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Hydraulic and Pneumatic Retainers (Backup Rings), Polytetrafluoroethylene (PTFE) Resin
- Aerospace Standard
- AS8791D
- Revised
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This specification and part standard specifies polytetrafluoroethylene (PTFE) resin material and the dimensional requirements for scarf-cut retainers (backup rings) previously specified by MIL-R-8791 and MIL-R-8791/1. The retainers are intended for use in hydraulic and pneumatic system components as anti-extrusion devices in conjunction with seals and O-rings.
Rationale
This document has been revised to:
-
Clarify the use of these parts in glands other than MIL-G-5514
-
Update the references
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Add the requirement that no resizing of parts during the manufacturing process is permitted
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Delete the dimensional stability test requirement (since this test is performed on each lot of molded material as required by AMS3678)
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Include some editorial improvements
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Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 | ||
| Table 1A | Part numbers and dimensions, in inches | |
| Table 1A | Part numbers and dimensions, in inches (continued) | |
| Table 1A | Part numbers and dimensions, in inches (continued) | |
| Table 1B | Part numbers and dimensions, in millimeters | |
| Table 1B | Part numbers and dimensions, in millimeters (continued) | |
| Table 1B | Part numbers and dimensions, in millimeters (continued) | |
| Table 2 | Sampling requirements for lot sizes | |
| Unnamed Dataset 10 |
Issuing Committee
A6C2 is responsible for the development of standards, processes, and practices related to Seals, Scrapers and Bearings used in actuation systems for Commercial and Military air vehicles. The panel provides a forum for government engineers, prime contractors, OEMs and suppliers to exchange technical information, regulatory updates, recent technology developments, issues related to system development and in service operation and lessons learned.
Reference
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