Modified Bellow sealed valve with copper stem tip.
| Bill Of Materials | Qty | Unit | Notes |
| 4BSV gasket | 0.05 | ea | |
| bellows-sealed valve 1/4 | 1 | ea | |
| BSV vented Cu stem tip | 1 | ea | |
| labor assembly/fabrication (min) | 10 | min | |
| 4BSV with vacuum stem tip | 1 | ea |
| Used on | Qty |
| nec inventory rack 1 | 21 |
| 4BSV + actuator | 1 |