This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Gland Design, O-ring and Other Elastomeric Seals
- Aerospace Standard
- AS4716B
- Revised
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This SAE Aerospace Standard (AS) provides standardized gland (groove) design criteria and dimensions for elastomeric seal glands for static and dynamic applications. The glands have been specifically designed for applications using SAE AS568 size O-rings, with related class 2 tolerances, at pressures exceeding 1500 psi (10.34 MPa) utilizing one or two anti-extrusion (backup) rings and applications at pressures below 1500 psi (10.34 MPa) without backup rings. The glands have been sized to provide sufficient squeeze for effective sealing while at the same time limiting squeeze to allow satisfactory operation in dynamic applications. While this specification covers the basic design criteria and recommendations for use with standard size O-rings, these glands are also suitable for use with other elastomeric, and polytetrafluoroethylene (PTFE) based seals. For static external applications i.e. where the application is overboard and sealing to atmosphere, glands should be designed in accordance with AS5857.
Rationale
Revision B to AS4716 is a general update using current SAE format, minor corrections and dimensional tables added in metric units. Reference to AS5857 for static external (overboard to atmosphere) glands has also been added.
Recommended Content
Topic
Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
TABLE 1 | GROOVE WALL ANGLE DETAILS | |
TABLE 2 | GROOVE BREAK EDGE DETAILS | |
TABLE 3A | STANDARD GLAND DIMENSIONS AND O-RING SQUEEZE IN INCHES | |
TABLE 3B | STANDARD GLAND DIMENSIONS AND O-RING SQUEEZE IN MILLIMETERS | |
TABLE 4A | STANDARD GLAND WIDTH FOR ZERO, ONE, AND TWO BACKUP IN INCHES | |
TABLE 4B | STANDARD GLAND WIDTH FOR ZERO, ONE, AND TWO BACKUP IN MILLIMETERS | |
TABLE 5A | STANDARD GLAND DIAMETRAL CLEARANCE DIMENSIONS IN INCHES | |
TABLE 5B | STANDARD GLAND DIAMETRAL CLEARANCE DIMENSIONS IN MILLIMETERS | |
TABLE 6 | STANDARD CORNER RADIUS DIMENSIONS IN INCHES & MILLIMETERS | |
TABLE 7 | ECCENTRICITY FOR STANDARD GLANDS IN INCHES & MILLIMETERS | |
TABLE 8 | SURFACE ROUGHNESS REQUIREMENTS |
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
* Redlines comparisons are available for those standards
listed in the Revision History that contain a radio button. A
redline comparison of the current version against a revision is
accomplished by selecting the radio button next to the standard and
then selecting 'compare'. At this time, Redline versions only exist
for some AMS standards. SAE will continue to add redline versioning
with ongoing updates to SAE MOBILUS.