Simple structure, easy maintenance, also with competitive price. Product DescriptionFlow: 0-300 lphPressure: 0-500 BarPower: 370W, 550W, 220V / 380V / 400V/110V, 50/60HzDrive System: two and three phase motor,Anti-explosion motorFrequency conversion motorFlow Control: Manual operationMaterialPump head: SUS304, SUS316,304+PTFE,316+PTFEDiaphragm: PTFEValve: SUS304, SUS316, PVC, PTEFValve ball: ZrO2 ...