Madden diaphragm metering pumps are designed for tough industrial jobs where chemicals must be pumped 24 hours a day, 365 days a year. 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 pumped with volume controlled accuracy.
Repetitive accuracy of +/- 1% over a 10:1 turndown ratio is achieved with the stroke adjustment knob located conveniently on the top of the pump.
The simple mechanically actuated diaphragm design eliminates pesky hydraulic systems and packing glands used in many metering pumps. Large bearings and shafts, continuously lubricated with a bath of oil give many years of reliable service. Precision bronze worm gears and steel worm drive shafts convert motor rpms to linear piston pumping power. Replacing worn parts is fast, simple, with common tools.
Rugged Construction Madden metering pumps are heavy duty industrial grade, using standard industrial 56 frame motors and worm gear reducers to produce reliable pumping power designed to provide many years of reliable service. Heavy duty aluminum gear box and pump body castings, precision machined and bolted assembly. Wetted end parts made from a selection of corrosion resistant materials. Thick Nylon reinforced diaphragms for tough pumping service. Industrial grade 56 frame electrical motors are available to meet any enclosure and power supply requirement.
Madden metering pumps are industrial grade construction, with heavy gearing, shafts and bearings, and industrial grade electric motors. Some of the lower capacity competitors do not use electric motors to drive the diaphragm, using a solenoid instead. The Madden pumps will outlast these consumer grade products by decades. Compared to some competitors hydraulically actuated diaphragm type metering pumps the Madden pumps do not have hydraulics to keep in operation. Madden pumps do not need replacement of hydraulic fluid, seals and components, and the Madden pumps will never leak hydraulic fluid into the industrial process. Madden diaphragm metering pumps are simple in design and construction, requiring minimal maintenance. Repairs are done with common tools.