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Argal Unveils New Air-Operated Double Diaphragm Pumps Made of Composites

Contributed by: PumpScout Staff

Argal, known for its chemical pumps and thermoplastic chemical-resistant materials, recently presented its new Mercury line of pneumatic double diaphragm pumps. Because the pump manufacturer has experience with pneumatic pumps ranging in size from ¼ to 2 inches in addition to manufacturing knowledge of fiberglass centrifugal pumps, it is now able to offer 3- and 4-inch pumps made out of thermoset resins that are capable of delivering 1,100 and 1,300 l/min.

Before this pump was available, the market lacked a solid and effective solution for large pneumatic pumps made of non-metallic materials. Thermoplastic resins and metal alloys have many physical and mechanical limitations that the composites used in Argal pumps resolve. The new line of Mercury diaphragm pumps is made of composite materials that include vinyl ester resins, and they are reinforced with glass fibers that are molded with the dependable RTM technique.

Argal pneumatic double diaphragm pumps offer benefits that include:

  • The highest chemical resistance among resin and polyester materials
  • Mechanical resistance that is comparable to some metal alloys
  • Insoluble and infusible thermosetting resins
  • Abrasion resistance
  • Capable of handling temperatures between -30°C and 110°C
  • Exceeds hydrostatic tests from 20 to 50 bar
  • Resistant to flame propagation

Internal components include:

  • Nitrile rubbers, ethylene-propylene, or fluorinated membranes and balls
  • PE high molecular weight or massive polyurethane ball seats made of anti-abrasion thermoplastic polymers

In addition, the pneumatic system is located in the central body and is made entirely of stainless steel AISI 316L. It is obtained through precision casting and hosts all the parts necessary to actuate the diaphragms and control air distribution.

Lubrication of the moving parts is not needed thanks to the pneumatic distributor that is manufactured with technical polymers. Without the need for regular lubrication, general maintenance on the diaphragm pumps is very rarely needed.

Source: Argal