Stem connected to servo motor that stops and starts the flow of LN from the LN manifold to the graphite reactors.
| Bill Of Materials | Qty | Unit | Notes |
| FEP rod 250 | 55 | in | |
| labor assembly/fabrication (min) | 45 | min | |
| labor machining (min) | 75 | min | |
| LN valve stem | 16 | ea |
| Used on | Qty |
| nec inventory rack 3 | 5 |
| actuator LN valve | 1 |
| LN manifold upgrade | 1 |