Piston diaphragm pumps of type C409.2-KM, controllable

Flow rate from 7,5 l/h to 190 l/h, counter pressures up to 80 bar

sera piston diaphragm pumps C409.2-KM are leakage-free oscillating displacement pumps designed for the dosing of volumes. They are an ideal combination of the high supply pressure of a piston pump and the perfect leak-proofness of a diaphragm pump.

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​Product information Series 4 Piston Diaphragm Pumps

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Capability characteristics

  • Leakage free
  • Higest dosing accuracy
  • Dry safety run
  • High quality materials
  • Continuous operation with minimum maintenance
  • Long operating life
  • Easy to operate
  • Integrated safety device against overpressure
  • Micro-processor controlled
  • Controlled by standard or digital signals
  • Dosing monitoring
  • Level input

Field of application

Flow-free mediums with the following characteristics:

  • aggressive
  • abrasive
  • viscous
  • radioactive
  • flammable
  • toxic


Design and Function

Thanks to the built-in multi-layer diaphragm safety difficult metering tasks can be performed with ease.
A diaphragm rupture signale supports the safety via a pressure switch an a manometer.

Materials and Options

A suitable material is available for each dosing medium!

  • Pump body and valves: PVC, PP, PVDF, 1.4571, Titan, PP-FRP, PVDF-FRP
  • Valve balls: PTFE, 1.4401
  • Valve seals: EPDM, FPM, FEP-covered
  • Working diaphragm: PTFE (3-ply)

Please ask us for any material required but not mentioned here

Available designs

Typ Q p/max.
C409.2-7,5KM up to 7,5 l/h 80 bar
C409.2-10KM up to 10 l/h 80 bar
C409.2-18KM up to 18 l/h 50 bar
C409.2-45KM up to 45 l/h 25 bar
C409.2-95KM up to 95 l/h 16 bar
C409.2-190KM up to 190 l/h 8 bar