McDonnell & Miller 194-A-7B Controller 30067439-890 This valve body is designed

This valve body is designed to work with the standard MKC-2 solenoid coil (sold separately)

it typically requires a small pressure differential to function correctly

it prevents nuisance shutdowns and short-cycling when entering a heating cycle in low ambient temperatures

Technicians should check for continuity across the terminals when the switch is cool

replacing 56W68

McDonnell & Miller 194-A-7B Controller 30067439-890 This valve body is designedThe McDonnell & Miller 194 A 7B (Part Number 167100) is a heavy duty combination low water cut off and pump controller engineered for commercial and industrial steam boiler applications. Designed to handle a maximum pressure of 250 PSI, this unit integrates a high performance potentiometer switch to provide a proportional 135 ohm signal, ensuring a constant water level is maintained regardless of varying steaming rates. As a veteran grade float