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A-6C2 Seals Committee

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Standard

Metallic Seal Rings for High Temperature Reciprocating Hydraulic Service
2011-12-19
CURRENT
AIR1077A
An attempt has been made to consider all features of seal ring design including configuration, materials, hardness, dimensions, surface finishes, surface treatment, leak testing, and general quality. In addition to this, allowable cylinder breathing and general quality requirements of mating hardware are discussed. Also, at the end of this report, there is a brief paragraph on other types of seal rings.
Standard

METALLIC SEAL RINGS FOR HIGH TEMPERATURE RECIPROCATING HYDRAULIC SERVICE
1992-07-01
HISTORICAL
AIR1077
An attempt has been made to consider all features of seal ring design including configuration, materials, hardness, dimensions, surface finishes, surface treatment, leak testing, and general quality. In addition to this, allowable cylinder breathing and general quality requirements of mating hardware are discussed. Also, at the end of this report, there is a brief paragraph on other types of seal rings.
Standard

O-Ring Molded from AMS7267 Material, Metric
2019-07-10
CURRENT
MA3442A
This material type has a typical service temperature range of -85 to 500 °F (-65 to 260 °C). The operating temperature range of the material is a general temperature range, but the presence of particular fluids and design parameters may modify this range. ...The operating temperature range of the material is a general temperature range, but the presence of particular fluids and design parameters may modify this range.
Standard

Aerospace Size Standard for Oversize O-Rings
2019-12-02
CURRENT
AS5798A
This SAE Aerospace Standard (AS) specifies the dimensions, tolerances and size codes (dash numbers) for O-rings with a larger cross-section than those to AS568, for use in glands per MIL-G-5514 where squeeze at low temperature is often insufficient to provide a leak-tight seal.
Standard

O-Ring Molded from AMS7287 Material, Metric
2019-07-10
CURRENT
MA3445A
This material type has a typical service temperature range of -20 to +400 °F (-28 to +204 °C). These products are not suitable for use in phosphate ester based hydraulic fluids.
Standard

Aerospace Size Standard for Oversize O-rings
2013-11-22
HISTORICAL
AS5798
It specifies the dimensions, tolerances and size codes (dash numbers) for use in glands per MIL-G-5514 where squeeze at low temperature is often insufficient to provide a leak-tight seal. The dimensions and tolerances specified in this standard are suitable for any elastomeric material. ...An X suffix is part of the dash number to signify oversize. Temperature limitations of 275 °F (135 °C) and coefficient of thermal expansion of 9.0 × 10-5 unit length per °F (1.6 × 10-4 unit length per °C) were used for swell calculations.
Standard

Sealing Techniques for Missile Applications
2008-07-16
HISTORICAL
ARP1833A
Missile hydraulic and pneumatic component designers have been handicapped by the absence of concise design criteria for two difficult sealing conditions usually existing in missile applications as follows: Static pressure condition - Low pressure for long periods in a cyclic temperature environment (i.e., long term storage requirements). Dynamic pressure condition - High pressures suddenly applied in an extreme temperature environment (i.e., operational firing requirement). ...Dynamic pressure condition - High pressures suddenly applied in an extreme temperature environment (i.e., operational firing requirement). Each of the two conditions listed above are frequently required to be satisfied by a single seal in a missile hydraulic or pneumatic component with sealing requirements changing abruptly from the first to the second set of conditions.
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