Overview
The ITT McDonnell & Miller 61-HD 205210 is a time-tested mechanical low water cut-off control for steam boiler systems. This device automatically shuts off fuel supply when water level drops below safe operating levels, preventing damage to boiler equipment and ensuring safe operation across residential and commercial applications.
Key Features
- Automatic Reset: Automatically resets when water level returns to normal operating range
- Mechanical Design: Reliable float-operated mechanism with no electronic components
- Adjustable BX Outlet: Flexible connection option simplifies field installation
- Wide Application Range: Suitable for boilers of any steam capacity in residential and commercial settings
- 1″ NPT Female Connections: Standard industry threading for straightforward integration
Technical Specifications
- Model: 61-HD / Series 61
- Part Number: 205210
- Connection Type: 1″ NPT female threaded
- Maximum Pressure Rating: 20 psi
- Control Type: Mechanical low water cut-off
- Reset Function: Automatic
- Applications: Steam boiler systems
- Manufacturer: ITT / McDonnell & Miller (Xylem)
Typical Applications
The 61-HD low water cut-off is commonly used in:
- Residential steam heating systems
- Commercial and light industrial steam boilers
- Hot water heating boilers (hydronic systems)
- Process steam applications requiring automatic water level protection
- Systems requiring compliance with ASME boiler safety standards
Compatibility & Replacements
Compatible With
- Low-pressure steam boilers (residential and commercial)
- Hot water heating systems (hydronic applications)
- Boiler systems rated up to 20 psi
- Standard 1″ NPT female threaded boiler connections
Replaces / Drop-In Replacement For
- McDonnell & Miller Series 61 (model 140100)
- Other equivalent McDonnell & Miller low water cut-off controls in the 61 series
Works With
- Any steam boiler system with 1″ NPT female inlet connection
- Boiler fuel control systems (gas, oil, electric)
- Standard boiler safety circuit architecture
- ASME Code Section I and Section IV boiler systems
