HONEYWELL PROPORTIONING PRESSURETROL 10-300PSI

Pressure Range 10 to 300 PSI Pressure Differential 28 to 110 PSI Max Pressure Differential (PSI): 110 Max Pressure (PSI): 325 Temperature Range (F): 32°F to 150°F FEATURES • Models available for pressure systems up to 300 psi (2068 kPa). • May be used with steam, air, noncombustible gases, or other fluids noncorrosive to brass or phos-bronze (300 psi model) bellows. • When used with steam boilers, a steam trap (siphon loop) is recommended. • Wiper on controller potentiometer moves in response to pressure changes. • L91D has two potentiometers for unison control of two motors. • L91B,D models have adjustable proportioning (throttling) range to allow selection of desired pressure control range. • Adjustments made with screws on case top. • Large, easily-read scaleplates in both U.S. customary (oz/sq. in., psi, or in. Hg) and metric (kPa, MPa, or mm Hg) units. • Steel case with clear plastic cover to observe pressure settings and potentiometer action. • Fitting with 1/4 -18 NPT threads allows rapid installation. • Surface mount with screws through knockout holes in case back L91 Proportioning Pressuretrol Controllers are Series 90 Modulating Pressure Controllers that provide direct control of modulating motors or valves used on automatic burners or steam heating systems.