Internal Pressure
C Ring Internal
- Medium to high load
- Medium to high leak tightness
- Medium spring back
- Available in shaped seal
Please see tabs below to understand the information in this example.
Example: CI-009931-3.96M-2/0-2-SN50
CI: Internal pressure, system pressure energised
009931 = 99,31 mm for groove OD = 99,82 mm The seal diameter is always the outside diameter without plating. The diameter is calculated as follows: DSO = DG – DC – (plating thickness X 2) See figure below DSO = 99,82 – 0,41 – 2 X 0,05 = 99,31 mm
Select the proper axial section (AS) in the table, then select the material code “M or H” based on the desired wall thickness.
The first digit designates the C-Ring material, the second is always “0” in case of a C-Ring.
2: Age hardened
Plating code “SN” = Tin plating Plating thickness “50” = 30 to 50 µ


C Ring Internal Spring Energised
- High load
- High leak tightness
- Low spring back
- Available in shaped seal
Please see tabs below to understand the information in this example.
Example: CSI-024563-4.78M-2/2-1-S50
CSI: Internal pressure, spring energised
024563 = 245,63 mm for groove OD = 246,19 mm The seal diameter is always the outside diameter without plating. DSO = DG – DC – (plating thickness X 2) See figure below DSO = 246,19 – 0,46 – 2 X 0,05 = 245,63 mm
Select the proper axial section (AS) in the table, then select the material code “M or H” based on the desired spring load.
The first digit designates the C-Ring material, the second specifies the spring material.
1: Work hardened
Plating code “S” = Silver plating Plating thickness “50” = 30 to 50 µ


If you would rather contact us directly rather than email: Please call: +44 (0) 1384 413 058

External Pressure
C Ring External
- Medium to high load
- Medium to high leak tightness
- Medium spring back
- Available in shaped seal
Please see tabs below to understand the information in this example.
Example: CE-056688-6.35M-2/0-2-G50
CE: External pressure, system pressure energised.
056688 = 566,88 mm for groove ID = 566,27 mm The seal diameter is always the inside diameter without plating. DSI = DG + DC + (plating thickness X 2) See figure below DSI = 566,27+ 0,51+ 2 X 0,05 = 566,88 mm
Select the proper axial section (AS) in the table, then select the material code “M or H” based on the desired wall thickness.
The first digit designates the C-Ring material, the second is always “0” in case of a C-Ring.
2: Age hardened
Plating code “G” = Gold plating Plating thickness “50” = 30 to 50 µ


C Ring External Spring Energised
- Medium to high load
- Medium to high leak tightness
- Medium spring back
- Available in shaped seal
- Medium to high load
- Medium to high leak tightness
- Medium spring back
- Available in shaped seal
- High load
- High leak tightness
- Low spring back
- Available in shaped seal
Please see tabs below to understand the information in this example.
Example: CSE-033534-3.96M-2/2-1-N50
CSE: External pressure, spring energised.
033534 = 335,34 mm for groove OD = 334,83 mm The seal diameter is always the inside diameter without plating. DSI = DG + DC + (plating thickness X 2) See figure below DSI = 334,83 + 0,41 + 2 X 0,05 = 335,34 mm
Select the proper cross section or axial section (AS) in the table, then select the material code “M or H” based on the desired spring load.
The first digit designates the C-Ring material, the second specifies the spring material.
1: Work hardened
Plating code “N” = Nickel plating Plating thickness “50” = 30 to 50 µ


If you would rather contact us directly rather than email: Please call: +44 (0) 1384 413 058