Document 82ML4xqYva53pvR1qB7LaLMRK

Warren Websler & Company Heating Systems Steam Unit Heaters Table 1. Recommended Ratings in Sq Ft E. D. R.* The ratings below are conservative and not full-flooded capacities. Applications requiring use of higher ratings should be referred to the Company or its Repre sentatives. When writing give full details of proposed use. Select trap by rating, not by pipe size. Symbol Size Pressure Difference Across Trap in Lb per Sq In. i i i'/i 2 5 10 15 702HF 713HF 723HF w 165 200 V." 330 400 VC 580 700 235 370 530 640 465 730 1050 1300 810 1280 1840 2300 Based on 240 Btu per sq ft per hour. FLOAT-AND-THERMOSTATIC TRAPS brass valve piece and seat insert. Angle model only. Sizes: Ys, Vi, Ye and 1 in. Extensively used with laundry, cooking, sterilizing and other process-steam uses. Series "79"--For use where large volumes of very hot condensate form more quickly than can be discharged by thermo static traps alone. Float and thermostatic traps designed for normal working pres sures between 15 and 150 lb per sq in. Water of condensation is passed through a float-controlled seat opening while air is discharged into the return piping by a thermostatically controlled vent- Com pact and light in weight. Can be readily mounted in a pipe line without other support. Available with 1 in. inlet and outlet. Readily bushed for smaller pipe sizes. Cast iron body, composition gasket and cover bolted together with steel cap screws. Monel Metal or brass valve piece and stem. Stainless steel seat. Air vent unit is Monel Metal diaphragm with Stainless Steel or brass valve piece and brass seat with Stainless Steel insert. DIRT STRAINERS AND POCKETS Placed in return lines of steam heating systems to prevent dirt, rust and scale from impairing tightness of traps. Fig. 6. Websler Size OOOS6-T Drip Trap has rated capacity of 00 lb Water per Hour at lb Pressure Difference Series "26"--A heavy duty trap for drips of mains, blast radiation, unit heaters, hot water generators and similar applications. A rugged float-type trap available with and without thermostatic air vent. Made in five sizes: 200, 500, 1200, 2400 and 5000 lb water per hour at 2 lb pressure difference. Maximum working pressure is 15 lb per sq in. PROCESS STEAM TRAPS Series "78" --thermostatic trap built for process steam pressures (10 to 150 lb per sq in . ). ' Monel Metal dia phragm. Stainless Steel or Fig B webst,, Size 7se Trap Fig. 7. Size S^C-t Websler Boiler Protector with Lew Watgr Electrical Cut-out Switch. Size 34 has no Cut-out Switch BOILER PROTECTOR Prevents breakage in low pressure heating boilers when water level becomes inadequate. Automatically supplies raw water to boiler when water level drops to 1 in. above bottom of gage glass. For maximum boiler pressure of 15 lb per sq in. Maximum cold water main pressure should not exceed 150 lb per sq in.; minimum must not be less than 25 lb per sq in. Made with % in. connections, with or without electrical cut-out switch. 1064 Warren Webster & Company Heating Systems Steam Unit Heaters WEBSTER-NESBITT UNIT HEATERS Are manufactured by John J. Nesbitt, Inc., Holmesburg, Philadelphia 36, Pa., and are distributed solely through Warren Webster & Company, Camden, New Jersey. Designed to circulate large volumes of air at comparatively low temperatures, assuring quick heating. Ratings of Webster-Nesbitt Unit Heaters are based on tests made in accordance with standard test code of Industrial Unit Heater Association and A.S.H.V.E. All Products Listed are /V'oio Manufactured with Steel Heating Elements PROPELLER FAN UNIT HEATERS Fig. 11. Standard Propdler-Fan Type Designed to incorporate four character istics proved by wide experience to be essential to both proper application and satisfactory performance: 1.) Selective range of sizes. Manu factured in nine sizes. Heating capacities vary from 31,000 to 305,000 Btu per hour. Air deliveries from 470 to 4800 cfm. GIANT UNIT HEATERS Sturdy blower-fan units for the econom ical heating of large areas. Standard (Non-Ther- madjust) Type. Used principally where heat ing is by recirculation only, and where con stant heat output is desired during period of operation. Thermadjust Type. Employs dampers in rtg front of casing and Blower-Fan Type over face of heating element to provide mixing of unheated and heated air, producing heat output in accor dance with requirements and continuous circulation of air volume. Valve Controlled Type. Unit is of stand ard casing arrangement but equipped with Nesbitt Heating Surface with Steamdistributing Tubes which allows for auto matic control of heat output. Floor mounted, wall mounted, ceiling suspended, from 254,000 Btu, 4950 cfm, to 845,000 Btu, 15,000 cfm. Write for details. Catalog W-N 116. LITTLE GIANT UNIT HEATERS 2.) Quiet Operation. Al) fans have blades of exceptionally large areas and of a shape to impart a gradual acceleration to the air stream. Ample spacing is maintained between the fan and heating element. Motors are of sleeve bearing type and equipped with isolators. 3.) Durable lightweight Heating Elements., Extended fin-and-tube type, constructed of steel condensing tubes and plate-type steel fins (copper when permitted by government regulation). 4.) Modern Casing Design. Compact suspended type. Catalog W-N 123. Fig. 13. "Little Giant" Down Blow Type New, light compact draw-through high velocity down blow unit heaters. 165,000 Btu, 3420 cfm to 450,000 Btu, 10,600 cfm at basic rating of 2 lb steam and 60 deg entering air. Down Blow Type. Generally used when the presence of cranes and other machinery requires that the unit and piping be located well above the floor level. Write for details. Catalog W-N 118. 1065