Description
The Xylem-McDonnell & Miller 61-HD is a reliable mechanical low water cut off (LWCO) designed specifically for steam boiler applications. Sold as the head mechanism only (Part Number 140300), this unit provides essential boiler protection by shutting down the burner whenever water drops below a safe operating level — helping to prevent costly boiler damage and dangerous dry-fire conditions.
Key Features
- Mechanical low water cut off engineered for steam boiler systems
- 20 PSI maximum steam pressure rating
- Head mechanism only — mounts to existing McDonnell & Miller 61 series body
- Part Number: 140300
- Proven McDonnell & Miller design trusted by HVAC professionals for decades
- Automatic burner shut-off when water level falls below safe threshold
- Durable construction suited for residential and light commercial steam boiler installations
Product Specifications
- Brand: Xylem-McDonnell & Miller
- Model: 61-HD
- Part Number: 140300
- Maximum Steam Pressure: 20 PSI
- Type: Mechanical Low Water Cut Off
- Configuration: Head Mechanism Only
- Application: Steam Boilers
Application
The 61-HD head mechanism is ideal for replacement or upgrade of existing 61 series LWCO assemblies on steam boilers. As a head-only unit, it allows technicians to replace the control mechanism without disturbing the boiler piping, saving time and labor on service calls. Compatible with standard McDonnell & Miller 61 series bodies, this part is a go-to solution for steam boiler maintenance and safety compliance.
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