SELECTING THE METAL SEAL TYPE FOR YOUR APPLICATION
Metal seals are produced in a number of standard designs which are appropriate for use in a broad spectrum of the most commonly encountered applications. The Metal Seal Type is designated in the part number as shown below.
For additional part number information, please refer to: Seal Diameter and Seal Cross Section (illustrated below), and the Material Selection page for Material, Temper, and Finish codes.
DOWNLOAD THE FLOW DIAGRAMS
There are two basic types of applications: Face Seal Applications and Axial Seal Applications,
The flow diagrams linked below are designed to provide guidance in downselectiong the appropriate metal seal type for your application.
> Face Seals for Higher Seating Loads & Lowest Leakage Rates
> Face Seals for Lower Seating Loads & Higher Springback
Download the Flow Diagrams
SEAL SELECTION AT A GLANCE
In addition to the metal seal selection flow diagrams, the following rating table provides simple guidelines which can be used to confirm the appropriate metal seal selection. Refer to the table shown for a comparison of metal seal types or click here to use the online metal seal comparison tool.
Standard Metal Seals for Specific and Standard Applications
The metal seal type for these applications are listed below:
• ECI: Boss Seal for AS5202 Fluid Connection Boss & AS33514/AS4395 Fitting Ends
• EEI:Metal E-Ring for AS1895 Flanges
• EON: Metal O-Ring for Aerospace Standards
SEAL DIAMETER & CROSS SECTION
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METAL SEAL SIZE SELECTION
From the links herein listed under the headers Axial Seals, Seals for Standard Applications, and Face Seals, click the metal seal type selected for your application for next steps in determining the appropriate seal diameter, cross section and cavity dimensions.
Cavity, seal dimensions and seal performance data for the standard metal seals are included in the PDF for each type. You can also learn more about Material, Temper, and Finish Codes.
AXIAL SEALS
ECA Metal C-Ring, Axial Seal
SEALS FOR STANDARD APPLICATIONS
Boss Seal for AS5202 Fluid Connection Boss and AS33514/AS4695 Fitting Ends
Metal E-Ring for AS1895 Flanges
Metal O-Ring for Aerospace Standards
FACE SEALS
ECI Metal C-Ring, Internal Pressure Face Seal
ECE Metal C-Ring, External Pressure Face Seal
ESI Spring Energized Metal C-Ring, Internal Pressure Face Seal
ESE Spring Energized Metal C-Ring, External Pressure Face Seal
EEI Metal E-Ring, Internal Pressure Face Seal
EEE Metal E-Ring, External Pressure Face Seal
EOI Metal O-Ring, I.D. Vented, Internal Pressure Face Seal
EON Metal O-Ring, Plain, Internal Pressure Face Seal
EOP Metal O-Ring, Pressure Filled, Internal Pressure Face Seal
EOE Metal O-Ring, O.D. Vented, External Pressure Face Seal
EOM Metal O-Ring, Plain, External Pressure Face Seal
EOR Metal O-Ring, Pressure Filled, External Pressure Face Seal
EUI Metal U-Ring, Internal Pressure Face Seal
EUE Metal U-Ring, External Pressure Face Seal