Document 5y08Zzzqj5XxyMGMOboQ6b35

Controls and Instruments Spence Engineering Company, Inc. 28 Grant Street* Walden, N. Y. The SPENCE Type ED-W27 TwoStage Pressure Reducing Station is designed to serve a heating system depend ably, at low cost and with utmost safety. The primary is a pilot operated, Type ED Pressure Regulator. SECO Metal trim affords guaranteed resistance to wiredrawing. The secondary is a direct operated, Type W27 Valve, simply con structed, yet engineered for long, trouble-free, heating duty. Note that the Diaphragm of the* SPENCE Safety Pilot is connected to the low side. Should the secondary valve fail, this Pitot will assume control of the prinary; thereby effecting a one-stage reduction from primary to final delivery pressure. ^By adding a SPENCE Solenoid Pilot any SPENCE ^ Regulator may be cut on and off electrically. A Spence Type E2T100 Temperature Regulator re duces the steam pressure in addition to accurately modu lating the flow as required to control the temperature. No separate reducing valve is necessary. The Spence design pro vides a self-operated, pilot controlled regulator entirely packless in construction and guaranteed to shut tight. SECO Metal seats and discs will not be cut by the wire drawing action of steam. Spence thermal elements are not injured by overheating. 1298 Pilot Type T100 is weightloaded for,heaters requiring not more than 10 psi pressure. Pilot Type T150 is spring-set for pressures up to 50 psi. . Either maybe used on a stor age or instantaneous heater in combination with a* main valve selected to suit the ini tial steam conditions. 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: sizesK in., K in-, 1 in.jmax. pressure 15, 65, 100, 125 psi; Angle, Straightway, Corner, Vertical Body Styles. Float and Thermostatic Traps: sizes ^ in. to 2 in.; max. pressures 15, 100 psi. Strainers: max. pressure 125 psi; Cast Iron Sizes 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 and 4200 Series (illustrated): neat, convenient unit with either steel or cast iron tank. Dual voltage ca pacitor type motor and carbon type rotary seal--for all jobs up to 14;000 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 under ground or in wet locations. 2000 to 20,000 sq ft, 20 or 30 psi. Vacuum Pumps: Type V, 2500 and 5000 sq ft, 20 psi. Type S, 10,000 to 40,000sq ft, 20 to 40 psi. 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: H in., % in., % in., 1 in., in., in., 2 in. 1299