Next Generation Diaphragm Pumps

FF Series Diaphragm Liquid Transfer Pumps

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Introducing the FF 12, and FF 20 -- two new OEM diaphragm pumps to aspirate, transfer, or pressurize liquids and liquid/gas mixtures.These advanced pumps are linearly-adjustable to 230 mL/min, generate pressure up to 44 psig, and self-prime to 10.5 inHg. With a service life to 20,000+ hours, the FF series diaphragm pumps are built to last.

The FF pump platform is underpinned by KNF's unique modular design concept which allows numerous customer-specific modifications, and applications-specific performance. Optimize for applications in medical device/diagnostics, reprographics, laboratory equipment, energy, cosmetics, cleaning/ disinfection, and more. Between the two model types, KNF's FF series diaphragm liquid pumps cover a wide variety of operations.

FF 12 Liquid Transfer Pump

FF 12 DC-M (with Brush DC motor)

  • Flow rate: up to 150 mL/min
  • Max. Pressure: 14.5 psig (1 bar)
  • Suction height: up to 9.0 in.Hg (3.0 mWg)

Download datasheet

FF 20 Liquid Transfer Pump

FF 20 BCD-4 (with BLDC 4-wire motor)

  • Flow rate: up to 230 mL/min
  • Max. Pressure: 43.5 psig (3 bar)
  • Suction height: up to 10.5 in.Hg (3.5 mWg)

Download datasheet

Features & Benefits

KNF diaphragm pumps feature a modular design
KNF's modular design concept

Equipped with high-quality brushless DC motors, the pumps require no maintenance and have a service life of 20,000h or more. Models with brush-commutated DC motors are available for customer applications that do not require such a long service life. A wide range of wetted materials are available, and the welded head parts ensure a high level of leak tightness, even with very volatile media.

  • Modular platform design allows customer-specific modifications
  • Wide flow rate adjustment range
  • Mounting plate with click-on mechanism for efficient installation and removal of the pump
  • High level of leak tightness, thanks to laser welded head parts, even with volatile media
  • Self-priming and safe to run dry lead to reliable operation
  • Clean and gentle transfer of sensitive media
  • Wide range of wetted materials to handle neutral to aggressive liquids
  • Expected service life of up to 20,000 hours with no maintenance 


  • Medical
  • Laboratory
  • Inkjet printing
  • Fuel cells
  • Semiconductor
  • Cleaning and disinfection

Contact a KNF Applications Engineer for pricing, samples, and/or custom specifications.