bids are invited for naoh dosing skid - naoh dosing skid , supply of startup and commissioning spares - startup and commissioning spares , mandatory spares - all types of local indicators - level gauge/indicator - 20% of the total population or minimum 2 nos of each type / rating / model , mandatory spares -all type of electronic transmitters and ultrasonic transmitters including sensors - level transmitter - 10%. of each type and model , mandatory spares - valves 25 nb - 5% of the total population of each type, size and class or minimum 3 nos. of each type size & class whichever is more , mandatory spares - valves 15 nb - 5% of the total population of each type, size and class or minimum 3 nos. of each type size & class whichever is more total quantity : 1