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Madden Chemical Metering Pumps: Made to Order – Customized for your Business

Madden metering pumps are made to order. When ordering a pump, we will need to know:

  1. Your desired output/ flow rate
  2. What chemical you’re metering
  3. What type of motor you need
  4. If you are looking for any other accessories for your system

With this information, our engineers can design a pump to best suit your needs as opposed to selling you something out of a catalog. Let’s take a closer look at the options.

Step 1: Desired Flow Rate

Madden can provide a pump to go as low as 0.1 GPH (0.38 L/hr) and as high as 360 GPH (1,362 L/hr). From our literature, you may think that Madden’s minimum output is 1 GPH, but keep in mind that Madden pumps have a 10:1 adjustment knob which allows for manual adjustment of the stroke length of a pump. You may also think the max is 180 GPH, but we can duplex the pumping heads to double the output. Let’s take a closer look.

Madden offers 3 series of pumps which service various flow rates in between 1-360 GPH. There are numerous models in each series.

  • The JN Series: 6 models with maximum outputs ranging from 1-11 GPH *Simplex. Duplex and Triplex also available.
  • The MF Series: 11 models with maximum outputs ranging from 5-75 GPH, *Simplex. Duplex and Multiplex also available.
  • The MH Series: 5 models with maximum outputs ranging from 96-180 GPH, *Simplex. Duplex also available.

*Simplex, Duplex, Triplex, and Multiplex refer to how many wetted ends or pumping heads these models can have. We can put up to four pumping heads on an MF series pump for example, effectively quadrupling the output if one were to be pumping the same liquid via all four heads. Click here to read our previous article about duplex, triplex, and multiplex pumps.

Step 2: Wetted End Materials

Madden has wetted end materials to handle nearly all corrosive liquids, acids and caustics. The options depend on the model of pump that you select; they include 316 Stainless-Steel, PVC, Teflon, Polypropylene, Neoprene, Hypalon, Viton, Ceramic, Hastelloy C, and Alloy 20.

The table pictured below shows which materials are available for which pumps.

Step 3: Motor

At Madden we stock standard 1725 rpm, 56 frame, TEFC, 1/60/115-230 or 3/60/230-460 motors. Because of this, we can usually have a pump out within a couple of days in emergency cases.
But we don’t limit you to these choices. Check out all of the other motor types we provide:
1.    Explosion Proof
2.    Washdown Duty
3.    Mill & Chemical Plant Duty
4.    Inverter Duty
5.    50 Hz

Step 4: Accessories

We offer many accessory components for convenience and further performance for our customers. The next two are some of our more prominent accessories.

Variable Speed/Frequency Drives, Automatic Control: Madden can provide an inverter duty motor with a VFD for automatic pump applications. Both AC and DC variable speed drives are available to suit nearly every application using a 4-20mA signal for pump output control.

DDB double diaphragm: When pumping highly corrosive liquids we strongly recommend this DDB setup. What we do is add a secondary, back up diaphragm to ensure the corrosive liquid will never come in contact with the pump’s interior components. There is a secondary piston and a spacer in between the primary and secondary diaphragms. This spacer allows for leak detection. All in all, this option helps ensure you will only ever need minor repairs or replacements, our pumps are made to last 24/7/365!

What else? Check out the remaining accessories available for your next Madden Pump:

  • Back Pressure Check Valves: required when outlet connections pressure is less than 20 psi to enable pump valves to operate properly for accurate pumping. Sizes range from ¼” to 2”, adjustable Teflon diaphragm with body material to match the pump construction.
  • Relief Valves: Required when outlet line may become closed to prevent over pressure on piping and pump components. Sizes from ¼” to 2”, adjustable, Teflon diaphragm with body material to match the pump construction.
  • Pulsation Dampener: Eliminates pulsing flow and pressure peaking characteristics of piston type pumps. Available in sizes and material to match pump construction.
  • Calibration Cylinder: Seven sizes from 100 mL to 20,000 mL, clear PVC material, used to calibrate pump output at various adjustment knob settings.
  • Leak Detector Switch (pressure type): Type 316 SS, used with type DDB double diaphragm to signal a leak in the primary diaphragm for prevention of damage from corrosive or dangerous liquids.
  • Pump Mounting Base: Heavy steel construction. Available for MF and JN series.
  • Pump Cover: Protects MF and JN series pumps from weather, galvanized steel.

Call Or Email Today

Our mechanically actuated, industrial duty chemical metering pumps are of the highest quality and come with plenty of options to insure consistent and accurate metering. If you’re in need of a chemical metering pump, Madden has you covered. Give us a call 1-800-369-6233 or send us an email [email protected] to discuss your next project.

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