Madden chemical pumps are designed for demanding industrial jobs where chemicals must be pumped all day, every day. 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 a convenient stroke adjustment knob located on the top of the pump.
The mechanically actuated diaphragm system eliminates annoying hydraulic systems and packing glands used in many chemical pumps. Large bearings and shafts, continuously lubricated with a bath of oil give 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 fast and simple, with common tools.
Chemical pumps by Madden 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 dependable service. Rugged 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 need.
The Madden diaphragm type chemical pumps are positive displacement chemical pumps that allow the operator to adjust the displacement of the pump which changes the output rate. Madden pumps are “lost motion” type pumps which use a piston to mechanically move a rubber diaphragm that is the barrier separating the liquid from the inner workings of the pump. An electric motor drives a worm gear speed reducer that in turn turns a shaft with an eccentric installed on the shaft. As the eccentric moves forward the piston is pushed forward, along with the diaphragm, and the liquid that is in the wetted end of the pump is pushed out through the discharge check valve and into the piping going to the industrial process. As the eccentric continues to rotate through a 360 degree cycle it will eventually push the piston rod rearward, which pulls the diaphragm rearward. That rearward action creates a vacuum in the wetted end of the pump resulting in the chemical liquid being sucked into the wetted end through the suction side check valve.