VALVE NORMALLY OPEN
A class with identifier
http://staging4.data.posccaesar.org/iso/15926-4/rdl/RDS313919
| Definition | A <VALVE NORMALLY OPEN> is an <ARTEFACT> and a <VALVE> with a <NORMALLY OPEN> <Status>, that is normally in an <OPEN> position | 
| ISO number | 23412 | 
| RDS number | RDS313919 | 
| Source | NORSOK CAD symbol libraries, Z-CR-004, draft 3, October 1996. (IVA128.) | 
| Valve Classes |