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USED: Graham "Heilflow" spiral heat exch... USED: Graham "Heilflow" spiral heat exchanger, model 30SF-32LL.282 sq ft, carbon steel shell side, copper tubes product side. Shell side 225 psi @ 200 deg F. Tube side 150 psi @ 200 deg F.3" diameter inlets/outlets. ASME coded. NB #14351. Year 1985.Note: 30 coils, 3/4" diameter. and the product is still available, |