procurement of fabric seals to be used in rotary air pre-heater of 2x660 mw units, sstpp, mppgcl, dongalia procurement of fabric seals to be used in rotary air pre-heater of 2x660 mw units, sstpp, mppgcl, dongalia , high temperature resistant fabric seals for raph of size 470x5685mm, 6 layers ofthickness, as per drawing attached drawing. material characteristics andspecs low thermal conductivity, low heat storage, high temperature stable, thermal shock resistant fire and flame proof chemical resistant, compatible with most corrosive chemicals, reinforcedwith fiber glass filament, working temp. upto 500 deg. c