Helium Liquefier (QT) System at NM4

Operational Settings: QT_Operational_Settings.pdf

Procedures

1. Shut Down and Restart Procedures
2. Filling LN2 on Purifier Dewar
3. QT System Starting Procedure
4. Liquefier Cleaning when Dewar contains LHe
5. Cleaning QT purifier Helium-space
6. Cleaning QT purifier LN2 space
7. What to do when cold-heads "blockage" warning appear?
8. LHe Dewar cleaning procedure
9. Cold-helium Circulation Procedure (Cooldown Transferline)

Useful information

1. The volume of an outside gHe tank: 1600 cubic feet
2. 100 slm rate on Magnet FC is equivalent to ~ 192 LHe liters per day (i.e. assuming both LQ A and B are running)
3. QT recommendation to keep system minimally pressurized: ~20 psi
4. Running from 40 psi down to 20 psi would produce about 80 liquid litters and we should be able to do that in about 10 hours
5. HR3.docx

To check LCW parameters: https://e906-gat1.fnal.gov/data-summary/e1039/slow-cont-acnet.php 
(click on NM4LCW or select F:NM4LCWFLOW F:NM4LCWP1 F:NM4LCWP2 F:NM4LCWP3 F:NM4LCWT1 F:NM4LCWT2 )

To check HMI parameters: https://e906-gat1.fnal.gov/data-summary/e1039/target-QT-HMI.php  (select:TI502 TI504 TI506 TI508 TI510 for both Liquefier A and B)

P&IDs
P504 HR3 P&ID 20191209 SSG.pdf
P504 P&ID (AO) Feb 26, 2020 -reprint.pdf

Manuals

1. Helium Compressor Manual.pdf
2. Cold_Head_Hot_Swap_Procedure.pdf
3. prosense_qps.pdf

Items-Purchased

1. https://www.automationdirect.com/adc/shopping/catalog/process_control_-a-_measurement/pressure_sensors/pressure_transmitters/spt25-20-v30d
2. https://www.automationdirect.com/adc/shopping/catalog/cables/pneumatic_solenoid_valve_cables_-a-_connectors_(square_din_style)/8mm_(din_43650c)/sc8-5t