The Type YH609 incorporates all of the rugged features of the Type YH604, but is intended for those demanding applications where a dependable, high strength, rotating seal is preferred. A narrow cross-section design enables the Type YH609 to fit in most popular consuming stuffing box modifications. This makes it the ideal seal for heat transfer and other applications that commonly use pumps with limited seal chamber clearances □ Performance Capabilities Temperature: -75°C/-100°F to 425°C/800°F with Graf oil static packing Pressure: vacuum to 20 bar / 300 psi vacuum to 69 bar / 1000 psi with DOUBLE-PLY bellows Speed: to 50 mps / 10,00 sfpm □ Materials of Construction Bellow: Heat-treated AM350 or Inconel 718 Adaptive Hardware: 300 Series Stainless Steel Faces: Carbon, Tungsten Carbide, or Silicon Carbide Static Seals: Graf oil