Document 7OwpaoyXnw9yN3j08nB76Ed2o

Maid-O'-Mist, Inc. , Heating Systems Aj^tanditioning * CONVECTOR HUMIDIFIER Maid-0'-Mist Convector Humidifier has no fiat bottom to block the flow of warm air. Their individual ^ in. copper water troughs are spaced 1 in. apart to allow un restricted air flow between the evapo rator pads. Maid-O'-Mist Convector Humidifiers are designed for use with radiators and cabinet convectors in hot water heating systems and for all types of warm air furnaces. t Trough Convector Humidifier NO. SO SERIES FLOAT CONTROL VALVES The No. 50 Series Float Control Valves are precision designed to fill requirements for humidifying units, pan fillers, air conditioning equipment, evaporative coolers, air washers and other applications where dependable water level control is essential in limited space to meet various operating conditions. (No. St float control valve) fNo.5S float control valve) *No. 51 Float Control Valve. Only 5% in. long overall, including copper float which is 214 in. diameter by 1J4 in. deep. Valve body is made of hex-brass rod with removable, raised, hard nylon valve seat. Valve stem is brass with an incased heat and oil resistant, special Neoprene washer. Valve seat is protected with a 100 mesh Monel Metal screen. Valve body is fitted with two Zi. in. I.P. locknuts for horizontal mounting securely in -Kg iu. hole--or valve may be screwed directly into tapped opening. Supply is equipped with union coupling, for % in. O.D. copper tubing. Working pressures up to 85 lbs, with capacity of \4 gal per minute at 50 lbs pressure. 'No. 52 High Duty Float Control Valve. Same general construction as No. 51 but de signed for use where a larger volume of water is required. Capacity 1 gal per minute at 50 lbs pressure, with working pressures to 125 lbs. Overall length 8 in. with over sized float V/4 in. diameter by 4% in. long. No. 53 High Duty Float Control Valve. Same general construction as No. 52 except valve is vertically mounted with special bracket as integral part for mounting on reservoir or pan, well above water line. Only in. long. Non-back-siphoning when installed according to instructions. No. 59 Float Control Valve. Same general construction as No. 51 valve, except valve is vertically mounted with special bracket as integral part for mounting on reservoir or pan, well above water line. Non-back-siphoning when installed according to in structions. Only 5 in. long. NOTE: Nos. 51, 52, 53 and 59 can be furnished with a % in. I.P. male connection at additional cost, when specified on order. Series 6900--Water Line Float Control Diaphragm Valves. The No. 6900 Series float control valves are heavy duty large capacity water level controls. Rugged, strong and precision made, the cast brass body is fitted with a removable chromium valve seat. Controlled water level is accomplished through the action of the oversized copper float, linkage and special Neoprene diaphragm. Valve can be furnished to discharge water in an upward or downward position as specified. Inlet and outlet tapping % in. I.P. Capacities from IZL gal to 6 gal per min. The No. 6927 Brass Mount ing Plate (3 in. diameter) with gasket and screws is used where special mounting of the No. 6900 Series Valves is necessary. Write for prices and descriptive literature. 1612 Heating Systems Steam Unit Heaters JOHN J. NESBITT, INC. Philadelphia 36, Pa. NESBITT UNIT HEATERS are designed to circulate large volumes of air at comparatively low temperatures, assuring quick heating. Ratings of Nesbitt Unit Heaters are based on tests made in accordance with standard test code of Industrial Unit Healer Association and ASHVE. PROPELLER FAN UNIT HEATERS Pig. /. Standard Propeller-Fan Type Designed to incorporate four characteristics essential to both proper application and satisfactory performance: 1.) Selective range of sizes. Manufactured in nine sizes. Heating capacities from 34,700 to 338,000 Btu per hour. Air deliveries from 470 to 4800 cfm. 2.) Quiet Operation. All 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 low speed or two speed (optional). 3.) Durable lightweight Heating Elements. Standard or low temperature, extended finand-tube type, constructed of copper condensing tubes find plate-type aluminum fins. 4.) Modem Casing Design. Compact suspended type. Pub. 401. GIANT BLOWER-FAN UNIT HEATERS Large capacity units for: heating and/or ventilating, free delivery or static pressure, steam or water systems. Twelve basic sizes, each with one of three standard steam coils, three distributing-tube coils, or with a single, two, three, or fourrow hot water coil. Air deliveries from 2000 to 28,000 cfm. Basic steam ratings, 83,000 to 1,735,000 Btu/hr. Hot water capacities from 50,1000 to 2,460,000 Btu/hr, 1800 to 3400 fpm. Control may be STANDARD--periodic fan operation; THERMADJUST--continuous fan operation with thermo stat-controlled dampers; or VALVE-CONTROLLED--with thermostat controlling steam supply. Horizontal-suspended, wall, inverted or floor-mounted with wide choice of cowls, fans, dampers, filters and other accessories. Pub. 404- Fig. t. Blower-Fan Type LITTLE GIANT UNIT HEATERS Adaptable to a wide variety of applications and field condi tions. Eight basic sizes, each with a choice of two (some units three) heating elements. The three smaller sizes are of the blow-through type, having lower outlet velocities generally intended for the lower mounting heights of commercial in stallations. These sizes in down-blow type only. The five larger models are of the draw-through type; produce the high discharge velocities necessary to blow long distances. These five available for either horizontal or vertical down-blow. . Durable lightweight Heating Elements. Extended fin-andtube type, copper condensing tubes and plate-type aluminum fins. Steam capacities from 28,500 to 510,000 Btu. Pub. 40S. SERIES "C" UNIT HEATERS The new Series "C" permits complete flexibility of design and operation. Units are available for floor mounting, hori zontal, wall or inverted applications and can be installed fully recessed, semi-re cessed or free standing. The discharge or intake can be face, top or bottomdirect or witb ducts. Available in five basic sizes--46 basic capacities ranging from 25,000 to 148,000 Btu per hour. For steam or hot water. Pub. 40S. Fig. 4. Series "C" Unit Heater. 1613