Document Evo1V3oqKDp7pMRdrmLD46Y7N

Hoffman Specialty Co., Inc. Specialties, Heating Hoffman Kompo-Gage HOFFMAN KOMPO-GAGE Measures pressure up to 30 lb., vacuum to 30 in. Pressure is registered in ounces up to 5 lb. Vacuum is shown in half inches up.to 10 in. Used in Hoffman "Controlled Heat" installations or in onepipe gravity vacuum systems equipped with No. 2 valves; in dicates efficiency of the apparatus when a warm house is main tained 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. .t 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. No. IS Hoffman Blast Trap Table of Nominal Capacities, No. 12 Hoffman Blast Trap Pressure; Pounds per Square Inch.. V4 Capacity, Pounds per Hour............ 800 Capacity, Square Feet Radiation.. 3200 1000 4000 2 1500 6000 3 1800 7200 4 2000 8000 5 2500 10000 Maximam Operating Pressure, 30 lb. Capacities for oyer 5 lb. pressure, furnished on application. With Strainer: inlet connection, 1 in.; outlet, 1 in. On the basis of K lb. of condensation per square foot per hour. i No. 19 Quick Opening Hoffman Radiator Valve is of the semi-packless type for vacuum pump 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 without extra charge. Extension stems supplied at an extra charge. No. 18 Hoffman Radiator Trap No. 19 Hoffman Radiator ValK 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 of crack under repeated action. Made with x/i in. connections in Angle, Straightway, Right- and Left-hand Offset Patterns. For roughing measurements see page (802). Write for Descriptive Circulars 804 Specialties, Heating TYPICAL INSTALLATION HOFFMAN "CONTROLLED HEAT" EQUIPMENT .. ^cfTT) TYPICAL HOFFMAN CONTROLLED HEAT" INSTALLATION. NOTE.--Loop discharges into high end of return main. This results in venting airfrom high point tn return instead oflout point. Point^W" shouldbeat least iiin.aboveutaterlineutilk Nos. 0 and0 loopsandSOin. with Nos. 03 and 04- 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 scoArinsgtraaicnteiornisofbustieltamin.to 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 the thermostat closes the port. No hand operated by-. Hot. to and tl Hoffman Thermostatic steam Trap passes are required to vent air from the system. The trap canTnohteadiri-sbcihnadrgoer cfraepeazec.ity 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 table gives continuous discharge capacities in pounds per hour. NO. 21 TRAP NO. 20 TRAP Pressure, lbs. per sq. in....... | Temperature Drop 20.... 275 Temperature Drop 35.. 725 550 715 1580 70 820 1675 900 1830 100 925 1860 375 950 30 725 1410 50 l 70. 90 1 100 925 1085 1190 1225 1860 1 2250 I 2490 2550 No. 20 Trap has K in. pipe connections, & in. port. Weight 3}4 lb. No, 21 Trap has in. pipe"connections, 3 in. port Weight 3% lb.;