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Content 2. Z-Seal U-Cup Description 3. Profiles 4. Part Numbers 5. Design Considerations Surface Finish Extrusion Gap |
| Profiles |  | Square Z-Seal The standard Z-seal has a single lip design. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Deep Z-Seal Deep Z-seals are designed with a greater tolerance to side loading and additional compensation for axial run-out. The double lip design provides greater resistance to compression set and extended life for the elastomeric seal element. Deep Z-seals are ideally suited for dynamic rod applications as the depth of the design provides an increase in stability in higher-pressure applications. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Deep Z with Delta Back-up For applications exposed to severe shock loads or large clearance gaps, the modular “Delta” back-up ring provides the most economical way to close diametrical clearances with additional resistance to extrusion. Positively actuated to control friction, the split Delta design allows ease of installation and retains original seal height and groove depth. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Part Numbers 
Example: Z 5000 3000 750 D - Urethane base/Nitrile seal lip Deep Z-Seal - 1/2" C/S, 3" I.D., 3/4" Height Z-Seals standard part numbers are based on a urethane base material and a nitrile loader. Other popular materials include a Fluorotrel® base, Viton™ loader, and low temperature loader. Go to Z-Seal size charts. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Design Considerations Surface Finish The chart below provides you with a general guideline on surface finish. However, RMS surface finish alone does not ensure good seal performance and in some applications you will need to contact Hi-Tech Seals for additional recommendations. Surface finishes that are too high or too low can reduce seal life.
Extrusion Gap
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