Chemical Feed Systems

Specifying a Madden Chemical Feed System (*VIDEO)


Madden Pump combines a heavy duty tank for mixing and storing chemicals, a Madden diaphragm metering pump to inject the chemical solution, an industrial duty mixer, and suction and relief piping all on one platform to offer you a complete chemical feed system.

Madden has standard pre-engineered systems, and is also capable of building customized systems with equipment and features specified by the user.

The following is a list of main features and their sub-features:

  • Tanks
    • Durable polyethylene tanks are standard.
    • Polypropylene and stainless steel tanks are options
    • Hinged lids and piping connections are included.
    • Sizes from 30 to 110 gallon capacity are standard (optional sizes available to meet any storage capacity requirements).
  • Pumps
    • Madden diaphragm metering pumps are used to inject chemicals into the plant’s operating system.
    • Madden pumps are industrial grade, heavy duty construction, with adjustable output control. Output as low as 1 GPH and as high as 360 GPH.
    • See our P04 Pump Brochure for more details on the 3 different series of Madden metering pumps (link)
  • Mixers
    • Madden has high speed, medium speed, slow speed, and variable speed mixers available for your chemical mixing needs.
    • Blend, suspend, dissolve, and disperse nearly any solution with these industrial agitators.
    • Stainless steel shafts and 3 blade marine type propellers are standard. Turbines up to 24 inches in diameter also available.
    • See our Madden Mixer brochure and blogs for more details (brochure), (blog 1), (blog 2)
  • Platforms
    • These are welded steel construction, designed to support a filled tank.
    • Serve as mounting for the mixer, pump, and piping.
    • Standard platforms raise tank 16” from the floor to enable easy access by the operator.
    • Custom platforms can be made for multiple tanks and pumps.
    • Standard finish is acrylic enamel, with highly corrosion resistant epoxy primer with polyurethane top coat as an option.

This concludes our “standard line-up” of chemical feed systems and you can glance through the brochure here. Madden would like to emphasize that you should view this as a guide line for what we can offer you. We are very quick to respond to inquiries, reach out to us with any questions or alternatives to these systems you’d like to know about.

Common Custom Specifications

We have noticed an increase in inquiries for our feed systems when it comes to “one off” custom applications. It is common for us to receive a call that goes something like, “Hey, I was looking at your feed systems and I like the idea of getting something similar to a model TE501 but…

  • “we need a stainless steel tank”
  • “we need a larger pump”
  • “we need it to be on two separate platforms”
  • “we want to double up everything, and to have it all on one skid”

And so on and so on. Sometimes we’re even receiving inquiries asking, “I need a system put together with no tank and mixer, but rather 4 pumps working together via a switch board”.

“Can you do this?” – Yes we can!


This is a 1:30 minute video giving a brief overview of a chemical feed system of ours. You may notice this system in the video won’t technically be found in our literature. This is because the customer needed us to jump from a JN series pump to an MF series pump, as well as find them a 30 gallon stainless steel tank. Done and Done!



This video shows how our simple and clean standard feed system design can be tweaked and reengineered to perfectly fit your application.

If you have seen anything here that is close to a perfect fit for serving an application of yours, but it just needs some slight variations, give us a call (574) 295-4292 and we’ll see what we can do.

Chemical Feed Systems

Madden Chemical Feed Systems

Generic/Standard chemical feed system for boiler water treatment by Madden Pump
06/13/2018… Madden Pump offers a standard boiler water treatment pumping system for your new or existing boiler room. Use our ready made specifications on your next project for the most efficient and economical way to fulfill your chemical feed system needs.

Industrial Mixers

Madden Mixers

  • Madden Mixers: Available Features by Madden Pump
    02/22/2016… Madden Pump offers 3 standard heavy duty mixer lines. These agitators have many features and options available for you to fine tune your next industrial mixer.
  • Madden Pump’s Industrial Mixers by Madden Pump
    02/01/2016… Madden industrial mixers are designed and built to be durable and provide trouble fee service in a wide variety of blending and mixing applications. Click the blog to learn more on what Madden has to offer in heavy duty, industrial mixers.
Diaphragm Type Metering Pumps

Chemical Metering Pumps Well Suited for Agricultural Applications Like Nitrogen Injection into Center Pivot Irrigation Systems

Madden Pump’s chemical metering pumps have been around since the 1950’s and the design continues to withstand the test of time. “If it ain’t broke, don’t fix it”. We have found Farmers seem to appreciate this phrase in particular, as we continue to service their 60+ year old metering pumps with replacement valve parts to this day.

