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SAE AIR1186 - INSTALLATION AND USE OF EQUILATERAL TRIANGLE CROSS-SECTION HYDRAULIC O-RING SEAL BACKUP RINGS (DYNA-BAKS) Organization: SAE
Date: 2011-12-01
Description: INTRODUCTION: The use of equilateral triangle cross-section hydraulic seal backup rings has been found to improve the life and reliability of high pressure O-ring seals especially for high temperature applications.
SAE AIR6082 - CALCULATIONS TO DETERMINE DIMENSIONS FOR BACKUP RINGS TO AS5781, AS5782, AS5860, AS5861 Organization: SAE
Date: 2016-06-01
Description: This AIR documents the methodologies used to calculate the dimensions and tolerances used in the following backup rings standards: AS5781 AS5782 AS5860 AS5861 In addition, an appendix is provided which provides details of gland and backup ring design practices.
SAE AS5782 - RETAINERS (BACKUP RINGS), HYDRAULIC AND PNEUMATIC, POLYTETRAFLUOROETHYLENE RESIN, SOLID, UN-CUT, FOR USE IN AS4716 GLANDS Organization: SAE
Date: 2015-04-01
Description: Because of the construction of groove dimensions, backup rings specific to rod applications are designated "R" - Rod (Female), backup rings specific to piston applications are designated "P" - Piston (Male).
SAE AMS3678/9 - TYPE 9 VIRGIN POLYTETRAFLUOROETHYLENE (PTFE) MOLDINGS WITH PIGMENT FOR AS4716 AND AS5857 BACKUP RINGS Organization: SAE
Date: 2016-02-01
Description: Application These products are to be used as backup rings in AS4716 Glands for both static and dynamic applications and in AS5857 Glands for static applications where dimensional stability up to 450 °F (232 °C) with good mechanical properties is required, but usage is need not be limited to such applications.
SAE ARP1802 - (R) SELECTION AND APPLICATION OF POLYTETRAFLUOROETHYLENE (PTFE AND TFE) BACKUP RINGS FOR HYDRAULIC AND PNEUMATIC FLUID POWER APPLICATIONS Organization: SAE
Date: 2014-12-01
Description:   Purpose To help the user selecting the right backup ring, this document provides guidance in the selection of backup rings for various applications.
SAE AS5781 - RETAINERS (BACKUP RINGS), HYDRAULIC AND PNEUMATIC, POLYTETRAFLUOROETHYLENE RESIN, SINGLE TURN, SCARF-CUT, FOR USE IN AS4716 GLANDS Organization: SAE
Date: 2015-04-01
Description: Because of the construction of groove dimensions, backup rings specific to rod applications are designated "R" - Rod (Female), backup rings specific to piston applications are designated "P" - Piston (Male).
NPFC - MS 27595 - RETAINER, PACKING BACKUP, CONTINUOUS RING, POLYTETRAFLUOROETHYLENE Organization: NPFC
SAE AS4716 - (R) GLAND DESIGN, O-RING AND OTHER ELASTOMERIC SEALS Organization: SAE
Date: 2011-03-01
Description: 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.
SAE AS8791 - HYDRAULIC AND PNEUMATIC RETAINERS (BACK-UP RINGS), POLYTETRAFLUOROETHYLENE (PTFE) RESIN Organization: SAE
Date: 2014-10-01
Description: CAUTION: Parts standard AS5781 for use in AS4716 glands and parts standard AS5860 for use in AS5857 glands have been published. Backup rings to AS8791 shall not be used in AS4716 or AS5857 glands.
SAE AS6235 - (R) FACE SEAL GLAND DESIGN, STATIC, O-RING AND OTHER SEALS FOR AEROSPACE HYDRAULIC AND PNEUMATIC APPLICATIONS Organization: SAE
Date: 2015-12-01
Description: The glands have been specifically designed for applications using AS568 size elastomeric O-rings with related Class 2 tolerances at nominal system operating pressures up to 3,000 psi (20,680 kPa) utilizing no anti-extrusion (backup) rings. While the gland dimensions herein have been designed for pressures up to 3,000 psi (20,680 kPa) these glands may be used for higher pressures, but extra precautions need to be taken and testing should be performed to ensure integrity of performance.
SAE AMS3678/5 - TYPE 5 VIRGIN POLYTETRAFLUOROETHYLENE (PTFE) MOLDINGS OR EXTRUSIONS WITH PIGMENT Organization: SAE
Date: 2016-02-01
Description: Application These products have been used typically for parts such as backup rings and seal elements in both static and dynamic applications requiring dimensional stability up to 450 °F (232 °C) with good mechanical properties, but usage is not limited to such applications.
