Metal Seal Type and Size Selection | Parker CSS eHandbook
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Selecting Seal Size and Type

Parker helps you select the best metal seal type for your application, then find the groove and metal seal dimensions you need.

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.

Metal Seal Design Chart

For additional part number information, please refer to: Seal Diameter and Seal Cross Section | Material, Temper, and Finish Codes

Download the Flow Diagrams

Download the flow diagrams below designed to provide guidance to 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

There are two basic types of applications:

Face Seal Applications

Face Seals for Higher Seating Loads Face Seals for Lower Seating Loads

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 below for a comparison of metal seal types.

Standard Metal Seals for Specific and Standard Applications

The metal seal type for these applications are listed below:

ECI: Boss Seal for MS-33649 Fluid Connection: Boss and MS-33514/33656 Fitting Ends
EEI:Metal E-Ring for AS1895 Flanges
EON: Metal O-Ring for Aerospace Standards