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Featuring a DPST (Double-Pole Single-Throw) switch mechanism
the nitrile (NBR) seals provide a tight shut-off and prevent internal leakage
This model is commonly utilized as a panel mount pneumatic gauge in control cabinets to monitor various parameters across the HVAC pneumatic loop
high-cycling component that stands up to the demands of air-cooled condenser and compressor management
McDonnell & Miller 157S-R-M Pump Controller 30067439-890 Featuring a DPST (Double-Pole Single-Throw)The 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
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