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Sumitomo F50 Compressor Manual -

The Sumitomo F-50 (including variants like the , , and F-50SH) is a mid-size, water-cooled, three-phase helium compressor designed to power cryogenic cold heads and pulse tubes. 1. Technical Specifications

  • F50L – Standard low-noise
  • F50M – Mid-pressure
  • F50H – High-pressure
  • F50R – Refrigeration (if it’s a chiller compressor)
  1. Close the condensate drain valves.
  2. Turn on the power supply (MCCB).
  3. Press the [START] button on the controller.
  4. The compressor will begin an auto-check; the "Unloading" light should illuminate.
  5. After a few seconds, the intake valve will open, and the compressor will transition to the "Loading" state, building pressure.

1. Identifying Your Unit

Before proceeding, confirm which type of F50 you have, as manuals differ significantly: sumitomo f50 compressor manual

Conclusion

4. Common F50 Problems Not Always in the Manual (From field experience)

  • Oil carryover → Usually failed separator element (part # SHI-XXXX). Replace every 4000 hrs or annually.
  • High discharge temp (>105°C) → Low oil, clogged cooler, or bad thermostat valve (often inside the oil filter housing).
  • No start / E-stop active → Check emergency button on the control panel door – it gets bumped often.
  • Pressure won’t build → Unloader piston stuck (inside the inlet valve). Manual doesn’t show rebuild; search “Sumitomo F50 inlet valve repair” on YouTube.