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The Composite Sealing Systems Division designs and manufacturers engineered seals and sealing systems consisting of metal-retained elastomeric combinations for static face seal applications and metal seals for extreme sealing environments.
Composite Seals
• Gask-O-Seal® volume/void seals
• Integral Seals™ edge molded seals
• Stat-O-Seal® fastener and fitting seals
• ThreadSeal fastener and fitting seals
• Lock-O-Seal® fastener and fitting seals
Custom-engineered composite seals incorporate the seal and another component in one part to help ease installation and reduce assembly costs. They include complicated parts such as rubber bonded to metal, plastic or filter materials. They simplify your design with one part instead of two or more, provide tighter tolerances and eliminate the seal to component installation process.
By molding the rubber seal directly to the mating metal or plastic components, a number of benefits are realized including:
1. Simplification of design -- one part instead of two or more
2. Tighter tolerances -- avoidance of tolerance stack-up
3. Elimination of seal to component installation process -- a source of defects and high costs
Metal Seals
• EnerRing® Metal Seals
• Metal Jacketed Gaskets
• Corrugated Gaskets
• Flat Metal Gaskets
• Metal Sealing Systems
Metallic seals offer excellent solutions to difficult sealing applications. In many cases, metal seals can replace elastomer or Teflon (PTFE)-based seals using the existing cavities. Selecting the correct metal seal for a particular application requires more care than for a comparable rubber or PTFE seal.
Things to Consider:
Fits: Unlike elastomer and most PTFE seals, metallic seals are manufactured to specific dimensions with tight tolerances, and the fit into the cavity is more critical. They cannot be stretched over rods or into shaped grooves and therefore, must be designed and manufactured to fit with proper shape and clearances.
Loads: Loads required to compress metal seals are greater than those for elastomer and PTFE seals.
Springback: This is the degree to which a seal will recover from the compressed state. Generally the larger the free height, the more resilient the seal. Seals with greater springback will continue to seal as flange surfaces separate during pressure and temperature excursions.
Pressure Capability: Metal seals can seal from high vacuum to 50,000 psi.
Leak Tightness: Metal seals are capable of achieving very tight leak rates, which depend upon a combination of factors, including flange surface roughness, lay direction, seal design, coatings, plating and the amount of compression. Unlike rubber O-rings, a metal seal's leak tightness diminishes when over compressed.
Temperature Capability: Metal seals are capable of operating at temperatures of -50° to 870°C (-60° to 1600°F), depending upon the seal and plating materials.
Chemical Resistance: Metal seals are constructed of corrosive-resistant alloys. Selecting the right material for extreme applications is critical.
Analysis: Metallic seals are generally used in extreme applications where the performance of conventional elastomeric or polymeric seals is unacceptable.
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