Hypervac - Industrial Compressors

All Cast Iron for long life and quiet operation. Slow R.P.M. from 420 to 995 for quiet operation & long life. Tapered roller bearings at both ends of crankshaft for superior support & less friction. Precision steel connecting rods with automotive type rod insert bearings at crankshaft & needle bearings at wrist pin for long service, life, & reliability. Disc & spring valves for easy service, higher efficiency and reliability. Pistons have 4-rings for higher efficiency & less oil carry-over. Centrifugal unloader for loadless start-up every time.