tender for purchase of ro membranes and servicing of 500 lph ro plant for b2 boys hostel , 500 lph ro system plant - replacement membrane parts and service , 500 lph ro plant ro membrane • flow rate: 250 liters per hour • membrane size: 4040 (4 x 40) • max tds limit: up to 2000 ppm • salt rejection rate: 95% to 99% and necessary water pressure meters in ro system as required. , service charges (including installation of replacement parts like ro membranes, essential water pressure meter, pipe fittings,valves etc., and proper working demo at hostel premises) note: after successful replacement of ro membranes and service, tds of the ro purified water should be less than 100ppm.