Flowserve Cartridge Seals User Manual

Cartridge Seals

Installation

Instructions

Experience In Motion

1 Equipment Check

1.1 Follow plant safety regulations prior to equipment disassembly:

• lock out motor and valves.

• wear designated personal safety equipment.

• relieve any pressure in the system.

• consult plant MSDS les for hazardous material regulations.

1.2 Disassemble equipment to allow access to seal installation area.

1.3 Remove all burrs and sharp edges from the shaft or sleeve
including sharp edges of keyways and threads. Replace shaft or
sleeve if it is worn in the sleeve gasket area. Make sure the seal
housing bore and face are clean and free of burrs.

1.4 Check requirements for shaft, sleeve, and seal housing.
See Figure 1.

Seal Chamber Requirements Figure 1

To first obstruction

Face of seal housing to be square to the
axis of the shaft to within 0.0005 mm/mm
(0.0005 inch/inch) of seal chamber bore TIR
and have a 1.6

μm (63 μinch) R finish or better

a

Gland pilot can be at either of these
register locations, concentric to within

0.125 mm (0.005 inch) of shaft or

Seal housing bore to have 3.2 μm
(125 μinch) R finish or better

Sleeve or shaft finish to be

0.8 μm (32 μinch) R or better

• Bearings must be in good condition

• Maximum lateral or axial movement of shaft (end play) = 0.25 mm (0.010 inch) TIR

• Maximum shaft runout at face of seal housing = 0.05 mm (0.002 inch) TIR

• Maximum dynamic shaft deflection at seal housing = 0.05 mm (0.002 inch) TIR

a

Scribe

Mark B

a

The images of parts shown in these instructions may differ visually from the actual
parts due to manufacturing processes that do not affect the part function or quality.

sleeve OD TIR

Scribe
Mark A

Shaft or sleeve OD
+0.000 mm (+0.000 inch)

-0.050 mm (-0.002 inch)

+0.000 mm (+0.000 inch) API 610/682

-0.025 mm (-0.001 inch) DIN/ISO

2

ANSI

1.5 Check assembly drawing included with the cartridge seal for specic
seal design, materials of construction, dimensions, and piping
connections.

1.6 Check shaft or sleeve OD, seal housing bore, and distance to
the rst 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
at 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.

3