it is rated for use in 2-pipe low-pressure steam heating systems where RAV or RAVL bodies are installed

Standard industry practice for the E3Point series recommends a visual inspection and bump test every 6 months to ensure the sensor filter is not blocked and the electrochemical cell remains responsive to gas

providing a reliable solution for restoring quiet operation and eliminating vibration-induced wear on HVAC centrifugal fans and blower shafts

Does this sensor require re-calibration after range selection

Because these are factory-sealed units

McDonnell & Miller 51-HD Mechanism Els PW 29614 it is rated for useThe McDonnell & Miller 51 HD Mechanism (Part Number 134900) is a heavy duty mechanical water feeder designed for low pressure steam and hot water boilers. Engineered for high capacity applications, this replacement water feeder head maintains precise water levels in vessels with a maximum pressure of 35 PSI. As a veteran technician knows, the heavy duty 51 HD series is built to withstand more demanding cycles than standard residential feeders,