Spir Star Hydraulics Ltd

Air‑Operated Double Diaphragm (AODD) Pump

Parameter Specification
Drive Compressed air (pneumatic)
Max Suction Lift Up to 7 m (self‑priming)
Flow Rate 20–800 L/min (depending on size & air pressure)
Pressure Range Up to 8.6 bar (air supply dependent)
Materials PP, PVDF, Aluminium, SS316
Diaphragm Options PTFE, EPDM, Neoprene, Santoprene
Applications Corrosive chemicals, slurries, solvents, wastewater, hazardous liquids

Description

The AODD Pump is a versatile positive displacement pump powered entirely by compressed air. With no electrical components or mechanical seals, it safely transfers corrosive, viscous, or abrasive chemicals, slurries, and solvents. Its self‑priming capability and ability to run dry without damage make it ideal for chemical transfer operations in hazardous environments.

Main Features

  • Compressed air drive — no electricity required, safe in explosive atmospheres
  • Self‑priming capability — lifts fluids from depths up to 7 m
  • Run‑dry protection — operates without fluid without damage
  • Handles difficult fluids — viscous sludge, abrasive slurries, shear‑sensitive emulsions, corrosive chemicals
  • Material versatility — housings available in PP, PVDF, Aluminium, SS316; diaphragms in PTFE, EPDM, Neoprene, Santoprene
  • Simple design — no rotating shafts, seals, or bearings in fluid path

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