KNF‘s new FP 150 multi-diaphragm liquid pump offers linear flow adjustment from 0.2 to 1.5 l/min, low pulsation and continuous duty up to 2 bar pressure.
Low pulsation is a key feature: By using five diaphragms to provide smooth laminar flow, pulsation values are typically below 150 mbar (at the pump outlet) at nominal flow rate and lower still depending on system configuration and running speed. The benefits include greater pumping efficiency, greater flow through your system at lower pressure and no vibration of the pump and tubing – resulting in less stress on system components. In this respect, the new FP 150 fares just as well as gear pumps whilst offering the additional advantages of a diaphragm pump: self-priming, the ability to run dry, chemical and abrasion resistance, no contamination of media, gentle (low-shear) transfer of delicate media, stability with changing viscosity, no cavitation, long service life, etc.
Linear adjustment of the flow rate is another strong feature of the new FP 150. The pump is driven by a 5-wire brushless DC motor with integrated electronics offering linear speed control via either a 0 to 5V control voltage or an inverse PWM signal. Thanks to the stability of the pump and the laminar flow it produces, the flow rate can be adjusted between 10% and 100% of the nominal flow rate with outstanding linearity. The FP 150 is stable against back pressure (up to 2 bar) and, with a PTFE-coated diaphragm as standard (FFKM is an option on request) and a choice of FFKM or EPDM valves available, it can pump a wide range of challenging fluids. During its development, the FP 150 has been intensively tested at several OEMs in the USA, UK, Italy and Israel and has already aroused broad interest. Suitable applications include medical devices, diagnostic instruments, laboratory equipment, industrial inkjet printing, semiconductor, fuels cell and cleaning & disinfection applications.
