Tender For vacuum pump : dual stage vacuum pump, motor power 1 hp or above, operating on 230v 50hz single-phase power supply, 1/4 & 3/8 intake fitting flare, minimum flow rate/free air displacement 175 liter/min or above, ultimate vacuum pressure 15 micron, oil capacity 450 ml or above. makes make value, testo, navac or fieldpiece meeting the above specifications. the unit shall carry a minimum one-year warranty [ warranty period: 12 months after the date of delivery ]