Flowserve Cartridge Seals - Manual (Page 3)

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1.5 Check assembly drawing included with the cartridge seal for specific
seal design, materials of construction, dimensions, and piping
connections.
1.6 Check shaft or sleeve OD, seal housing bore, and distance to
the first obstruction to ensure they are dimensionally the same as
shown on the seal assembly drawing.
1.7 Check gland pilot and bolt holes to ensure they are adaptable to the
equipment and are the same as shown on the assembly drawing.
Many cartridge seal designs include setting devices that center the
seal around the shaft and do not require a gland pilot.
1.8 Handle all seal parts with care, they are manufactured to precise
tolerances. The rubbing contact faces of the rotating and stationary
faces are of special importance. These two sealing faces are lapped
flat to within three light bands (34.8 millionths of an inch).
Keep the seal faces perfectly clean at all times.
2 Cartridge Seal Installation
2.1 Lubricate the shaft or sleeve lightly with lubricant provided with
the seal.
2.2 Install the complete cartridge seal assembly on the shaft.
2.3 For overhung pumps: Position the seal close to the bearing housing
with the seal oriented toward the pump. Install the pump back-plate
or seal housing and assemble the pump.
2.4 Position the cartridge gland against the seal housing face and
tighten the gland stud nuts up evenly, cross staggering the
adjustment of the nuts. The gland nuts should be torqued to a
maximum of 13 N-m (10 ft-lbs). Excessive gland nut pressure can
result in distortion of the stationary face.
2.5 For between bearings pumps: Assemble the bearings, coupling,
etc. and adjust the impeller so that the shaft is in its operating axial
position.
2.6 For end suction pumps: Adjust the bearings, coupling, and impeller
so that the shaft is in its operating axial position.
2.7 Tighten the set screws on the seal cartridge drive collar.
Note Any subsequent axial adjustment of the shaft requires resetting of
the seal.