The Type YH680 is the ideal for general purpose applications. Its Alloy 20 bellows provide corrosion resistance in a broad range of services. Its cost-effective design, combined with a reliable performance history, has made the Type YH680 the standard for many applications found in the chemical, water and waste water, pulp and paper, and utility industries. □ Performance Capabilities Temperature: -75°C/-100°F to 200°C/400°F Pressure: vacuum to 20 bar / 300 psi Temperature: to 25 mps / 4500 sfpm □ Materials of Construction Bellow: Alloy 20 Adaptive Hardware: Alloy 20 Faces: Carbon, Tungsten Carbide, or Silicon Carbide Static Seals: Viton?, EPR?, Teflon? Encapsulated Viton, Buna-N, Teflon, Kalrez?, or Chemraz?