Rod & Piston (Dynamic) Design Guide
'Rod' & 'Piston' styled O-ring grooves are commonly used dynamic O-ring sealing configurations. This page specifically concerns dynamic (moving) reciprocating Rod & Piston O-ring seals.
The purpose of the tables below are to serve as a design guide for dynamic reciprocating Rod & Piston O-ring grooves using AS568 O-ring sizes*.
* Please note that some AS568-0XX O-rings have atypical cross sections. Please see our General Groove Guide for more information, or feel free to get in touch with our engineers if you have any questions.
Canyon Components O-Ring Dynamic Rod and Piston Groove Design Guide with specifications for dimensions, tolerances, and sealing using Kalrez®, Canrez®, Chemraz®, and Parker® O-rings.
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Surface Finishes are RMS Values
| DASH # RANGE | O-RING CROSS SECTION | GLAND DEPTH (D) | SQUEEZE | GLAND WIDTH (W) | GLAND CORNER RADIUS | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AS568 | Nominal (in) | Nominal (in) | Actual (in) | Percent | Nominal (in) | R1 (in) | R2 (in) | |||||
| -006 through -012 | 0.070 ± 0.003 | 0.055 - 0.057 | 0.010 - 0.018 | 15 - 25 | 0.093 - 0.098 | 0.01 | 0.005 | |||||
| -104 through -116 | 0.103 ± 0.003 | 0.088 - 0.090 | 0.010 - 0.018 | 10 - 17 | 0.140 - 0.145 | 0.01 | 0.005 | |||||
| -201 through -222 | 0.139 ± 0.004 | 0.121 - 0.123 | 0.012 - 0.022 | 9 - 16 | 0.187 - 0.192 | 0.018 | 0.005 | |||||
| -309 through -349 | 0.210 ± 0.005 | 0.185 - 0.188 | 0.017 - 0.030 | 8 - 14 | 0.281 - 0.286 | 0.028 | 0.005 | |||||
| -425 through -460 | 0.275 ± 0.006 | 0.237 - 0.240 | 0.029 - 0.044 | 11 - 16 | 0.375 - 0.380 | 0.028 | 0.005 | |||||
Dynamic Seal Form
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Dynamic Seal Design Variables
When designing a dynamic seal, it's important to take all relevant applicational variables into account. We have listed the most important ones below for your reference.
Canyon Components strives to meet all customer service requests. Feel free to contact Canyon Components engineering and let our knowledgeable staff help you design the perfect part for your needs.
- Is this a new or existing application? If it's existing, is the current seal failing in application?
- What quantity would you like for us to quote?
- What is the expected yearly usage for this seal?
- What are the maximum and minimum temperatures that the seal will experience in use?
- What pressures will the seal experience in use?
- What chemicals and media will be making contact with the seal during use?
- Is the sealing assembly used in a dynamic or static application? If dynamic, what type? (Rotary, translational, or both)
- If dynamic, what is the speed of movement or rotation?
- What groove type is the seal being used in? (Rod, piston, or face)
- What are the relevant dimensions for the groove assembly?
- Groove Width (W)
- Groove ID (A)
- Groove OD (B)
- Groove Depth (C)
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