Diaphragm Type Metering Pumps

What is Chemical Metering and When is it Needed?

Chemical metering is the act of adding chemicals into another process at a repeatable and consistent rate. The consistent and repeatable aspect is what distinguishes this process from any other type of fluid transfer process; there are hundreds of applications requiring the transfer of liquid from point A to B, none require the consistency and accuracy at the level chemical metering does.

Diaphragm Type Metering Pumps

Chemical Metering Pumps – What exactly does Madden’s ‘Proven, Rugged Quality’ mean?

For several years now Madden Pump has added the phrase Proven, Rugged Quality to our literature, website, and other information mediums. For 65 years now, Madden products have been described this way by employees, distributors, rep’s, and end users alike. It has always been the Madden mantra to manufacture industrial chemical metering pumps and boiler blowdown equipment with quality and simplicity in mind.

Diaphragm Type Metering Pumps

Readily Available Chemical Metering Pumps, Manufactured and Stocked in the heartland of the U.S.A.

Madden Pump is located in Elkhart, Indiana and has manufactured their rugged, dependable line of chemical metering pumps for over 65 years now. We have a variety of wetted end materials that allow our pumps to be chemically compatible with any liquid you need to dose. All parts are stocked and can ship out same day when spares are needed and it also allows us to build emergency, rush pumps in as little as 2 days. Madden Pump may not have a vast variety of chemical metering pumps designs like some of our large competitors, but when it comes to lead times and responsive service Madden is second to none.

Diaphragm Type Metering Pumps

Understanding when it’s best to use a Diaphragm metering pump vs. other chemical pumps

When you have an application that requires you to meter liquids into other processes at a finite and accurate rate, a metering pump is well suited for this. Even more specifically, when you need that finite amount of liquid to be dosed at a consistent, repeatable rate, diaphragm metering pumps are perfect. For mechanically actuated diaphragm metering pumps, this usually means the operating pressure is less than 500 PSI, for hydraulically actuated diaphragm metering pumps the pressures can go much higher, often up to 1,000-2,000 PSI.

Diaphragm Type Metering Pumps

Madden Metering Pump continues to thrive 50 years of use and a negligent shipment back to the factory

To start off 2018, we had an interesting repair pump situation arise. A Madden metering pump sent back in for repair that was over 54 years old. This diaphragm metering pump has been in operation since October 16, 1964. The majority of its time has been spent dosing diatomaceous earth slurry for the drinking water at Wells College in Aurora, NY. It just 
recently got sent in for repair to semi retire as the backup pump.

Diaphragm Type Metering Pumps

Chemical pumps designed for pumping polymers and alums

Polymers and alums (or aluminum sulfates) are often used in wastewater treatment processes. These solutions act as flocculants and coagulants to help separate impurities from waste water.

Flocculating, or coagulating, are similar processes that treat wastewater by helping bring together dissolved and suspended solids and other impurities in water to form larger aggregates for easy separation. After the aggregates form, they will settle to the bottom for easy removal by either scraping the formed “scum” away or utilizing an inline filter.

Diaphragm Type Metering Pumps

How to automate your chemical transportation processes using chemical metering pumps, flow meters, and batch controllers

Madden Pump has noticed an increase in inquiries from end users looking to automate chemical liquid transferring applications, to a simple, but automated system.

The premise of many of these applications involves an employee having to keep a bucket under a dispenser to then either transport the chemical from that station to the next process or simply package it for shipping.

Diaphragm Type Metering Pumps

Chemical metering pumps that can be controlled automatically, remotely, and can self detect leaks!

When Madden personnel look into design changes and improvements with our metering pumps, our priority is always first focused on characteristics and features that promote 24/7/365 chemical metering. Our goal is to provide the most rugged, easy to operate chemical metering pump on the market. Set it, forget it, and then trust it: the Madden metering 

pump will be a workhorse for your chemical injection application with little to no down time in comparison to most of our competitors.

Diaphragm Type Metering Pumps

What can cause a positive displacement type chemical metering pump to overheat?

