ASTM F1793-97(2021)

Die Annotation des Normtextes ASTM F1793-97(2021) :

This specification covers self-contained automatic shutoff valves (also known as excess flow valves) for air or nitrogen service. They are intended to be installed as safety devices to quickly and automatically shut off flow under certain excess flow conditions caused by a downstream failure or casualty, such as a hose rupture. Automatic shut-off valves shall be of the following types, styles, sizes, pressure ratings, and end connections: Types I and II; Styles 1 and 2. Each automatic shut-off valve must pass the following tests: visual examination; hydrostatic shell test; seal tightness test; external leakage test; and set-point test.


Keywords:
air, excessive flow valve (EFV), nitrogen, valve,, ICS Number Code 23.060.01 (Valves in general)