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McDonnell Miller Low Water
Cut-offs and Water Feeders |
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Low
Water Cut Off |
Water
Feeders |
Series 63, 64, 764, 67, 69, 150, 157,
764, 42, 93, 94, 193, 194
McDonnell
Miller Low water cut offs, whether snap switch or mercury switch models, provide a reliable method of controlling a boiler feed pump. Mounted at the boiler water line, it starts and stops the pump as the boiler water dictates. Consequently, it holds the boiler water level at the limits recommended by the boiler manufacturer to maintain maximum steaming efficiency.
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Series 101-A, 47, 51, 53, 247, 21, 551, 847,
851, 47-2, 51-2, 53-2, 247-2
McDonnell
Miller Water Feeders open if the boiler's
water line drops to the feeder / cut-off
combination's feeder operating point (which
is very near the bottom of the guage glass),
the feeder will open mechanically and add
water to the boiler. How much water will
enter the boilers depends on several things,
but there will always be enough to keep
boiler operating at a safe minimum
water level. Once it has added the right
amount of water, the feeder closes.
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McDonnell Miller Switches
and Liquid Flow Controls |
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Switches |
Liquid Flow |
No. 2, 5, 7-B, 11
McDonnell Miller is the brains of
the Water Feeders and Low Water Cut
Off. The switch tells the boiler
when to turn on or off depending on
the level of water in the
boiler.
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Series FS4-3, FS4-3T, FS5, FS8-W,
FS1, FS1-W, FS6, FS6-W
The
flow of liquids in pipelines plays an
important role in industry and commerce.
Under most circumstances it is essential to
know whether or not there is a flow in a
pipeline, and to act upon that knowledge.
That is the reason for, and the function of,
McDonnell Miller Flow Switches.
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