PressureTrol® Pressure monitoring modulating controllers L91A, B

Features & Benefits:

• 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 back of casing