2820901101_EN_PC5xx-6xx_VARIO_select_Serie_V1.0_280618Product description3.2 Chemistry pumping unit seriesOverview of the PC 500/600 select chemistry pumping unitsEKaEKbEKcEKdEKeEKfChemistry pumping unit Pump head Valve manually Valve electricallya PC 510 select 2 1xb PC 610 select 4 1xc PC 511 select 2 1x 1xd PC 611 select 4 1x 1xe PC 520 select 2 2xf PC 620 select 4 2xOverviewChemistry pumpingunitsMeaning