high pressure pump 1. the pump head is diaphragm pump 2. can supply high pumping head, high suction 3. maintaincefree High pressure self priming pump(HB pump) HB series high pressure self-priming pump are ... /2inch, 3/4inch, 1inchVoltage/Frequency: 220V, 110/220V, 50HZ, 60HZ Motor:Single phase/Three phaseClass of insulation: B/FProtection Level: IP44 ...