Flowserve Cartridge Seals - Manual (Page 4)

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2.8 Disengage or remove setting devices. Eccentric washer or slotted
plate type setting devices should be repositioned clear of rotating
parts and locked to the gland in a neutral position. Centering type
devices cap screwed to the sleeve drive collar should be removed
and stored for future seal removal and repair. All setting device
types need to be reinstalled for resetting the seal when repositioning
the pump impeller.
2.9 See Operational Recommendations, paragraph 3 and 4, before
starting pump.
3 Operational Recommendations for Single
Cartridge Seal
3.1 Do not start up the equipment dry. Vent air from the casing of
the pump and the seal chamber before startup. Check the seal
assembly drawing for the recommended piping plan and follow any
special instructions. Plan 11 is a good default flush plan if none are
specified for horizontal pumps.
3.2 If the seal runs hot, check for proper seal setting, seal housing
dimensions, and check the bypass or flush line for obstructions.
Do not allow the equipment to run for any extended time if the seal
gets hot or squeals.