Document 0JY86NmorwkwXDoRwNYJoxZZO

C. A. Dunham Co. Heating Systems v3ves*nd RADIATOR TRAPS-For all types of low pressure steam beating 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 lK rf nnnrffinsate ner hour. Types OB and OBS Bucket Traps 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 gauge working pressure. Sizes: %, 1, 1)4, 1/4 and 2 in. with capacities from 100 to 5,750 lb of condensate per hour. 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 gauge. Sizes )4, 1 and 1)4 in. Capacities from 220 to 5,600 --j---------- *------------- SPRING PACKED VALVES--For lowjressure systems up to 15 lb. Heavy coil ipring keeps packing tight around valve kditem. Body and bonnet, cast brass, -""o' tn 2 in. in 4 body patterns. No. HO Radiator Value No. 600 Radiator Valve PACKLESS VALVES--Packless con struction (no packing spring or stuffing box) provides tight permanent seal. Sizes: )4 to 1)4 'n- 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: )4 to 2 in. PACKED STEM VALVES--For lowpressure steam systems and hot water systems up to 60 lb. Cast brass body and bonnet. Sizes: )4 to 2 in. Electronic Control Panel 1UNHAM HEATING SYSTEMS ARI-VAC DIFFERENTIAL VARI-VAC HEATING saves p to 40 per cent on fuel -because VARI-VAC automatically rovides the exact amount of heat needed by using a continous flow of sub-atmospheric steam at temperatures that vary 'ith the weather. IETRO single-riser method of piping, costs less to install nd maintain. Provides continuous path for flow of steam rom top to bottom of building. Continuous pipe runs down hrough overlying rooms and is offset into each room into :onvectors or baseboard radiation. 1620 C. A. Dunham Heating Systems DUNHAM CIRCULATORS Standard and high head capacity models for all water heating or cooling systems. Single spring motor coupling. Special brand name motor with built-in overload protection. Extra-large oil reservoir. Field replaceable seals. FLOW CONTROL VALVES Completely automatic. No adjustment for winter-summer op eration. Easy to clean without breaking pipe- connections or removing valve mechanism. Angle pattern: 1 to 2)4 in. incl. Horizontal pattern: 1 to 3 in. incl. AIR SEPARATORS Automatically remove air from forced hot water heating sys tem. One-piece construction. Positively prevents re-entry of air into system. 30 psi working pressure. Sizes: )4 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):-)4-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. Combina tion Relief and Reducing Valves available. CIRCULATOR VALVES Extra-large flow area reduces water resistance and circulator 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 V-shaped 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 water logging. 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 heating. Same 1)4 in. copper head usable for supply or return, both )4 and % >n- tube connections. Each length has 14 pairs of con nections. C. A. Dunham Company manufactures a complete line of quality heating equip ment. For catalogs and literature write: Dept. HVAC-56 C. A. Dunham Company, 400 W. Madison Street, Chicago 6, 111., or see your local Dunham Sales Engineer. 1621