McDonnell & Miller 150S-HD Controller

Combination Low Water Cut-Off and Pump Controller with Snap Acting SPDT Switch Head Mechanism Only (Part Number 173003)

McDonnell & Miller 150S-HD Controller – Head Mechanism Only (Part #173003) | Low Water Cut-Off & Pump Controller

The McDonnell & Miller 150S-HD (173003) is a combination low water cut-off and pump controller designed specifically for steam boiler applications with a maximum pressure of up to 150 PSI. This listing is for the head mechanism only, offering a direct OEM replacement for commercial and industrial boiler systems that require reliable and precise water level management.

Manufactured by Xylem-McDonnell & Miller, this controller features a snap-acting SPDT switch, delivering dependable control for both pump operation and low water safety shutoff functions. Engineered for high-temperature service, the unit includes corrosion-resistant Monel bellows and is ideal for demanding boiler environments.

🔧 Key Features:

• Model: 150S-HD

• Part Number: 173003

• Type: Head Mechanism Only – Combination Low Water Cut-Off & Pump Controller

• Switch Type: Snap-Acting SPDT

• Applications: Commercial and Industrial Low/High Pressure Steam Boilers

• Max Pressure: 150 PSI (10.5 kg/cm²)

• Pump Control: 1 Single Pole, Single Throw (SPST) Switch

• Low Water Cut-Off & Alarm: 1 Single Pole, Double Throw (SPDT) Switch

• Material: Monel bellows for corrosion resistance

• Reliable OEM Replacement – McDonnell & Miller quality

✅ Ideal For:

• Steam boiler systems in commercial buildings

• Industrial heating applications

• Replacement of worn or damaged controller head mechanisms

• High-temperature, high-pressure boiler environments

Ensure the safety and efficiency of your boiler system with the McDonnell & Miller 150S-HD – engineered for precision, built to last.

This item is not eligible for free shipping.