McDonnell & Miller model number 61 is a float-operated low water cut-off for steam boilers. This control features an automatic reset with dual 120 volt switches for low water cut-off and alarm or electric water feeders. Its maximum pressure is 20 psi and has a tapped 1″ FIP connection for equalizing pipes. Blow down valve required.
Replacement head mechanism with standard number 7B switch for number 94 and 194 controls. Head mechanisms include everything less the bowl or float chamber. Allows for quick and easy replacement by merely removing the bolts on then float chamber and remove & replace new unit, no need to disrupt and piping.
McDonnell & Miller model number 157S-RL is a combination float-operated low water cut-off and pump controller for steam boilers with an integral water column. The controller has 1/2″ NPT tappings for gauge glass and tri-cocks. This control features an automatic reset with two 120 volt bi-metal snap switches. One switch is single pole, single throw for pump control. The other is single pole, double throw for low water cut-off and alarm actuation. Its maximum pressure is 150 psi and it has an alternative tapped 1-1/4″ FIP connection.