procurement of spares of safety valves installed at boiler of 1x500 mw sgtps mppgcl birsinghpur , spares of drum sv-1,2 &3 : class-3000,type-slsv, size-3”/6”,model-1750wb , adjusting ring pinupper (1750wb) , spindle (1750wb) 7001 , disc (1750wb) 7005 , disc holder (1750wb) 7005 , disc collar (1750wb) 7005 , lift stop (1750wb) 7000 , spring adjuster , spring adjuster lock nut , upper adjusting ring , lower adjusting ring , lower adjusting ring pin , guide , overlap collar nut , spares of drum sv-4 to 6: class-3000,type-slsv, size-3”/6”,model-1740wb , adjusting ring pinupper (1740wb) 7001 , adjusting ring pinlower7135 , spindle (1740wb) 7001 , disc(1740wb) 7001 , spring(1740wb) , upper spring washer assembly , spring adjuster , spring adjuster lock nut , lower adjusting ring , guide , spares of ms sv- 7 & 8: class-3000,type-slsv, size-3”/6”,model-1740wd , disc(1740wd) , spindle (1740wd) , overlap collar (1740wd) , lift stop (1740wd) , upper adj ring pin , spares of crh linesv- 14 to sv-17: class-3000,type-slsv, size-3”/6”,model-1786wb , spring , spring adjuster , spring adjuster lock nut , upper adjusting ring , upper adjusting ring pin , loweradjusting ring pin , disc , disc collar , disc holder , spindle , guide , lift stop , overlap collar nut , spares of hrh linesv- 18 to sv-21: class-3000,type-slsv, size-3”/6”,model-1786wd , spring , spring adjuster lock nut , upper adjusting ring , upper adjusting ring pin , loweradjusting ring , loweradjusting ring pin , disc , disc collar , disc holder , guide , lift stop , overlap collar nut