Chemical Metering Pumps - Three Pump Series
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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 rpm's 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 |
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 ensure the results are within the limits of the specifications for the process.
Safety Features
Type DDB Double Diaphragm
Madden's Type DDB Double Diaphragm construction is a feature in our chemical metering pumps meant to minimize/eliminate the dangers and potential losses that result from a rupture or leak in the pump system. When chemical metering applications arise for a corrosive and dangerous chemical they are not only harmful to human skin, 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 is an added safety feature on the pump to ensure the operator that the corrosive liquid will not enter the interior of the pump or leak on the shop floor. The DDB’s dry mechanical design means never having to worry about hydraulic barrier fluids entering the application in the case of pharmaceutical and food applications. |
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| Standard, single diaphragm design | Type DDB double diaphragm design |
Our chemical metering pump's double diaphragm construction
The DDB double diaphragm construction design adds a spacer and another, backup/secondary diaphragm to the chemical metering pump’s wetted end to ensure the corrosive chemical, like caustic soda, never reaches inside and damages the pump’s interior components. This added feature is one of the reasons there are Madden chemical metering pumps still in service after 25 years of operation. The Type DDB double diaphragm is just another way Madden ensures their product is focused on simple, rugged quality.The pictures to the right show Madden's JN series pump with a standard, single primary diaphragm design, and a JN series type DDB double diaphragm design.
Metering pump leak detecting pressure switch
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Under normal operating conditions the pressure inside this spacer is the same as the ambient air surrounding it. With that being said the pressure switch should be set to the lowest pressure setting so that if any kind of rupture occurs in the pump’s primary diaphragm, the smallest amount of pressure build up that results will set off the pressure switch. From that point you can either wire it to an alarm or wire it to shut off the motor; making absolutely certain harsh chemicals such as 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 chemical metering pump, download the pump selection guide, complete the form and upload it in the RFQ section of our website. We take pride in responding promptly! |
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. |
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| 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!