB and OBS Bucket Traps INVERTED BUCKET TRAP--Body and cover of high tensile iron castings. Valve and seat (renewable and inter changeable) are specially hardened, cor rosion-resistant steel. Operating pres sures 20 to 150 lb gage. Sizes A> %> 1 and 1)4 in. Capacities from 220 to 5,600 lb of condensate per hour. SPRING PACKED VALVES--For lowpressure systems up to 15 lb. Heavy coil spring keeps packing tight around valve stem. Body and bonnet, cast brass. Sizes: )4 to 2 in. in 4 body patterns. Type U40 Radiator Valve PACKLESS VALVES--Packless con struction (no packing spring or stuffing box) provides tight permanent seal. Sizes: A to 1A 1' in 4 body patterns. HOT WATER VALVES--For hot water heating systems with pressure to 60 lb. Cast brass body. Packing nut, one-piece asbestos ring provides tight stem seal: Sizes: A to 2 in. No. 600 Radiator Valve PACKED STEM VALVES--For low- pressure .steam systems and hot water systems,up to 60 lb. Cast brass body and bonnet.'Sizes: A to 2 in. Electronic Control Panel DUNHAM HEATING SYSTEMS VARI-VAC DIFFERENTIAL HEATING saves up to 40 per cent on fuel because Vari-Vac automatically provides the exact amount of heat needed by using a continuous flow ot sub-atmospheric steam at temperatures that vary with tne weather. METRO single-riser method of piping, costs less to install and maintain. Provides continuous path for flow of steam from top to bottom of building. Continuous pipe runs down through overlying rooms and is offset into each room into Convectors or Baseboard radiation. 1602 C. A. Dunham Heating Systems vajjies DUNHAM HOT WATER HEATING EQUIPMENT DUNHAM CIRCULATORS Standard and high head capacity models for all water heating or cooling systems. Single spring motor cou pling. Special brand name motor with built-in over load protection. Extra-large oil reservoir. Field re placeable seals. FLOW CONTROL VALVES Completely automatic. No adjustment for wintersummer operation. Easy to clean without breaking pipe connections or removing valve mechanism. Angle pat tern: 1 to2)4 in. incl. Horizontal pattern: 1 to3 in. inch AIR SEPARATORS Automatically remove air from forced hot water heat ing system. One-piece construction. Positively prevents re-entry of air into system. 30 psi working pressure. Sizes: 34 to 2)4 in. incl. FLOW DIVERTOR FITTINGS Assure proper water flow through all radiation. Only one fitting normally needed (on return) for each unit of radiation. Size (thread to thread): 1 in. x )4 in. to 2 in x 1 in. incl.; (sweat to sweat): % in. x )4 in. to 1 in. x % in. incl. RELIEF AND REDUCING VALVES Pressure Relief Valves have extra-large diaphragm area, non-stick design..Factory set at 30 lb. Pressure Reducing Valves have built-in strainer.Factory set 12 lb. Adjustable. Combination Relief and' Reducing, Valves available. CIRCULATOR VALVES ' Extra-large flow area reduces water resistance and! cir culator load. T-type handle operates in only )4, turn. Straightway and angle patterns; thread or sweat; full range of sizes; 60 psi working pressure. BALANCING ELBOWS AND FITTINGS Extra-large flow area. Unique sloping seat provides Vshaped opening for accurate balancing from full open to any degree of closure. Thread or sweat: Complete line includes vent tees, union elbows, connectors. AUTOMATIC AIR VENTS Expansion Type Vents need no adjustment. Manual venting for rapid air removal when system is first filled. 50 lb working pressure. Float Type Vent has built-in siphon to prevent waterlogging. 35 lb working pressure. VARI-FLOW CONTROLS Fully automatic indoor-outdoor temperature controls for all types of hot water heating systems. No seasonal adjustment needed. Immersion bulb and capillary "wrap-around" types. DISTRIBUTOR HEADS For radiant panel and "spaghetti" type hot water heat ing. Same in. copper head usable for supply or re turn, both )4 and % in. tube connections. Each length has 14 pairs of connections. C. A. Dunham Company manufactures a complete line of quality heating equip ment. For catalogs and literature write: Dept. HVAC-55 C. A. Dunham Company, 400 W. Madison, Chicago 6, 111., or see your local Dunham Sales Engineer. 1603