McDonnell & Miller 157S-R-M Pump Controller Els PW 17895 allowing a high volume of

allowing a high volume of air to vent rapidly through a separate orifice

this 1075 RPM single-phase motor provides the reliable torque required for consistent airflow in high-static environments

This RS232 to RS485 communication converter supports daisy-chained networks up to 4

Common Questions: What causes a limit switch to open

Designed specifically for pilot duty applications

McDonnell & Miller 157S-R-M Pump Controller Els PW 17895 allowing a high volume ofThe McDonnell & Miller 157S R M (Part Number 177306) is a heavy duty, float operated low water cut off and pump controller designed for commercial and industrial steam boilers. This unit features an integral water column and alternate tappings to simplify installation on various boiler configurations. The 157S R M is functionally identical to the 172817, utilizing a snap acting SPDT switch that eliminates the need for mercury while providing reliable