INCH-POUND
MIL-DTL-23450D
11 October 2005
SUPERSEDING
MIL-V-23450C
19 June 1974
DETAIL SPECIFICATION
VALVES, EXPANSION, THERMOSTATIC,
REFRIGERANT-12 (R-12) AND REFRIGERANT-22 (R-22)
Inactive for new design after 1 April 1996
This specification is approved for use by all Departments and Agencies of the Department of Defense.
1. SCOPE
1.1 Scope. This specification covers two types and two styles of thermostatic expansion valves for use
with refrigerant 12 (R-12) and refrigerant 22 (R-22).
1.2 Classification. The thermostatic expansion valves described in this specification are of following
types and styles and sizes and capacities as specified in MS17982 (see 6.2).
1.2.1 Types: The types of thermostatic expansion valves are as follows:
1.2.1.1 Type I: Type I valves have an internal equalizer. Valves for use with R-12 have a pressure
limiting feature. Valves for R-22 do not have a pressure limiting feature.
1.2.1.2 Type II: Type II valves for use with R-12 and R-22 are the external equalizer type.
1.2.2 Styles:
1.2.2.1 Style I: Straight-through pattern as specified in MS17982.
1.2.2.2 Style II: Angle pattern as specified in MS17982.
2. APPLICABLE DOCUMENTS
2.1 General. The documents listed in this section are specified in sections 3, 4 or 5 of this
specification. This section does not include documents cited in other sections of this specification or
recommended for additional information or as examples. While every effort has been made to ensure the
completeness of this list, document users are cautioned that they must meet all specified requirements
documents cited in sections 3, 4 or 5 of this specification, whether or not they are listed.
Comments, suggestions, or questions on this document should be addressed to: Defense Supply
Center Columbus, Attn: VAI, P.O. Box 3990, Columbus, Ohio, 43218-3990 or emailed to
Construction@dscc.dla.mil. Since contact information can change, you may want to verify the
currency of this address information using the ASSIST Online database at https://assist.daps.dla.mil.
AMSC N/A
FSC 4820
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