supply of horizontal centrifugal radially split twin casing design slurry pump for ash water recirculation system of obra tps, obra, sonebhadra ( u.p. ) , horizontal centrifugal radially split twin casing design slurry pump fitted with mechanical seal technical specification: minimum flow: 550m3 / hr, minimum head: 36-37 mwc, pump efficiency: minimum 70%, slurry specific gravity: 1.05, pumped liquid: coal ash contaminated water, pump should be radially split design for ease of maintenance & with replaceable liners. material of construction: impeller: ultra chrome / high chrome material having minimum 27% chrome conforming to astm a 532 griiia, hardness range of minimum 600-650bhn typ., shaft sleeve: cf 8m confirming to astm a 743, shaft: en 8d carbon steel confirming to bs 970-1955, casing: ductile sg iron gr 500-7 confirming to is1865. mechanical seal; mechanical seal should be suitable for slurry application not for clear water. mechanical seal should be reputed make: eagle burgmann or flowserve make only. mechanical seal should be fitted with self-lubrication device ( sld ) . seal should be supplied with sld since clear water for seal flushing shall not be available at site. electric motor: lt motor specifications: 1. type: tefc squirrel cage induction motor of reputed makes like: marathon / abb / siemens or equivalent, 2. motor kw: maximum 110kw, 4 pole for main pump & 5.5 kw / 4p for vacuum priming system, 3. voltage / frequency: 415 v ac / 3phase / 50hz, 4. degree of protection: ip - 55, 5. method of cooling: totally enclosed fan cooled ( tefc ) , 6. space heaters / rtd: - to be provided, 7. duty class s1 ( continuous duty ) , 8. method of starting: dol lt starter panel: 1. dol starter suitable for maximum 110 kw and 5.5 kw lt motors, 2. plc control panel for lt motor driven dewatering pump-manual / auto operation interlocks with priming tank level switches, 3. outdoor lt control panel - ip55, 4. plc and hmi automation system for manual & auto mode operation, 5. lighting system on skid, 6. lube oil system interlocks signals, 7. cable tray work, control and instrumentation cable to panel terminations on skid, 8. aluminium armoured cable b / w lt motor to lt starer panel, 9. plug sockets for control cable and 415 v ac power supply.