Pressure Switches & Gauges
PressureTrol® Pressure monitoring modulating controllers L91A, B
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.
Overview
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
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L91A1037/U
PRESSURETROL
L91A1052/U
OPERATING RANGE 5-150 PSI, MID-SCALE T
L91A1078/U
PRESSURETROL
L91A1136/U
PRESSURETROL
L91A1151/U
OPERATING RANGE 5-150 PSI,MID-SCALE THR
L91A1169/U
CB P/N 817-00251, OPER. RANGE 0-15 PSI,
L91A1177/U
CB PART NO 817-00234 OPERATING RANGE 10
L91B1035/U
PRESSURETROL
L91B1050/U
PRESSURE CONTROL
L91B1068/U
PRESSURETROL
