JBB series chemical metering Pump dosing pump,metering ... AC: 220,380,DC:12\24V JBB series Machnical Diaphragm Dosing Pumpchemical metering pumpmetering pump, ... high-viscosity mediums, corrosive liquid and dangerous chemical goods.4.The flow can be controlled via ... stroke or the motor frequency.PurposeWidely used in petroleum, chemical industry, electric power, metallurgy, mining, shipbuilding,light ...