This manual introduces the use of Sumitomo F-70 helium compressor, including instructions for use, maintenance and troubleshooting.
This manual is a reference guide for operators and service technicians of the Sumitomo F-70 Helium Compressor series (F-70H, F-70L, F-70LP). It includes technical instructions, specifications, safety precautions, and procedures for charging and operating the compressor.
Key operational details cover pressure limits, cooling‑water requirements, noise level expectations, and the ability to run up to two cold heads. Safety notes emphasize closing the vent valve when pressure drops and refilling helium at low pressure conditions.
| Minimum operating pressure for helium refill | 1.60 MPa (232 psig) |
|---|---|
| Vent valve closure pressure range | 35–70 kPa (5–10 psig) |
| Maximum noise level | exceeds 70 dBA |
| Maximum number of cold heads operable | 2 |
Close the vent valve when the pressure drops to that range.
Helium should be refilled if the gauge reads less than 1.60 MPa (232 psig).
The compressor can operate up to two cold heads simultaneously.