SAE AMS3678/10 - TYPE 10 VIRGIN POLYTETRAFLUOROETHYLENE (PTFE) MOLDINGS OR EXTRUSIONS WITH 15% CARBON FIBER Organization: SAE
Date: 2016-02-01
Description: Application These products have been used typically for parts such as backup rings and seal elements in both static and dynamic applications requiring dimensional stability up to 450 °F (232 °C) with good mechanical properties, but usage is not limited to such applications.
SAE AMS3678/1 - TYPE 1 VIRGIN POLYTETRAFLUOROETHYLENE (PTFE) MOLDINGS AND EXTRUSIONS Organization: SAE
Date: 2016-02-01
Description: Application These products have been used typically for parts such as backup rings and seal components for static and light duty applications requiring dimensional stability up to 450 °F (232 °C) with good mechanical properties, but usage is not limited to such applications.
SAE AMS3678/12 - TYPE 12 10% MINERAL, 2.5% MOLYBDENUM DISULFIDE FILLED VIRGIN POLYTETRAFLUOROETHYLENE (PTFE) MOLDINGS OR EXTRUSIONS Organization: SAE
Date: 2016-02-01
Description: Application These products have been used typically for parts such as backup rings and seal elements against softer stainless steels and aluminum in both static and dynamic applications requiring dimensional stability up to 450 °F (232 °C) and wear and extrusion resistance with good mechanical properties, but usage is not limited to such applications.
SAE AMS3678/7 - TYPE 7 VIRGIN POLYTETRAFLUOROETHYLENE (PTFE) MOLDINGS OR EXTRUSIONS WITH 25% CARBON AND GRAPHITE Organization: SAE
Date: 2016-02-01
Description: Application These products have been used typically for parts such as backup rings and seal elements in both static and dynamic applications requiring dimensional stability up to 450 °F (232 °C) with good mechanical properties, but usage is not limited to such applications.
SAE AMS3678/8 - TYPE 8 VIRGIN POLYTETRAFLUOROETHYLENE (PTFE) MOLDINGS OR EXTRUSIONS WITH 10% CARBON FIBER Organization: SAE
Date: 2016-02-01
Description: Application These products have been used typically for parts such as backup rings and seal elements in both static and dynamic applications requiring dimensional stability up to 450 °F (232 °C) with good mechanical properties, but usage is not limited to such applications.
SAE AS4832 - GLAND DESIGN: NOMINAL 3/8 IN CROSS SECTION FOR CUSTOM COMPRESSION TYPE SEALS Organization: SAE
Date: 1994-06-01
Description: This SAE Aerospace Standard (AS) offers gland details for a 0.364 cross section gland (nominal 3/8 in) with proposed gland lengths for compression type seals with two backup rings over a range of 8 to 20 in in diameter. A dash number system is proposed similar to AS568A.A 600 series has been chosen as a logical extension of AS568A and the 625 number has been arbitrarily chosen for the initial number.
SAE ARP4727 - GLAND DESIGN, COMPUTATION OF SEAL SQUEEZE AND GLAND VOLUME Organization: SAE
Date: 2013-06-01
Description: The squeeze program, called SQ.BAS, has the following features: a. allows selection of either piston or rod gland b. allows entry of cap strip seal thickness c. computes minimum and maximum squeeze d. allows checking and correction of entries before execution e. allows viewing of output on screen before printing f. gives advisory messages for excessive stretch or inadequate squeeze g. allows on-line review of essential input and output variables prior to running program h. computes clearance between minimum gland height and maximum backup radial height when the backup dimension is entered i. program output is viewable on screen or may be printed out using either of two methods The glad volume program called GV.BAS, has the following features: a. allows selection of either piston or rod gland b. computes gland volume, O-ring volume and backup ring volume c. computes minimum and maximum percent occupancy d. allows viewing of output on screen before printing e. allows on-line review of essential input and output variables prior to running program f. allows entry of volume of a non-standard configuration or special seal such as a cap strip seal g. program output is viewable on screen or may be printed out using either of two methods.
SAE AMS3667 - POLYTETRAFLUOROETHYLENE (PTFE) SHEET, MOLDED GENERAL PURPOSE GRADE, AS SINTERED Organization: SAE
Date: 2011-08-01
Description: Testing of all specified properties is required. Type 2 For parts, such as seals, backup rings, and bearings, requiring chemical inertness and good mechanical properties up to 500 °F (260 °C).
ASTM D4024 - STANDARD SPECIFICATION FOR MACHINE MADE “FIBERGLASS” (GLASS-FIBER-REINFORCED THERMOSETTING RESIN) FLANGES Organization: ASTM
Date: 2015-05-01
Description: Flanges may be produced integrally with a pipe or fitting, may be produced with a socket for adhesive bonding to a pipe or fitting, or may be of the type used in conjunction with either a metallic or nonmetallic backup ring. The values stated in inch-pound units are to be regarded as the standard.

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