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McDonnell & Miller General Catalogue Industrial Controls

McDonnell & Miller Series 47 & 47-2 Combination Mechanical Water Feeder / Low Water Cut-Offs

• For steam and hot water boilers with cold water feed
• Continuous maintenance of minimum safe water level, independent of electrical service
• Proportional feed action
• Quick hook-up fittings provided
• Quick-change replaceable cartridge valve and strainer
• Optional features
– No. 2 switch
– Manual reset
• Model 47 can be field upgraded with a No. 2 switch to
add low water cut-off function
• Maximum water supply pressure 150 psi (10.5 kg/cm2)
• Maximum inlet water temperature 120˚F (49˚C)
• Maximum boiler pressure 25 psi (1.8 kg/cm2)

The McDonnell & Miller Series 47 and 47-2 provide continuous protection against a low water condition. Furthermore it satisfies pump control needs for commercial and industrial steam boilers.

If you need a different model other than those listed, please contact us at

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