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Chemical Metering Pumps

Chemical Metering Pumps - Three Pump Series

JN10-A Pump



 
MF Series Pump
MH Series Pump



 

Madden diaphragm chemical metering pumps are designed for tough jobs where chemicals must be accurately 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.

Precise

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.

Why use a Madden chemical metering pump?

… It will be the work horse of your chemical metering system.
Chemical metering pumps
Chemical Metering Pumps


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.

Safety Features

Type DDB Double Diaphragm

Often times when chemical metering applications arise, the chemical needing to be metered is a corrosive and dangerous chemical. These chemicals are not only harmful to human skin, but they can be extremely corrosive to metals, rubbers, and other materials found in the plant. When dealing with corrosive chemicals like this, parts fatiguing on the pump is inevitable. And a potential leak or rupture in the pumping system can have dangerous and costly consequences. Madden's Type DDB Double Diaphragm construction is a feature meant to minimize/eliminate the dangers and potential losses that result from a rupture or leak in the system. This is achieved by adding safety features to the pump to ensure the operator that the corrosive liquid will not enter the interior of the pump or leak on the shop floor. And it's dry mechanical design means never having to worry about hydraulic barrier fluids
JN series single primary diaphragm construction JN series type DDB double diaphragm construction
Standard, single diaphragm design Type DDB double diaphragm design
 entering the application in the case of pharmaceutical and food applications.

Construction: The DDB double diaphragm construction design adds a spacer and another, backup/secondary diaphragm to the chemical pump’s wetted end to ensure the corrosive chemical, like caustic soda, never reaches inside and damages the pump’s interior components. This is one big reason why, when properly maintained, there are Madden chemical metering pumps out there that have lasted for over 25 years with only minor wetted end parts needing to be replaced.

The picture above is of a Madden JN series pump with a standard, single primary diaphragm design, and a Madden JN series type DDB double diaphragm design.

Leak Detecting Pressure Switch

1/4 ince Leak detecting pressure switch
Another great feature that comes with the type DDB double diaphragm is the ability to place a pressure switch in the spacer between diaphragms. There is a 1/4” NPT hole in the spacer that allows for a pressure switch to be installed. The pressure switch should be set to the lowest level. Under normal operating conditions the pressure inside this spacer is the same as the ambient air surrounding it. So if the pressure switch is set to its lowest setting and there is any kind of rupture in the pump’s diaphragm, the smallest amount of pressure that results will set off the pressure switch. From there you can either wire it to an alarm or wire it to shut of the motor; making absolutely certain harsh chemicals like sodium hydroxide will never touch the shop floor or anything else near the pump.

Madden Metering Pump Selection Guide

For the cleanest and easiest way to inquire about a Madden metering pump, download this fillable pump selection guide, fill it out, and upload it through the RFQ section of our website. We take pride in responding promptly!
 
Metering Pump Selection Guide

Chemical Metering Pumps - Three Pump Series - Made to Order

Madden Manufacturing doesn’t just manufacture chemical metering pumps. We also put together entire chemical metering systems.
Made to order Chemical Metering Pumps Made to order Chemical Metering Pumps
Example 1 of a made to order system Example 2 of a made to order system

Click here to contact us to let us know what your requirements are and we'll see what we can do!
 
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Automate Your Application

With the help of local experts at JK Industrial Controls, Madden now has the ability to completely automate your pumping applications. Take a look at our Automation and Controls webpage or fill out the contact form below to learn more!

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