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1/4″ Non-Metallic Air Operated Diaphragm Pump


Adjustable 0 to 4.3 GPM

Max/Min Air Pressure:

All Models 100/20 PSI

Dry Lift Capacity at 100 PSI:

Models w/ Teflon Valves 15 ft.
Other Models 20 ft.

Maximum Solids: 1/16"

Fluid Inlet/Discharge: 1/4" NPSF

Models (Wetted Materials) Max Temp

LPB – 1/4″ (PP/BUNA N) 150 °F
LPT – 1/4″ (PP/TEFLON) 150 °F
LNT – 1/4″ (NYLON/TEFLON) 150 °F
LKT – 1/4″ (PVDF/TEFLON) 200 °F


For the laboratory sector, small plants, requirements with small delivery volume at relatively high pressure.

  • Absolutely lube-free and non stalling operation
  • Can safely run dry
  • Self-priming dry or wet
  • Centre block made of corrosion-free plastic
  • Few, easily accessible construction parts
  • Flow rate up to 16 l/min
  • Explosion-proof version in compliance with ATEX
  • Directive 94/9/EC, category 2
  • No risk of pump failure due to to poor lubrication
  • No contaminating of the environment or of the product itself by oil vapour
  • Gentle pumping of liquids and pastes
  • Flow rate and pressure can be regulated continuously
  • No dynamic seals
  • Possible air leakage arising at connections or in case of diaphragm rupture does not harm the air system
  • Easy maintenance without special tools