Document RJ6gVy4meyekeQyjKeB9vkN9B

Hoffman Specialty Co., Inc. Specialties, Healing BELLOWS TYPE THERMOSTATIC TRAPS No. 17-A The No. 17-A Radiator Trap has a hydraulically formed bellows thermostat attached to cap. Hydraulic forming process automatically places severe pressure test on bellows. Valve pin is of special nickel-silver alloy. Capacity, 200 sq. ft. direct radiation. Valve port, % in. Maximum guaranteed operating pressure, 15 lbs. Angle pattern or with swivel con nection. Connections H in. or % in. inlet and % in. outlet. No. 17-V is same as No. 17-A except is made in a vertical pattern for concealed type radiators. ^ in. connections. The No. 18-A Radiator Trap is also equipped with the "tested-m-the-making ".hydraulically formed-bellows: Ther mal members are interchangeable in all No. 18-A bodies without adjustment. Valve port, % in. Nominal capacity. --400 sq. ft. direct radiation. Angle pattern with in. or % in. connections. Also furnished with M in. inlet and ^ in. outlet and with swivel connection. Maximum guaranteed operating pressure, 15 lbs. No. 18-A No. 9-A A novel feature of the No. 8-A Radiator Trap is the combination of all vital parts--bellows, valve pin and valve seat, into a single unit which threads into the body and the joint is sealed by a soft copper gasket. The valve pin and renewable seat is of a special wear- resisting nickel-silver alloy. Valve port, %/% in. Nominal capacity -- 400 sq. ft. direct radiation. No. 8-A Angle pattern with % in. or yi in. connections. Also furnished with ^ in. inlet and % in. outlet and with swivel connec tion. Maximum guaranteed operating pressure, 25 lbs. or 50 lbs. on special order. No. 9-A is similar to the No. 8-A in con struction, except with % in. inlet and out let connections. Furnished in angle pat tern only, with or without union connec tion. Valve port, J/ye in. Nominal capa city--700 sq. ft. direct radiation. Maxi mum guaranteed operating pressure, 25 lbs. or 50 lbs. on special order. With cage unit removed for cleaning out a new system the outlet .opening is in. allowing free.passage of sludge, etc. All The swivel connec tion provides straight way, right or left hand offset or any interme- 'diate angle. The fitting is reversible, giving the option of two rougning- in dimensions. cage units interchangeable. No. 10-A The No. 10-A is a heavy duty thermostatic trap for dripping unit heaters, short steam mains, risers, etc., where a cooling leg (for temperature drop) can be installed. The bellows thermal member is water-filled to enable it to withstand severe service; and is interchangeable in No. 10-A bodies without adjustment. Nominal capacity, 2800 sq. ft. direct radiation. Valve port, %6 in. Iron body--angle pattern--without union. Maximum guaranteed operating pressure, 25 lbs. Connections 1 in. The Nos. 20 and 21 Thermostatic Steam Traps operate on pressures from 0 to 100 lbs. without change or adjustment. Bodies are all bronze with integral strainer. The hydraulically formed bellows is water-filled to better withstand the shocks usually encountered in', high pressure service. Thermal members inter changeable without adjustment. Valve pin and renewable seat is of special nickel-silver alloy. No. 20--in. connections--in. valve port. No. 21--% in. connections--M in valve port. 896 Not. tO and tl Hoffman Specialty Co., Inc. Specialties, Heating FLOAT AND THERMOSTATIC TRAPS Hoffman Drip Traps, Nos. 23, 24 and 25, have a direct acting float controlling a double port balanced valve. This con struction gives relatively large capacities in proportion to size and weight of trap, making them especially suitable for draining risers, mains, unit heaters and other apparatus where the operating pressure does not exceed 15 lb. per sq. in. "T" type traps have thermostatic air vent while in " A" type the vent is omitted. Nos. ts.ti andt5 _ TheNos.-26,-27, 28 and 29 Heavy Duty Traps also employ the balanced valve prin ciple,- giving large capacity and permits a small compact body. Traps have iron bodies, bronze or nickel-silver working parts and seamless copper float. They, are used to drain long steam mains, blast coils, hot water generators, unit heaters and other equipment where operating pres sure does not exceed 30 lb. per sq. in. "T" type traps have thermostatic air vent while in "A" type the vent is omitted. Not. S6, S7. tS and 29 HOFFMAN "CONTROLLED HEAT" EQUIPMENT WITH DIFFERENTIAL LOOP Hoffman "Controlled Heat" is a two-pipe vapor- vacuum system of heating, using the No. 7 Adjustable Orifice Modulating Valves for balancing the distribution of steam and controlling the radiator output. Hoffman traps are used at the return end of the radiators. Where hard coal is used as fuel and the installation does not require a normal operating pressure in excess of eight ounces, the Differential Loop equipment is recommended. The Loop is a non-mechanical device which insures the return of condensate to the boiler should the pressure exceed that at which it will return by gravity. Differential Loop The No. 15 Valve is used only in conjunction with the Differential Loop and functions to relieve the air from the entire system and prevent its return. Damper Beffulalcr The No. 13 Damper Regulator is extremely sensitive in con trolling the drafts to meet slight changes in the demand for steam. A compensating plate prevents the accumulation of water on the diaphragm when it is depressed, maintaining perfect balance at all times. Connection, 1 in. The No. 14-A Kompo Gage measures pressure up to 30 lbs., vacuum to 30'inches. The pressure side is graduated in ounces up to 5 lbs. and vacuum is shown in half-inch graduations up to 10 inches. Connection in. 897 Kompo Gage