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		                        | National Stock Number:
 4820-01-243-4204
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 012434204
 
 Description:
 DIAPHRAGM,ACTUATOR VALVE,SPECIAL
 
 Detail:
 An item constructed of one or more layers of thin flexible material, either laminated or separated, designed to form a tight seal between the chambers of a valve, and to transmit pressure inducted motion to a valve disk either directly or through a mechanical linkage. The surface of the item must be formed or molded to have a beaded or rolled edge, ribs or any other raised surfaces. The item may contain bolt holes and/or center holes. Excludes DIAPHRA GM, VALVE, FLAT and GASKET.
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 Manufacturer Information:
 
 | 291187EMK30-12 | 05073 | BABCOCK & WILCOX CO |  | 291187EMK30-12 | 58529 | THE BABCOCK & WILCOX COMPANY DIV B&W SERVICE COMPANY DBA B & W SERVICE CO | 
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 Techincal Specification:
 
 | CRITICALITY CODE JUSTIFICATION | ZZZY |  | MATERIAL THICKNESS | 0.167 INCHES MINIMUM AND 0.187 INCHES MAXIMUM |  | MATERIAL | STEEL CORROSION RESISTING |  | OUTSIDE DIAMETER | 7.979 INCHES MINIMUM AND 7.989 INCHES MAXIMUM |  | OVERALL HEIGHT | 0.732 INCHES MINIMUM AND 0.768 INCHES MAXIMUM |  | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |  | STYLE DESIGNATOR | SPECIAL SHAPED | 
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