First in Quality

Pump Construction


Total Quality Management is ingrained in the Iwaki Air brand of Air-Operated Double-Diaphragm (AODD) pumps, which are manufactured under stringent ISO 9001 Ver. 2008 standards. Quality is paramount in every aspect of the design, engineering and manufacture of Iwaki Air AODD pumps. An industry-leading and innovative pilot valve design and superior non-lubricated air valve technology are key to Iwaki Air AODD pump's renowned reliability. These pumps are designed and built using patented technology, with no mechanical seals or couplings, to provide years of leak-free operation. Quality is evident from the start, in the sourcing of raw materials, which come from well known and reputable global suppliers. Careful selection of high quality materials ensures exceptional chemical resistance compared to pumps made from inferior materials. Every pump is operation- and leak-tested to ensure years of reliable service.





  • Looped C-Spool Air Valve
    Revolutionary new spring design uses stronger, light-weight material for a smoother stroke with less wear and tear of all spool components (fully interchangeable with C-Spool model pumps).

  • Lube-free Operation
    Clean, environmentally friendly design is engineered without the need for lubrication. Lube-free operation extends the life of all air motor parts

  • Independent and Modular Pilot Valve
    Industry-leading pilot valve system design is fully independent and virtually non-wearing. Static seals are dirt and moisture resistant. Pilot valve and springs are made from high tensile stainless steel that will not bend or rust. Faster cycles with shorter strokes will extend diaphragm life.

  • Large Diameter Ports
    Oversized ports allowair contamination to pass through the pump elminating blockages and freezing.

  • Reduced Pump Stalling
    The unique new Looped C-Spool greatly reduces pump stalling.

  • Resists Freezing
    Compressed air expands gradually through our innovative staged air chamber exhaust system to reduce freezing. Large air port design allows contaminated air to pass through the pump and out the exhaust.


High Performance Liquid Transfer

Iwaki Air AODD pumps are engineered for maximum utility.

  • They are portable and easy to install,operate, and maintain.

  • Infinitely variable flow rates and variable discharge pressures can handle a large range of fluids, including corrosive chemicals and flammable liquids.

  • Able to run dry, self-prime and dead-head without damaging the pump.

  • Body stabilization features to ensure heat resistance, and sound suppression construction to reduce both mechanical noise and compressed air noise.

  • Lube-free air valve features a non-centering spring specially designed not to stall, and is accessible for easy maintenance. These pumps are built for power. A higher power output means the pump can operate with less applied air pressure compared with many competitor's pumps – often outperforming pumps that may have a higher listed flow rate.

    Low Maintenance, High value

The fundamental design of Iwaki Air AODD pumps will remain constant through the years. Our commitment to quality means pumps have a long service life and won't become obsolete.

  • Standardized parts – Standardized parts and components are used across various models and sizes. Pumps manufactured from different materials often many common parts so they are interchangeable.

  • Easy access – Most assemblies can be stripped down to completely independent and modular components. Easy accessibility allows fast replacement of individual parts.

  • No special tools required – Maintenance can be easily done by a single person using standard tools.

  • Modular components – Individual and pre-packaged kits allow cost-effective and fast replacement of only the worn parts rather than whole assemblies.

  • No need to stock extra parts – A few essential parts and kits in inventory can keep existing pumps running over a long period.