| Code | Description |
| RG | Gate valve |
| MOV | MOTOR OPERATED VALVE |
| RA | Globe valve |
| FCV | FLOW RATE CONTROL VALVE |
| FV | FLOW VALVE |
| LCV | LEVEL CONTROL VALVE |
| LDCV | LEVEL DIFFERENTIAL CONTROL VALVE |
| LV | LEVEL VALVE |
| PCV | PRESSURE CONTROL VALVE |
| PDCV | PRESSURE DIFFERENTIAL CONTROL VALVE |
| TCV | TEMPERATURE CONTROL VALVE |
| TDCV | TEMPERATURE DIFFERENTIAL CONTROL VALVE |
| TV | TEMPERATURE VALVE |
| PSV | PRESSURE SAFETY VALVE |
| PVSV | PRESSURE VACUUM SAFETY VALVE |
| US | HIPPS |
| UT | SSIV Module |
| SSSV | SUBSURFACE SAFETY VALVE |
| BDV | BLOW DOWN VALVE |
| ESDV | EMERGENCY SHUTDOWN VALVE |