!!(Author’s Note: Other than a motor malfunction, or an application flaw that causes the pump to begin to dead head, your Madden metering pump will not overheat; due to operating in an oil bath, and the bench testing every chemical injection pump at our facility for smooth, leak free operation, Madden’s robust design is made to never need repairs of any internal parts on our metering pumps. Only occasional wetted end repairs are ever required.

Diaphragm Type Metering Pumps

What accessories are needed with chemical metering pumps and what purpose do they serve?

Positive displacement chemical metering pump designs are the best available for injecting chemicals into processes where such dosing is needed. There are many additional components that can enhance the performance of your chemical dosing application. This article will walk through the more popular components found in chemical metering applications and mention the purpose each of them serve.

Diaphragm Type Metering Pumps

Preventative measures you can take to ensure a long service life for your chemical metering pump as well as a safe pumping enviornment

In the case of a chemical metering pump, being offline could mean allowing untreated liquids to continue along in your process, ruining an entire batch.

Dosing pumps malfunctioning or needing repairs is always a nuisance, but depending on the application, it can be more than a nuisance, it can be a critical hit to your business with every minute it is offline.

Diaphragm Type Metering Pumps

Pumping acids for water quality control in wastewater and general water treatment applications

The reasons for clean and neutral water are vast, stemming from human health to piping and equipment durability. Chemicals like Sulfuric Acid, Phosphoric Acid, Nitric Acid, among others are all used to help maintain PH levels in water. This article will go over why PH balance in water treatment is important and the needed safety measures in your pump design for handling the chemicals that are commonly used to treat water.

Diaphragm Type Metering Pumps

Quickest and easiest way to get a complete packaged chemical pumping system, skidded and ready to go upon arrival.

When faced with a new chemical injection application for an industrial, municipal, or commercial process, often times the planning around procuring and installing all the components you need becomes a cumbersome and time consuming event. There are so many accessories you can add to a chemical metering pump to help with performance, and plenty of brands and suppliers for each part as well.

Diaphragm Type Metering Pumps

Turning Manual Pumping Applications into Automatic Batching Systems (Video)

Do you currently have a pumping process that requires workers to monitor and/or wait on the process to start and finish? Madden Pump’s new automated batching system could be just the thing for you.

Paying someone to stand around and wait for a certain amount of chemical, oil, or any other liquid to be dosed into a system is costly and inefficient. Employees can be spending their time elsewhere helping the business make profits. Turning your manual pumping system into an automatic pumping, or batching, system may be easier and less costly than you think.

Diaphragm Type Metering Pumps

Not so obvious things to keep in mind to help your Chemical Metering Pump application run smoothly 24/7/365

When purchasing a chemical metering pump most are concerned with the features of the pump, like, the flow rate, pressure rating, available materials, life expectancy, and so on. Not so many people consciously stop to think about all of the little, unobvious things that can cause a chemical injection pump to underperform. And you probably shouldn’t, but that’s why Madden Pump has put together this article.

Diaphragm Type Metering Pumps

Where to Buy Chemical Metering Pumps: Don’t Dismiss Local Distributors Just Yet

With the continuing progression of the internet and online sales, it can be easy to forget about looking into local distribution for your chemical metering pump needs. There are certainly times where the convenience of buying direct from the manufacturer is appealing, repeat purchases would be an example, but as we are constantly reminded as a manufacturer trying to sell nationwide and occasionally to the global market, nothing beats face to face sales.

Diaphragm Type Metering Pumps

What is the Best Type of Pump for Chemical Dosing?

There are many pumps available on the market for injecting chemicals into a process. So what makes one better than the other? This can be hard to break down, especially when you’re not only comparing brands to one another but also comparing different pump types. Gear pumps, piston pumps, peristaltic pumps, and diaphragm type pumps are all available pumps to consider when injecting chemicals.

Diaphragm Type Metering Pumps

Why we choose to be a Made in the USA chemical pump manufacturer

The standard reasons for having practices that allow us to claim our products as Made in the USA do apply to our decision to go this route. We are proud of the country we live in, and we want to support other 100% USA based companies like ourselves. When a customer purchases a chemical metering pump, sample cooler, or boiler blowdown equipment from us, they are helping support Paula, Aaron, Lori, Michelle, Johnny, Ed, Stu, Gary and others at Madden, all living in Elkhart Indiana. Purchases support Madden and our families.

