bids are invited for mechanical seal externally mounted with teflon bellow as secondary sealing with gft and ceramic face , spare for wna circulation pump in na-ii plant. mechl shaft seal assy consisting of gft bellow, ceram , mechanical shaft seal dia of shaft 31.5 mm spare for weak nitric acid (wna) circulation pump. only s , mechanical shaft seal, tb type ceramic/ gft as sealing face (suitable for 1½ dc becon pump) size 10 , mechanical shaft seal assembly complete with left hand wound spring as per drg. no. -ofba/ac/656 spar , mechanical shaft seal assembly complete with left hand wound spring as per drg. no. - ofba/ac/655 spar , gft bellow assy, complete for mechanical shaft seal of shaft dia-28.575 (1 1/8” ) total quantity : 220