Chemical Metering Pumps

MF Series Diaphragm Metering Pumps
JN Series Diaphragm Metering Pumps
MH Series Diaphragm Metering Pumps

Chemical Metering Pumps - Three Pump Series

  1. JN Series: 6 models from 1 to 11 GPH (4-42 L/hr), simplex, duplex and triplex chemical metering pumps available.
  2. MF Series: 11 models from 5 to 90 GPH (19-340 L/hr), ), simplex, duplex, triplex and quadruplex chemical metering pumps available.
  3. MH Series: 5 models from 96 to 180 GPH (363-681 L/hr), ), simplex and duplex chemical metering pumps available.

Chemical Metering PumpsMadden diaphragm chemical metering pumps are designed for tough jobs where chemicals must be pumped all day long, year round. Engineered materials are used for the wetted end to pump virtually any chemical, from acids to caustics. Even viscous liquids and suspended solids can be metered and pumped with precise accuracy.


Repeatable accuracy of +/- 1% over a 10:1 turndown ratio is maintained with the stroke adjustment control located conveniently on the top of the chemical metering pump.

Long Life, Low Upkeep

The simple mechanically actuated diaphragm design eliminates irritating hydraulic systems and packing glands used in many chemical metering pumps. Large bearings and shafts, continuously lubricated with a bath of oil give many years of dependable service. Precision bronze worm gears and steel worm drive shafts convert motor rpms to linear piston pumping power. Replacing worn parts is quick and easy, and accomplished with common tools.

Chemical metering pumps by Madden are heavy duty industrial grade, using standard industrial 56 frame motors and worm gear reducers to produce reliable chemical pumping power designed to provide years of dependable service. Features include...

  • Heavy duty aluminum gear box and pump body castings
  • Precision machined and bolted assembly
  • Wetted end parts made from a selection of corrosion resistant material.
  • Thick Nylon reinforced diaphragms for tough pumping service.
  • Industrial grade 56 frame electrical motors are available to meet any enclosure and power supply requirement.

Chemical Metering pumps - Four pump seriesWhy use a chemical metering pump?

Chemicals are added to many processes in industrial plants to produce a desired outcome, such as changing the pH of water. Adding too much of the chemical will waste money and it could also reduce the desired outcome that was required in the first place. A chemical metering pump is designed to enable the operator to control the rate of chemical addition to make sure the results are within the limits of the specifications for the process.


Chemical Metering Pumps - Three Pump Series - Made to Order

Madden Manufacturing doesn’t just manufacture chemical metering pumps. We also put together entire pumping systems.

Below are just a couple examples of different systems where Madden pumps have been used. Let us know your requirements and we’ll see what we can do.

Custom feed system Custom feed system made produced Madden Pumps



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