Diaphragm Type Metering Pumps

Automatically Changing a Chemical Metering Pump’s Output using VFD’s

This blog will go over the simplest ways to change the flow rate on a Madden metering pump. To start, all Madden chemical metering pumps are designed with a manual stroke length adjustment built right into the pump. This allows for a very linear turndown of the pump’s output or flowrate and it is quite simple. A knob and dial scale on top of the pump allow you to turn down the ouput at a 10:1 ratio of your pump model’s max capacity.

Diaphragm Type Metering Pumps

(*VIDEO) How the Manual Flow Rate Adjustment Works on a Madden Pump

Applications that call for metering, dosing, or the injecting of chemicals also call for accuracy no matter the conditions or settings the pump may face. The need for accuracy in these applications is simply a given, and there are two reasons accuracy goes hand in hand with injecting chemicals. The first reason is that precise amounts of a chemical could be needed to achieve the goal of the application.

Diaphragm Type Metering Pumps

Cost Effective Chemical Injection Pumps

This blog is intended to explain our stance for claiming to be one of, if not the most, cost effective chemical metering pump on the market. Merriam-Webster has two definitions of “cost-effective” they are as follows:

Simple Definition: Producing good results without costing a lot of money.
Full Definition: Economical in terms of tangible benefits produced by money spent.So let’s look at how Madden metering pumps can be the best bang for your buck.

Diaphragm Type Metering Pumps

(*VIDEO) How to make wetted end repairs on a Madden Chemical Metering Pump

This blog and video will show how easily it is to replace wearable parts on our heavy duty chemical metering pumps. Madden Pump designs industrial grade chemical metering pumps intended for 24/7/365 use. All three series of our metering pumps are made to be an investment. They are not intended to be throwaway pumps, we want our chemical metering pumps to dose chemicals in your application for a very long time.

Diaphragm Type Metering Pumps

What all can affect flow rates in Metering Pumps?

High quality metering pumps are precise when they arrive from the factory. Pressures, temperatures, viscosities, and other factors will not affect the ability of a quality metering pump to be precise. In other words, these factors will not affect the pump’s ability to produce the same output repeatedly for a long time. A quality metering pump’s output should not fluctuate while in operation.

Diaphragm Type Metering Pumps

(*VIDEO) How to replace the MP048 flexible shaft in a Madden MF or MH series diaphragm metering pump

This article and video will walk you through the step by step process of replacing the flexible shaft in a Madden MF series diaphragm metering pump. The process is the exact same for the MH series pumps.

Replacing a flexible shaft is a quick and simple process, as are all repairs on a Madden pump. Madden Pump’s diaphragm metering pumps are not “throw away” pumps.

Diaphragm Type Metering Pumps

The Difference Between Mechanically Actuated Diaphragm Metering Pumps and Hydraulically Actuated Diaphragm Metering Pumps

This blog is intended to explain the difference between mechanically actuated diaphragm metering pumps and hydraulically actuated metering pumps; after the ground work has been laid, we will discuss the advantages of Madden type DDB double diaphragm construction and actuation, in comparison to a hydraulic metering pump’s construction and actuation.

Diaphragm Type Metering Pumps

Madden Metering Pumps – Pumping Sodium Hydroxide (Caustic Soda)

Sodium hydroxide, often called caustic soda or lye, is a common chemical handled by Madden metering pumps. With corrosive substances like sodium hydroxide, it is important to find a chemical metering pump with materials available that can come into contact with this chemical, and last for a considerable amount of time. Any leaks or damage that occur in a pump which is processing a chemical like this could have disastrous consequences to the things surrounding it.

Diaphragm Type Metering Pumps

Madden Metering Pumps – Duplex, Triplex, and Multiplex Pump Options Explained (*Video)

Among the many variations and customizable features allowable in a Madden diaphragm metering pump, is the ability to duplex (double), triplex (triple), and multiplex (quadruple) the pumping heads.

A quick explanation:

When you hear words like this in the pumping world, essentially what we’re talking about is providing a mini pumping system, via the pump itself. In other words, there is 1 motor, 1 worm gear reducer, and 1 drive shaft, driving 2-4 pumping heads.

Industrial Mixers

Madden Mixers: Available Features

Madden Pump, Inc. offers three different lines of heavy duty, industrial mixers at an extremely competitive price. These mixers, also known as agitators, serve a vast array of industrial applications across the world; the mixing process and applications include, but are not limited to:

Liquid Blending
Solids Suspension
Gas Dispersion
Dissolving Solids

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