Document VaLjM39nabvJqzdZY6Kn0KN4

Controls and Instruments Spence Engineering Company, Inc. 28 Grant Street, Walden, N. Y. SPENCE METAL DIAPHRAGM "DEAD END" REGULATORS Advantages of Spence Regulators Dead-end Shutoff--Spence Regulators are guaranteed to hold a dead-end. Single Seat--Spence'design makes pos sible a balanced single seat even in large sizes. Metal Diaphragms--Under normal con ditions never require replacement. SECO Metal--Guaranteed to resist the wiredrawing action of steam. Interchangeable Pilots--Any type of pilot will fit any size main valve. Accessibility--Pilot is connected to main valve with unions. Accurate Regulation--Regardless of fluc No Stuffing Boxes--All main valves and tuations in either load or initial pressure. most pilots are packless. Spence Weather Compensator and Orifice Zone Control System; This simple, dependable Control, when installed on a properly de signed orificed heating system, will show a substantial degree-day steam saving, at a low mainte nance cost. The delivery pressure of the Regulator is automatically ad justed in direct proportion to the building heat losses. In other words, as the losses become greater, steam pressure on the sys tem is automatically increased. Any number of zones can be con trolled by one automatic Signatrol, automatic Wind Loss Compensator (Anemometer), Time Switch and Master Control Panel equipped with Manual and Automatic-Dials for each zone._In__t_h_i_s_w__a_y each zone can be set individually and at the same time be under the Master Control. Pressure Regulator-- Type ED Designed to regulate a steady or varying initial pressure so as to main tain a constant,, adjust able, delivery pressure. Applicable to heating systems, power. plant operations, or manufac turing processes. Combined Temperature and Pressure Regulator --Type ETD Self-contained, pilot oper ated, dead-end. Designed to control flow of fluid to a heat ing or cooling element, so as to maintain a constant, ad justable temperature, and protect the element against excessive pressure. Electrically Operated Valve--Type EM Can be opened or closed independently by an elec trical switch. Type ET--Same as ETD except pressure con trol is omitted. Ordera SPENCE Regula tor for 40 days' free trial. Fall-O'!Matic Universal Pipe Intersection Cutter. 1240 Controls and Instruments Sterling, Inc. 3738 North Holton Street Milwaukee 12, Wisconsin- Heating and Temperature Control Products Distributed through leading Heating and Plumbing Wholesalers Sales Representatives in Principal Cities HEATING SPECIALTIES Thermostatic Traps: sizes *4 in., % in., 1 in.; max. pressure 15, 65, 100, 125 psi; Angle, Straightway, Corner, Vertical Body Styles. Float and Thermostatic Traps: sizes M in. to 2 in.; max. pressures 15, 100 psi. Strainers: max. pressure 125psi; Cast Iron Sizes 14 in- to 2 in.; Brass Sizes % in. to 1 in. Also Vents, Radiator Valves, Boiler Return Traps. Illustrated at right is the compact, sturdy % in. 69B F & T Trap, which like all other Sterlco traps has a bellows type thermostat and replaceable seats and valve members. CONDENSATION and VACUUM PUMPS 4100 Series (illustrated): neat, convenient unit with 15 gal tank, dual voltage capacitor type motor, and carbon type rotaryseal--for all jobs up to 6000 sq ft EDR, 20 psi. 3500 Series: heavy duty units with pedestal mounted steel tank for a wide range of jobs--2000 to 65,000 sq ft, up to 150 psi. 3700 Series: with heavy cast iron tank for installation underground or in wet locations. 2000 to 20,000 sqft, 20 or 30 psi. 3800 Series: up to 10,000 sq ft, 20 or 30 psi. Vacuum Pumps: Type V, 2500and5000sq ft, 20 psi. Type S, 10,000to40,OOOsqft, 20 to40psi. TEMPERATURE CONTROL VALVES No. 120 Thermotrol (illustrated): self-contained individ ual radiator temperature control for steam or hot water. Easily installed in place of manual radiator valve with-' out wiring or other external connections. Tank Tem perature Controls: self-powered modulating control valves for fluid heaters .and process equipment.. Sizes; Y% in., in., % in., 1 in., 1K in., 1)4 in., 2 in. 1241