Description
McDonnell & Miller 173702 157S-A High Pressure Level Control
Float Type Combo Low Water Cut-Off & Pump Controller with Water Column & Alternate Tappings (Steam Boilers)
Product Overview
Built for commercial and industrial steam boilers, the McDonnell & Miller 157S-A delivers reliable low water cut-off and pump control in a rugged float-style design. Featuring corrosion-resistant Monel bellows and an integral water column, it’s engineered for high-pressure service up to 150 psi.
Key Features:
-
Automatic reset for continuous, safe operation
-
Snap action switches for high-temperature steam environments
-
1 SPST switch for pump control
-
1 SPDT switch for low water cut-off and alarm activation
-
Threaded 1-1/4" NPT connections
-
Includes alternate tapping options for flexible installation
Optional Features:
-
Manual reset available
-
Additional SPST or SPDT switches
-
Float block and BSPT thread options
Technical Specifications
| Feature | Specification |
|---|---|
| Max Pressure | 150 psi (10.5 kg/cm²) |
| Application | Steam Boilers |
| Reset Type | Automatic |
| Switch Types | SPST (Pump Control), SPDT (LWCO & Alarm) |
| Connection Type | Threaded 1-1/4" NPT |
| Pilot Duty Rating | 345 VA |
| Electrical Ratings (AFL) | 7.4 A @ 120 VAC, 3.7 A @ 240 VAC |
| Electrical Ratings (ALR) | 44.4 A @ 120 VAC, 22.2 A @ 240 VAC |
| Dimensions (L×W×D) | 16" × 5.88" × 13.38" |
| Features | Water Column, Alternate Tappings, Snap Action Switches |
Ensure boiler safety and efficient water level management with this high-quality McDonnell & Miller combo controller — ideal for demanding steam boiler systems.
