Document k62151DLgGq9bb7prd5QQvabq

Controls and Instruments j '2_ Spence Engineering Company, Inc. 28 Grant Street, Walden, N. Y. The SPENCE Type ED-W27 Two- Stage Pressure Reducing Station is de signed 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, heatingduty. Note that the Diaphragm of the SPENCE Safety Pilot is connected to the low side. Should the secondary valve fail, this Pilot will assume control of the primary; thereby effecting a one-stage reduction from primary to final delivery pressure. A Spence Type E2T100 Temperature _R_e,,g_u_l_a_to_r _re_d_u__ce_s the steam pressure in addition to accurately modulating the ^ flow as required to control the temperature. No separate reucing valve is necessary. By adding a SPENCE Solenoid Pilot any SPENCE Regula tor may be cut on and off electrically. 4- The Spence design provides a self-op erated , 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 ele ments are not injured by overheating. Pilot Type T100 is weight-loaded for heaters requiring not more than 10 psi pressure. Pilot Type T150 is spring-set for pressures up to 50 psi. Either may be used on a storage or instantaneous heater in combination with a main valve selected to suit the initial steam condi tions. 1324 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 Representathes in Principal Cities HEATING SPECIALTIES Thermostatic Traps: sizes A in., M in- 1 in.; max. 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 A in- to 2 in.; Brass Sizes % in. to 1 in. Also 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 capacitor 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 ped estal 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 sq ft, 20 or 30 psi. Vacuum Pumps: Type V, 2500 and 5000 sq ft, 20 psi. Type S, 10,000 to 40,000 sq ft, 20 to 40 psi. TEMPERATURE CONTROL VALVES No. 120 Thermotrol (illustrated): self-contained individual radiator temperature control for steam or hot water. Easily installed in place of manual radiator valve without wiring or other external connections. Tank Temperature Controls: self-powered modulating control valves for fluid heaters and process equipment. Sizes:% in., A in., in., 1 in., m in., in., 2 in. 1325