Binks 1/2″ Diaphragm Pump 818831 (Acetal / PTFE)


1/2″ Diaphragm Pump BINKS (Acetal / PTFE)

Part No.: 818831 (818831 is replaced by 41-818836)

Technical Specifications

  • Fluid Inlet/Outlet: 1/2″ 1/2″ NPT (F)
  • Flow Rate (max.):  7-GPM (26.5 lpm)
  • Ratio: 1:1
  • Fluid Pressure (max.):  6.9 bar
  • Air Pressure Operating Range: 1-6.9 bar
  • Air inlet: 1/4″ NPT (F)


  • Fluid Cap/Manifold Material: Groundable Acetal
  • Seat & Ball Material: Stainless Steel
  • Diaphragm: Teflon


This membrane diaphragm pump uses reciprocating Teflon diaphragms to convey the fluid. Teflon (or PTFE) is the most suitable material to withstand even very abrasive materials. The body of the pump (incl. fluid cap and manifold) are made of groundable acetal, therefore absolute non-corrosive.


Abrasive fluids and coatings, and wide range of paints, dyes, stains, glazes and lacquers.

Service Manual

81883X Binks diaphragm pump Operator manual (source: Binks)

Competitor Products

ARO-IR, Warren Rupp Sandpiper


This pump is not available anymore and replaced by Binks Gemini II (41-818836): click here