Document MG15Dnd6Nv00odv9bQOgLMwXM

Valves Alco Valve Company, Inc. AUTOMATIC REFRIGERANT CONTROL VALVES 2626 Big Bend Blvd. St. Louis, Mo. THERMO EXPANSION VALVES--They assure posi tive independent, automatic control of liquid feed in each refrigerated unit of a multiple system. They automatically regu late liquid feed arid suction pressure in accord with the refrigerating load in any unit thereby materially increasing the efficiency of the compres sor as well as the evaporating coils. They provide a positive method of obtaining a maximum wet interior surface in any type of evaporator. ' They are sensitive to the slightest change in suction superheat, but are adjustable to control the liquid flow at any required degree of suction superheat without permitting the return of liquid refrigerant to the compressor. There is a size and type for all refrigerants and all capacities from fractional tonnage to 60 tons Ammonia, 100 tons Methyl Chloride, or 50 tons Freon. MAGNETIC LIQUID STOP VALVES --are positive acting, and tight closing. They are indispensable wherever instan taneous closing of the liquid supply line is in dicated. They are used extensively with expan sion valves where the tem perature difference be tween the refrigerant and the refrigerated substance or area is very small. They are also used ex tensively with Alco Float Switches to maintain a constant liquid level in flooded evaporators. All types are available in all the ordinary pipe sizes up to 1}4 in., and for tonnage capacities ranging from fractional tonnage to 350 tons Ammonia, 115 tons Methyl Chloride, or 55 tons Freon. MAGNETIC SUCTION STOP VALVES--are designed for use as suction line shut-off or as low side by-pass valves. They are built without packing so as to operate successfully on heavily frosted lines. Makes pos sible individual control of two or more evaporating units in a multiple system even though there is a wide difference in tem perature requirement or load conditions.^ They provide individual tem perature control in any number of refrigerated units in a series system either flooded or fed by a constant pressure expansion valve. ' Built in J^in., 1 in., lKim. lMin., or 2 in., sizes. LIQUID FLOAT VALVES-- are provided with a pat ented vent tube inside the body which prevents gas binding, and permits the valve to be installed at the highest point on a full flooded system even though many feet above the liquid receiver. They may also be installed at a low point in the system and will perform their function equally as well. Available in a variety of capacities up to 25 tons Ammonia, 10 tons Methyl Chloride, or 5 tons Freon. ELECTRIC FLOAT SWITCHES are highly ef ficient for the maintaining of a constant liquid level in individual flooded evaporators. Particu larly desirable for use on tubular coolers. There is no liquid flow through the Float Switch. By means of its electric switch, it operates a magnetic valve in the liquid line, thereby maintaining the desired liquid level to within a limit of less than one inch. 1126 Valves, Air The Dole Valve Company Main Office and Factory:' 1901-1941Carroll Avenue, Chicago, 111. Branch Offices and Representatives in All Principal Cities The Dole Valve Company is a progressive manufacturer of air and vacuum valves for one or two pipe steam and hot water heating systems. There is a Dole Air and Vacuum Valve for every purpose. The line is complete and it is kept up to date by aggressive designing, engineering and manufacturing policies. Our latest contributions are the new DOLE NO. 3A (% in. connection), NO. 3B 04 in. connection) and NO. 3C (% in. male, Y in. female connections) AIR VALVES. Here is a picture of the No. 3C Air Valve. "L1 These Dole Nos. 3A, 3B and 3C Air Valves are designed to meet the in creasing demand for popu larly priced straight shank valves . that give satis factory venting perform ance on systems where ex treme water conditions are encountered. They posi tively do not "stick" or spit water and they insure free venting at any pres sure up'to 15 lb. Look at the illustrated installation suggestions. Notice that a nipple con nection is not required when Dole No. 3 Air Valves are installed on either cast iron or copper convectors, provided the heater has sufficient space to accommodate the siphon tube. Do not cut or bend this tube. Another important ad dition which rounds out the Dole line is the DOLE NO. 7 SIGNAL AIR VALVE for venting con cealed hot water convec tors or radiators. This valve actually signals the operator when all the air is expelled. It is very easy to operate (no holding a cup to catch the water overflow) and it is easy to install. Dole Air and Vacuum Valves for other venting purposes on one or two pipe steam and hot water heating systems are the No. 2B Vacuum Valve, No. 6B Vacuum Valve, No. 100 Vacuum Valve, No. 103 Vacuum Valve, No. 2 Vacuum Valve, No. 6 Vacuum Valve, No. 1 Air Valve, No. 4 Quick Vent Valve, No. 5 Quick Vent Float Valve, No. 8 Quick Vent Valve, No. 9 Quick Vent Vacuum Valve, No. 1933 Air Valve, No. 10 Hot Water Key Valve and the Dole Compound Gauge. Dole Air and Vacuum Valves that are equipped with the new Vari-Vent feature for "balancing" one pipe steam heating systems are the No. 2B Vari-Vent Vacuum Valve, No. 100 Vari-Vent Vacuum Valve, No.' 101 Vari-Vent Vacuum Valve, No. 1 Vari-Vent Air Valve and hlo. 3A-Vari-Vent Air Valve. We have prepared "folders and illustrated price sheets on the whole Dole Air and Vacuum Valve line. These are not only informative but make splendid sales material. They are yours for the asking. 1127