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 1