Flowserve CPM Series User Manual

CPM Series

Dual, cartridge mounted, ﬂexible stator pusher seal designed for general service applications CPM PP

Installation

Instructions

Experience In Motion

Description

The CPM PP seal is a cartridge mounted mechanical seal, designed for ease of installation and reliable operation. No seal setting dimensions are required. Rotatable setting devices provide proper alignment. The

exible stator design compensates for inadvertent misalignment of the

seal chamber face. Multiple springs provide uniform face loading and

are external of the pumpage, resisting clogging or hang-up. Installation

according to the following steps will assure long trouble free life of the CPM PP seal.

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 in accordance with equipment

manufacturer’s instructions 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 packing area. Make sure the seal housing bore and face are clean and free of burrs.

1.4 Make sure the shaft or sleeve and the seal housing face are clean and free of burrs, cuts, dents, or corrosion that might cause

leakage past the sleeve gasket 19 and gland gasket O-ring 18 .

See Figure 1 & 2. Replace worn shaft or sleeve if it is worn in the sleeve packing area. Remove sharp edges from keyways and threads.

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.

Seal Chamber Requirements Figure 1

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

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

sleeve OD TIR

To first obstruction

μm (63 μinch) R finish or better

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

ANSI

1.5 Check equipment dimensions to ensure that they are within the dimensions shown in Figures 1 and 2. Critical dimensions include shaft or sleeve OD (A), a chamber depth of at least dimension (G),

minimum and maximum seal housing bore (C), and the minimum distance to the rst obstruction (K). See Figure 2.

1.6 Check gland bolting to ensure that bolt diameter (M) and bolt circle diameter (L) conform to the dimensions shown in Figure 2.

1.7 Handle the CPM PP with care, it is manufactured to precise tolerances. The sealing faces consisting of 14 and 14.1 and rotor parts 15 and 15.1 are of special importance. They are lapped at

to within three light bands (34.8 millionths of an inch). Keep the

seal faces perfectly clean at all times.

CPM PP Dimensional Data (inches) for standard bore seal chambers

Figure 2

G K

19 15 14 18 14.1 15.1 57 103 40

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