Type 604
Manufacturer: John Crane
High temperature, Stationary Edge welded Metal Bellows Seal
The Type 604 is a high temperature, general purpose, stationary edge welded metal bellows assembly for applications to 425C/800F. Available in either AM350 or Alloy 718, its high strength design provides maximum reliability. The stationary bellows design accommodates high shaft to seal chamber misalignment. Unlike rotating seals that must flex on every revolution to accommodate shaft to seal chamber misalignment, the stationary Type 604 adapts to this condition by flexing only once during installation. This reduces seal movement, resulting in increased seal life. Typical applications include hot hydrocarbons, aqueous solutions, aromatic fractionation products, crude oil fractionation products and heat transfer fluids.
• DOUBLE PLY for high pressure applications.
• High temperature to 425C/800F.
• API 682 qualified.
• Available in dual and single cartridge arrangements.
• Available with secondary containment.
• Elastomer free design with flexible carbon graphite secondary seals.
• Seal face is available with premium grade carbon, silicon carbide or tungsten carbide.
TEMPERATURE LIMITS100°F to 800°F/ 75°C to 425°C with flexible graphite static packing
PRESSURE LIMITSVacuum to 360 psi(g)/25 bar(g) - -DOUBLE PLY: Vacuum to1000 psi(g)/69 bar(g) - -(See Basic Pressure Ratings curve on Product Specification sheet.) -
SPEED LIMITS10000fpm/50m/s