Experience in and Prospects for Using Flow Meters Based on Orifice Devices in the Cryogenic Supply System of the NICA Accelerator Complex

The gas flow rate through the cryogenic supply systems of the NICA accelerator complex is a parameter whose measurement plays a decisive role in the operation and maintenance of equipment and in the optimization of the technological process. Monitoring the measurement of compressed helium flow rate through the MO-800 adsorber of oil purification and drying units makes it possible to track the time of production of the adsorbent’s protective effect and replace it in a timely manner. A technique for selecting a diaphragm-type flow meter and measuring the flow through it for the MO-800 No. 4 oil purification and drying unit. A diaphragm with control and measuring instruments was installed on the compressed helium outlet line from the unit in February 2024. In April 2024, a software package for measuring flow, monitoring the residual amount of adsorbent, and promptly informing the operator was developed and implemented as part of the MO‑800 No. 4 automated process control system. Possible applications of diaphragms for measuring the performance of compressor equipment and the refrigeration capacity of cryogenic installations is also examined.