Flowserve CPM Supply Tank - Manual (Page 6)

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8. It is highly recommended that the reservoir be flushed with clean
fluid prior to equipment start up to remove any foreign matter from
the system.
Caution: The CPM Seal Support Reservoir System is not for use with
hazardous materials.
9. Fill reservoir with water barrier fluid to the middle of the sight
glass. Gas volume of the system should be at least 25 percent of
the reservoir volume to allow for thermal expansion during opera-
tion.
10. Before starting the system, bleed all air from highest point in the
system, the vent valve.
11. Connect external water supply to reservoir on Plan 53 (dual seal). A
pressure regulator and check valve are required to maintain a
constant pressure on the system. The pressure in the reservoir
should be maintained at least 25 psi above the seal cavity pressure.
Make sure reservoir is filled before pressurizing.