LABOPORT® is a range of chemically resistant diaphragm vacuum pumps designed to withstand the harsh nature of aggressive or corrosive gases and vapours. Manufactured by KNF from quality components, the twin-head models N810.3, N820.3 and N840.3 are now ATEX rated to category 2G (internal atmosphere only), suitable for transferring gases or vapours where the occasional formation of an explosive atmosphere within the pump head is possible.