INCH-POUND
MIL-PRF-24790A (SH)
23 November 1998
SUPERSEDING
MIL-P-24790(SH)
1 July 1994
PERFORMANCE SPECIFICATION
PACKING MATERIAL, BRAIDED, NON-ASBESTOS
This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is
available for use by all Departments and Agencies of the Department of Defense.
1. SCOPE
1.1 Scope. This specification establishes the requirements for braided non-asbestos packing material for
rotary, centrifugal, and reciprocating pumps handling various fluids and gases on naval ships.
1.2 Classification. The packing is of the following types and classes as specified (see 6.2).
Type I -- Rotary and centrifugal pump applications
Class A -
Class A meets the requirements for all of the following services:
Fresh water (150 pounds per square inch differential (psid)/250 degrees
Fahrenheit (ºF)/max. shaft speed 4,000 feet per minute (fpm)).
Seawater (500-625 psid/75 ºF/max. shaft speed 1,700 fpm).
Boiler feedwater (100 psid/300 ºF/max. shaft speed 5,400 fpm).
Type II -- Reciprocating pump applications.
Class A -
Saturated L.P. steam (300 psid/420 ºF/max. shaft speed 170 fpm).
2. APPLICABLE DOCUMENTS
2.1 General. The documents listed in this section are specified in sections 3 and 4 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 and 4 of this
specification, whether or not they are listed.
2.1 Government documents.
2.1.1 Other Government documents, drawings and publications. The following other Government
documents, drawings, and publications form a part of this document to the extent specified herein. Unless
otherwise specified, the issues are those cited in the solicitation.
Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in
improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 03R42, 2531
Jefferson Davis Hwy, Arlington, VA 22242-5160 by using the Standardization Document Improvement Proposal
(DD Form 1426) appearing at the end of this document or by letter.
AMSC N/A
FSC 5330
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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