bids are invited for compaction pump for nmdc steel limited piston diaphragm pump item no. 1 as per ts , air supply device item no. 2 as per ts , compress air flow meter item no. 3 as per ts , diaphragm leakage indicator item no. 4 as per ts , o-ring item no. 5 as per ts , collar-type piston item no. 6 as per ts , o-ring item no. 7 as per ts , double diaphragm item no. 8 as per ts , o-ring item no. 9 as per ts , valve seat item no. 10 as per ts , valve ball item no. 11 as per ts , service set for make-up device item no. 12 as per ts , valve ball for make-up device item no. 13 as per ts , compression spring item no. 14 as per ts , sealing ring item no. 15 as per ts supply of spares double diaphragm piston total quantity : 19