• Double diaphragm option is available for superior protection from dangerous liquids. When equipped with the proper materials the MF Series pumps are excellent for pumping dangerous liquids such as acids, caustics and solvents. Liquids with suspended solids such as diatomaceous earth and lime slurry can be accurately pumped.
  
• Standard motors are industrial grade 1/4 to ¾ HP 56 frame, foot mounted TEFC. Motors are available for explosion proof, washdown, and mill & chem plant duty, and for 1 or 3 phase, 50 or 60 Hz power.
  
• Tough fabric reinforced rubber diaphragms protect the drive train from the pumped liquid. The short stroke with 3" diameter piston increases diaphragm life by reducing fatigue.
  
• See the Models and Specifications PDF for details of the internal pump construction features

12 simplex models, 5-75 GPH capacity, up to 300 psig. 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. Mechanically activated diaphragm type metering pumps are are simple and rugged in design. The manual output adjustment knob is located conveniently on the top of the pump body. For automatic output control with a 4-20 mA instrument signal several variable speed drive packages of controller and motor are available. The worm gear reducer has integral steel worm drive shaft and a bronze worm gear, continuously splash lubricated with ISO grade 460 worm gear reducer oil for extended gear and bearing life. Standard motors are 56 frame foot mounted, 1,725 rpm, TEFC. Repetitive accuracy is +/- 1%. Simplex, duplex, triplex and quadruplex pumps are available.