NAC455C.226. Capacity ratings of certain valves.

The capacity rating of:

     1. A safety valve that is designed primarily for use in steam or vapor service must be rated in pounds per hour.

     2. A relief valve that is designed primarily for use in liquid service must be rated in British thermal units per hour.

     3. A safety relief valve that is designed primarily for use in:

     (a) Steam or vapor service must be rated in pounds per hour.

     (b) Heated liquid service must be rated in British thermal units per hour.

     4. A cold water relief valve may be rated in gallons per hour.

     (Added to NAC by Div. of Industrial Relations by R101-02, eff. 12-15-2004)