This specification covers a petroleum-base reference oil. This fluid has been typically used as a reference oil to estimate the ability of elastomeric compounds to conform to specified requirements after immersion at a specified temperature for a specified time and temperature as required by the material.
The information presented herein describes the commonly observed patterns of O-ring failure by means of both text and illustration. Possible causes and corrective actions are indicated for alleviating the problem.
1.1 Form This specification covers high temperature, compression set and fluid resistant fluorocarbon elastomer material to be used in the form of O-rings, compression seals, O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications. 1.2 Application These products have resistance to a variety of gas turbine engine oils, including high thermal stability (HTS) oils, fuels, and hydraulic fluids, but usage is not limited to such applications. Each application should be considered separately. This fluorocarbon (FKM) has a service temperature range of -65 to +400 °F (-54 to +204 °C) in air. 1.3 Safety - Hazardous Materials While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards, which may be involved in such use.
This specification covers a silicone rubber in the form of sheet, strip, tubing, extrusions and molded shapes. Primarily for parts required to operate or seal from -75 to +205 degrees C (-103 to +401 degrees F), compounded especially for high strength. Silicone elastomer is resistant to deterioration by weathering and by high-aniline-point-petroleum-base oils and remains flexible over the temperature range noted. These products are not normally suitable for use in contact with gasoline or aromatic fuels and low-aniline-point petroleum-base fluids due to excessive swelling.
This specification covers a silicone rubber material that can be used to manufacture product in the form of sheet, strip, tubing, molded shapes, and extrusions. This specification should not be used to address products such as O-rings, compression seals, O-ring cord, and molded-in-place gaskets.
This specification covers an ethylene propylene (EPM) rubber in the form of sheet, strip, tubing, molded shapes, and extrusions. Primarily for parts, such as gaskets, grommets, and seals requiring resistance to phosphate esters and/or to ozone. Not suitable for use in contact with petroleum base fluids due to excessive swell.