A-A-50558 Valves, Pressure Regulating, Steam No S/S DocumentThis commercial item description covers steam pressure regulating valves that transform steam from a specified initial pressure to a specified final reduced discharge pressure or range of pressures. The specified inlet steam pressures range from 15 pounds per square inch gage psig to 1,500 psig 103 kiloPascals gage kPagage to 10,343 kPagage. The steam pressure regulating valves covered by this commercial item description are intended for transforming steam from a specified initial pressure to a specified final reduced discharge pressure or range of pressures in steam systems.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8

A-A-50558

7.  NOTES.

7.1  Source of documents.

7.1.1  Copies of specifications and standards required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.

7.1.2  ASTM Standards are available from American Society for Testing and Materials, 1916

Race  Street, Philadelphia, PA  19103.

7.1.3  ANSI Standards are available from American Standards Institute, Inc., 1430 Broadway, New York, NY  10018.

7.1.4  The Federal Acquisition Regulation (FAR) may be obtained from the Superintendent of

Documents, U.S. Government Printing Office, Washington, DC  20402.

7.2  Ordering data.  Acquisition documents should specify the following:

a.   Title, number, and date of this specification. b.   Type, class and size required (see 2.).

c.   When valves require removal from the line for replacement of parts are acceptable (see

3.1).

d.   Type of end connection required (see 3.4).

e.   Whether single or double-seated (see 3.5.1).

f.    When double-seated valves designed to reverse inner valve action without use of additional parts is not required (see 3.5.1).

g.   Valve trim, if other than specified (see 3.5.2).

h.   Whether valve should close or open in the event of pressure failure of the operating medium (see 3.5.2).

i.    Type of control pilot for type V valve (see 3.5.3). J.    Type of operator (see 3.5.4).

k.   Type of loading means (see 3.5.5).

l.    Type of operational requirement (see 3.6).

m.  When accuracy of regulation for small flow valves should be different (see 3.6.1). n.   Operating range, if other than specified (see 3.6.3).

o.   Level of preservation, packing and marking required (see 6.).

7.3  Part Identification Number (PIN).  The following part identification numbering procedure is for government purposes and does not constitute a requirement for the contractor.  The PIN used for units acquired to this description will be assigned as follows:

6