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Hoffman Specialty Co., Inc. Specialties, Healing Hoffman Ther-Kompo-Gagc HOFFMAN THER-KOMPO-GAGE Measures pressure up to 30 lb., vacuum to 30 in., and temperature to 225 deg. Pressure is registered in ounces up to 5 lb. Vacuum is shown in half inches up to 10 in. Temperature of steam or vapor being generated in the boiler is indicated on the thermometer. Used in Hoffman "Controlled Heat" installations or in one-pipe gravity vacuum systems equipped with No. 2 valves; indicates efficiency of the apparatus when a warm house is maintained with vapor at temperatures considerably below 212 deg. The No. 12 Hoffman Blast Trap is adapted for draining condensation from Indirect Radiators, Dryers, Drums,. Blast Coils, Unit Heaters, Hot Water Generators and Ends of Long Steam Mains or Risers. The Trap embodies the desirable feature of open bucket or float traps because it relieves condensation immediately upon its arrival at the trap regardless of the water temperature. Coupled with the float .is a thermostatic member which positively over comes the chief difficulty with float traps by automatically relieving air as well as condensation from the system. Table of Nominal Capacities, No. 12 Hoffman Blast Trap. 'No. It Hoffman Blast Trap Pressure. Pounds per Square Inch. . 'h Capacity. Pounds per Hour............. 800 Capacity, Square Feet Radiation.. 3200 1 1000 4000 2 1500 6000 345 1800 2000 2500 7200 "mo' 10000 Maximum Operating Pressure, 30 lb. Capacities for over 5 lb. pressure, furnished on application. With Strainer: inlet connection, 1 in.; outlet, 1 in. Without Strainer: inlet con nection, l%.in.; outlet, 1 in. *On the basis of lb. of condensation per square.foot per hour. No. 19 Quick Opening Hoffman Radiator Valve is of the semi-packless type for vacuum pumps installations or for vapor systems where modulation is not required. Made in ^ in. size only, capacity up to 200 sq. ft. C. I. Radiation. Regularly furnished in Lever Handle pattern. Wood Wheels or Lock Shields furnished on special order withou^ extra charge. Extension stems supplied at an extra charge. No. 18 Hoffman Radiator Trap No. is Hoffman Raduuar Valpe No 18 Hoffman Return Line Valve or Radiator Trap is similar in principle to the No. 8 Valve. It is intended for pressures up;to 15 lb. and radiators up to 100 sq. ft. Thermostats are interchange able and made of special Hoffman Diaphragm Metal that will not soften, stretch or crack under repeated action. Made with in. connections in Angle, Straightway, Right- ahd Left-hand Offset Patterns, For roughing measurements see page (758). Write for Descriptive Circulars 760 Hoffman Specially Co., Inc. --------. -- -- , r -- -. Specialties, Heating . TYPICAL INSTALLATION HOFFMAN "CONTROLLED HEAT" EQUIPMENT NOS. 20 AND 21 HOFFMAN THERMOSTATIC STEAM TRAPS Pressure Range 0 to 100 lb. Without Change or. Adjustment The Hoffman Steam Trap Body is of strong, rugged all bronze construction. The diaphragms in the thermostat, the valve pins and valve seat are all made of the same non-corrosive alloy which has been successfully used for diaphragms in Hoffman Valves for a number of years. The alloy withstands high temperature steam, and repeated action without softening or cracking. It also withstands the scoring action of steam. A strainer is built into the trap body permitting ready removal for cleaning. All renewable parts are interchange able, permitting replacement without adjustment of any sort. The trap is built to give maximum service with minimum attention and when repairs or cleaning are required the work can be quickly done. The Hoffman Steam Trap normally has a wide open vent port which is maintained until all air and condensation is relieved from the system, after which steam contact with No. to and ti the thermostat closes the port. No hand operated by- Hoffman Thermostatic Sttam Trap passes are required to vent air from the system. The trap cannot air-bind or freeze. The discharge capacity is dependent upon differences between the temperature of condensation delivered to the trap and steam temperature, the greater the difference the larger the capacity of the trap. The following tables give continuous discharge capacities. NO. 20 TRAP--Pressure 10 30 50 70 90 100 NO. 21 TRAP--Pressure 10 30 50 70 90 100 Temperature Drop 20"............ 275 550 715 820 900 925 375 725 925 1085 1190 1225 Temperature Drop 35"............ 725 1075 1380 1675 1830 I860 950 1410 I860 2250 2490 2550 No. 20 Trap has H in. pipe connections, % in. port. Weight No. 21 Trap has % in. pipe connections. % in. port Weight lb. lb. Write for Descriptive Circulars 761