Dosing very aggressive and corrosive liquids in laboratories is a challenge that can be effectively addressed with diaphragm pumps, according to KNF Neuberger, a supplier in this space.
The firm says its new SIMDOS® 02 FT (full Teflon®) has been especially developed for the transfer of aggressive chemicals. To facilitate this, it is fitted with a PTFE head, a PTFE-covered diaphragm, and chemically resistant valves (FFKM Kalrez®). An optional Chemraz® valve kit can support the pump’s use with highly concentrated acids such as nitric, sulphuric and hydrochloric acid, in addition to solvents such as TFH, DMF, DMSO and MEK. The pump head is situated outside the splash-protected IP-65 housing, cited as a very significant safety feature.
Also available with heads in PP or PVDF, the new dosing pump transfers liquids with a flow rate of 30 µl to 20 ml/min, and dose volumes of 30 µl up to 999 ml. Following calibration, repeatability is +/-1% (full range) and the pump is claimed to offer “excellent” long-term stability and consistent reliability throughout entire processes.
The part is also seemingly safe to run dry and is self-priming up to 2 m. KNF’s literature says it is effective against pressures of up to 6 bar, and transfers viscous media up to 150 centistokes. The integrated software permits the transfer parameters to be modified for a range of different viscosities at the touch of a button. KNF says a small footprint means the dosing pump takes up very little valuable laboratory space.