Specifications

Appendices 8200 Compressor
Appendix E: Flow Diagrams for 8200 Air-Cooled and Water-Cooled CompressorsInstalla-
8040353 Brooks Automation
6-12 Revision 108
Appendix E: Flow Diagrams for 8200 Air-Cooled and Water-Cooled Com-
pressors
Refer to Figure 6-5 on page 6-13 or Figure 6-6 on page 6-14 while reviewing this sub-
section.
Helium returning from the cold head enters the compressor, and a small quantity of
oil is injected into the gas stream, thereby overcoming helium low specific head and
inability to carry heat produced during compression. Helium is then compressed and
passed through a heat exchanger for removal of compression-caused heat. The helium
flows through a bulk oil separator, oil-mist separator, and helium filter cartridge,
where oil and contaminants are removed.
A differential pressure relief valve in the compressor limits the operating pressure dif-
ferential between the helium supply and return lines, thereby allowing compressor
operating without cold head operation. When cold head operation reaches a steady-
state condition, further pressure regulation is unnecessary.