163200 Model 93-7B-HD McDonnell & Miller Head Mechanism

The McDonnell & Miller #93-7B-HD Head Mechanism

Datasheet

Installation Guide

Series 93
Low Water Cut-Off/Pump Controller

• For commercial and industrial low or high pressure
steam boilers
• Maintains consistent water level regardless of pressure
• For boilers of any steaming capacity
• No. 5 Switch included
• Magnetic repulsion eliminates need for bellows
• Optional features
–Manual reset
• 7B switch (135ohm proportional control signal) to
maintain constant boiler water level
• 1″ NPT connections
• Maximum pressure 150 psi (10.5 kg/cm2)