With the introduction of new FP 150, KNF has expanded its line of low pulsation liquid diaphragm pumps. The line of products is said to combine the pulsation level previously only achieved by gear pumps with advantages of diaphragm pump technology — self-priming, safe to run dry, and long service life.
Pulsation at the nominal flow rate for the smaller KNF FP 150 is less than 150 mbar directly at the pump outlet. Peak-to-peak pulsation levels far below this are achievable, depending on system materials, configuration, running speed, and other damping methods. The pump delivers up to 1.5 L/min of liquid at back pressure up to 29 psig (2 barg), with complete linear control of flow between ~10% and 100% of the nominal flow rate (0.2 to 1.5 L/min). Pump flow is fully stable with fluid viscosities ranging between 1 and 150 cSt, the company says. The pump can also handle viscosities up to 500 cSt with some flow rate reduction.
The KNF line of low-pulsation liquid pumps are designed specifically to provide gentle, low-shear conveyance of sensitive media. Other strengths of the line are said to include very low vibration and noise, chemically resistant flow path material options for use with aggressive media, and appropriate IP protection ratings.
The benefits of FP 150 make it suitable for recirculation applications in a diverse set of markets, including:
- Medical Devices — temperature management, including aesthetic laser cooling systems;
- Fuel Cells — fuel recirculation and membrane hydration; and,
- Additional Markets: clinical diagnostics, laboratory equipment, 3D and inkjet printing, coatings, semiconductors.
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