Solid-body, plastic AODD pumps offer reliable corrosive-fluid handling.
by Bernd Reitemeyer

Solid PE also delivers better sealing, higher static weight, smoother operation and better torque retention than other popular materials of construction. For specific applications, the plastic AODD pumps can also be constructed of PE, PE conductive, polytetrafluoroethylene (PTFE) and PTFE conductive. All the pump’s cylinder valves are constructed of PTFE. The diaphragms may be ethylene propylene diene monomer (EPDM), PTFE/EPDM and nitrile rubber (NBR). The ball valves may be made of EPDM, PTFE, NBR and stainless steel.

Every housing part on the plastic AODD pump is tightened to each other by housing bolts. However, instead of single bolts that press punctually against the housing, all the bolts are tightened against a diaphragm-sized ring on each side of the pump. This results in a more even spreading of the housing-bolt force and an increase in permissible bolt torque, which enhances safety and reliability. An optimized flow pattern reduces the pump’s flow resistance, which results in increased efficiency and lower air consumption.

Other features found in the plastic AODD pumps include:

The flux-fluid manufacturer’s state-of-the-art engineering department is tasked with meeting the specific needs of its end users who need reliable flux-fluid systems that overcome the fluid-handling challenges of the pretreatment of raw steel.
  • A maintenance- and lubrication-free air-control system, which ensures accurate reversal of the main piston
  • Optimized flow path for increased energy efficiency
  • Internal piston diaphragm technology
  • Integral dampeners for constant flow with no need for additional piping
  • ATEX conformity for PE conductive and PTFE conductive models
  • Variable port configurations
  • No drives, rotating parts or shaft seals
  • Easy startup
  • Metal-free exterior
  • Other options: barrier-chamber system for leak prevention, screw-on or flanged pulsation dampener, back-flushing system, stroke counter, diaphragm-monitoring system, and transport cart


Steel may be strong, but its final strength is only derived from the strength of the weakest link in its production chain. Realizing the importance of the pretreatment of steel in the hot-galvanizing process, the manufacturer set out to create a reliable system for end users, and found it in solid-body, plastic AODD pumps. Since 2006, the company has produced more than 50 flux-fluid systems that are used in steel-making applications around the world, all of which use plastic AODD pumps.