Diaphragm pump FM 50
for gasbrushless DCself-priming

Diaphragm pump - FM 50 - KNF - for gas / brushless DC / self-priming
Diaphragm pump - FM 50 - KNF - for gas / brushless DC / self-priming
Diaphragm pump - FM 50 - KNF - for gas / brushless DC / self-priming - image - 2
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Characteristics

Technology
diaphragm
Fluid
for gas
Operation
brushless DC
Priming
self-priming
Mobility
stationary
Domain
industrial, for the chemical industry, for the food industry, agriculture, for the pharmaceutical industry
Material
PTFE, PP, EPDM
Fluid specification
for aggressive media, for neutral media
Other characteristics
adjustable, digital, with digital control, with FKM seal, with EPDM seal
Flow

Min.: 0 m³/h
(0 ft³/h)

Max.: 0.03 m³/h
(1.05944 ft³/h)

Pressure

Min.: 0 bar
(0 psi)

Max.: 1 bar
(14.504 psi)

Head

Min.: 0 m
(0'00" )

Max.: 3 m
(9'10" )

Description

Overview
KNF diaphragm metering pumps for liquid handling combine compact design with chemical-resistance for precise, continuous dosing. Suitable for neutral and aggressive media, the FM 50 series is dry-running capable, self-priming and maintenance‑free. Multiple motor and hydraulic connection options allow integration into automated systems.

Benefits
  • Excellent reliability
  • Low pulsation
  • NSF certified
  • Maintenance-free operation
  • Can run dry
  • FDA-approved material options available
  • Self-priming
  • Robust under varying process parameters
  • Linear and predictable flow
  • High dosing accuracy
  • Customized calibration available
  • Adjustable performance
  • Highly resistant to aggressive media
  • Digitally adjustable motor option


Special Features
  • Low pulsation
  • NSF certified


Technical Details
  • Flow rate (max.): 0.5 l/min
  • Pressure (max.): 1 bar (rel.)
  • Suction height (max.): 3 mH₂O
  • Valve material options: EPDM, FFKM
  • Diaphragm material options: EPDM, PTFE
  • Pump head material options: PP
  • Motor type options: Brushless DC


Applications
  • Analytical instruments
  • Chemical industry
  • Cleaning and disinfection
  • Food & beverage industry
  • Fuel cells
  • Inkjet printing
  • Laboratory equipment
  • Medical equipment
  • Semiconductor processes


Downloads (available)
  • Datasheet FM 50 — PDF
  • Operating Manual FM 50 — PDF
  • 3D CAD Model FM 50 — ZIP


Notes
Sample available for evaluation. Multiple valve, diaphragm and motor material options support handling of neutral to aggressive liquids and facilitate regulatory compliance.

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Exhibitions

Meet this supplier at the following exhibition(s):

MEDevice Boston 2026
MEDevice Boston 2026

26-27 Aug 2026 Boston (USA - Massachusetts)

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    *Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.