Description
The McDonnell & Miller 64B (143800) is a mechanical low water cut-off for steam and hot water boilers. Its float-operated switch responds to a falling boiler water level to interrupt the burner control circuit.
- Maximum boiler pressure: 50 psi
- For steam and hot water boiler applications
- Use with a TC-4 Test-N-Check valve arrangement on hot water systems
- Float block configuration
- Two switch circuits for low-water and alarm/feeder functions
