C-FLEX™ metal C-rings are sealing devices that use elastic deformation of a metal C-shaped substrate to create contact points on opposing sealing surfaces, with system pressure providing additional sealing load in service. They are available in materials including Alloy X750 and Alloy 718, with plating options such as silver, nickel, PTFE, or silver with gold strike. Seating loads range from 85 to 600 pounds force per circumferential inch depending on material, wall thickness, and size. Seal heights range from 0.047 to 0.250 inches, with free diameters from 0.325 to 25.000 inches. Groove dimensions and tolerances are specified for each size. The seals are designed for internal, external, and axial pressure applications and can be manufactured in custom shapes such as racetrack, square, triangular, and rectangular forms. They are qualified for use in aerospace, oil and gas, semiconductor, and high-performance automotive applications.
The sealing concept of C-FLEX™ metal C-rings is based on the elastic deformation of a metal “C” substrate which, during the compression cycle, gives a contact point on each sealing surface.
The substrate characteristics determine the compressive load of the seal. This load combined with an accurate compression rate results in a specific pressure which is directly related to the sealing level obtained. A certain specific pressure is necessary to make the seal flow into the flange imperfections. In service, the system pressure supplements this load. A softer surface treatment is available to increase the plasticity of the seal and reduce the specific pressure necessary to reach the desired sealing level.
Temperature range: from -273°C to 730°C (-460°F to 1350°F)
Pressure range: from medium vacuum to 2,000 bar (29,008 PSI)
Leak range: Approximately ≤ 25 cc/min @ 50 psig Nitrogen per inch of diameter to ≤ 1 x 10-4 std.cc/sec Air. The actual leak rate will depend on seal load, surface finish, and surface treatment.
| Technetics Group | |
|---|---|
| Product Category | Metal Ring Seals |
| Product Number | C-Flex |
| Product Name | Metal Seal |
| Application / Industry | Aerospace; Cryogenic; Piping/Valves; Power Generation; Oil/Gas; Vacuum; Automotive |
| Seal Type | C-Ring |
| Shape | Round; Custom Shapes And Sizes Available |
| Temperature | -459 to 1346 F (-273 to 730 C) |
