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.

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COMMERCIAL ITEM DESCRIPTION VALVES, PRESSURE REGULATING, STEAM

[INCH-POUND] A-A-50558

June 3, 1996

SUPERSEDING MIL-V-16733D

3 January 1989

The General Services Administration has authorized the use of this commercial item description, for all federal agencies.

1.  SCOPE.  This 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 (kPa(gage)) to 10,343 kPa(gage)).  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.

2.  CLASSIFICATION.  The valves covered by this commercial item description will be of the following types, classes, and sizes, as specified (see 7.2):

Type I         - Direct operated, self-contained. Type II        - Pilot operated, self-contained.

Type III      - Direct operated, through external feeler pipe. Type IV      - Pilot operated, through external feeler pipe.

Type V        - Pilot operated, through a hydraulic pneumatic, or electric system.

Class 125    - 125 psig (862 kPa(gage)) Working Steam Pressure (WSP) at 450 degrees

Fahrenheit (°F) (232   Celsius (°C)).

Class 150    -  150 psig (1034 kPa(gage)) WSP at 450°F (232  C). Class 250    -  250 psig (1724 kPa(gage)) WSP at 450°F (232  C). Class 300    -  300 psig (2069 kPa(gage)) WSP at 500°F (260  C). Class 400    -  400 psig (2758 kPa(gage)) WSP at 750°F (399  C). Class 600    -  600 psig (4137 kPa(gage)) WSP at 750°F (399  C).

Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which may improve this document should be sent to: Commanding Officer (Code 156), Naval Construction Battalion Center, Port Hueneme, CA  93043-4301.

AMSC N/A                                                                                                                        FSC 4820

DISTRIBUTION STATEMENT A.  Approved for public release; distribution is unlimited.