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| Valve | State |
|---|---|
| Vliq1 | Open |
| V19 | Closed |
| Vliq2 | Closed |
| V18 | This is a 3-way hand valve: position→ gas flow downwards |
| VEVAC | Close |
| V30 | Open |
| V35 | Open |
| VP | Close |
| V36 | Close |
| REGP | Open (fully) |
| V11 | Open |
| Vs4 | Close |
| Vfill | Close |
| Vmup | Close |
| V17 | Close |
| V14 | Open |
| NV2 | Close |
| SVPD | Always open (relay was taken out) |
| V12 | Close |
| V13 | Close |
| VDepr | Close |
| FI01 | Completely Opened |
| FI02 | Open (somewhere in the middle) |
| FI03 | Completely Closed |
| MV101-He | Open (from tank) |
| MV1020-He | Open (to tank) |
| MV103-He | Close |
The MV1 VM1 valve which is a red box in the back of HR3 will start blinking and close the main recovery path and then it forces helium gas through REG4 (making the horn sound). Closing this valve increases the pressure in the recovery manifold so that PC1 with a spike (usually just to 2 psi or so but less than 4 psi). Building pressure in this space pushes helium to the buffer tank through REG4 and REG3.
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When we actually started trying to liquefy HR3 started running normally on its own. There may or may not be a correlation.
Information about some 'key' (or major) valves on the top part of HR3
VM1 has two operational configurations:
1. Manual: Adjust the hand valve in the bottom to open/close
2. Auto: Automatic control with the inputs from PC1 and PSW4.
REG4: According to the P&ID this valve regulates a flow
Kaeser Compressor
Kaeser Compressor Display (Click this link to see images)
Kaeser Compressor Maintenance
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