... 2.size:148* 220* 154mm 3.brushless double-headed pump diaphragm pump item sizemm voltageDC/V PowerWpressurekpa Flow rate(L/min) ... -headed pump brushless, three-phase brushless DC motors without Hall, adjustable speed, adjustable flow, completely free of electromagnetic interference, air volume ... , not so solid foreign objects into the pump body, in the non-clean air in and out of the installation of ...