Now that you have established the design flow rate and the reseal pressure (which is 1.0 to 1.5 psi below the flow rate pressure), you may proceed to actual selection of the Breather Valve you will need.
The Breather Valve Selection Chart (Fig. 5) will give you the flow rates of the various Breather Valves listed on this website, and indicate maximum net volumes of containers they may be used on.
Each Breather Valve data sheet includes a Part Number Designation Chart which shows how to designate the desired resealing pressures in the part number of the valve. Dimensions, performance characteristics and optional features, such as a manual release button (essential for breaking a vacuum seal) and RFI/EMI shielding, are also indicated.
SAE Specification AS27166, entitled “Valve: Pressure Equalizing, Gaseous Products,” details environmental requirements and the procedures for vibration, temperature, salt, fog, sand and dust, rough handling, etc., as well as settings and flow. (Note: Many design activities have found it impractical to use the settings designated in this specification and have called out other settings more suitable for their particular container design.) AGM Breather Valve Series TA238
will meet all requirements of this specification (see Environmental Protection, above). AS27166 is also referenced in Department of Defense MIL-STD-648C.
In addition, AGM’s Breather Valves are specified on more than 300 Army, Navy and Air Force drawings.
If you require identification of AGM Breather Valves with a part number other than one shown on this website, please contact AGM for part number verification. You should also contact AGM if you plan to put one of AGM’s catalog numbers on a document requiring MIL-STD-130 identification.
If you have special requirements which cannot be met by using a standard valve, please contact AGM’s design engineering team
regarding possible modifications or a special valve design to meet your needs.