Typically used to apply an anti-freezing fluid to the atmospheric side
of seals in services or atmospheric conditions below ( 32F).
Ice formation on the atmospheric side of seals can cause seal
damage during startup .The anti-freezing fluid displaces water that
may have collected about the seal .
Used primarily with singles seals in vertical pumps
May be used in cold climate offshore applications
May be used in chilled or cryogenic services
Reservoir is normally only open to the seal during equipment
commissioning and startups
Check level prior to startup .The isolation valve should be opened
prior to startup in order to flush out any collected water on the
atmospheric side of the seal .Flow from the reservoir should be
visually confirmed at the seal drive collar ,at the seal drain ,or by
monitoring the level gauge .Close isolation valve after the startup
sequence is completed to preserve anti-freezing fluid for future use .
If water or ice is observed collecting at the seal ,a flush from the
Plan 51 reservoir can be performed .