Flowserve CBR Series Installation Instructions Manual

Installation

Instructions

CBR Series

Single Inside Bellows Seal

flowserve.com

2

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 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 worn
shaft or sleeve. 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

1.5 Check assembly drawing included with the seal for specic

seal design, materials of construction, dimensions, and piping

connections.

1.6 Check shaft or sleeve OD, box bore, box depth, and distance

to rst obstruction to ensure that they are dimensionally the same
as shown on the seal assembly drawing.

To first obstruction

Seal housing face to have a surface finish
of 1.6 μm (63 μinch) R

a

finish or better

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

Scribe
Mark B

Seal housing bore to have 3.2 μm
(125

μ

inch)

Ra finish or better

ANSI

Sleeve or shaft finish to be

0.8 μm (32 μinch) R

a

or better.

Gland pilot can be at either
of these register locations.

3

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.

1.8 Handle all seal parts with care, they are manufactured to precise

tolerances. The seal faces; Seal Ring and Insert, 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 Installation

The basic CBR design is shown in Figure 2. Variations may include
rotating face gasket, seat gasket, and environmental control features.
See the Flowserve assembly drawing included with each complete seal
for details. Additional recommendations for vertical pumps are shown in

Section 3.

2.1 Scribe mark A, Figure 1, on the shaft or sleeve to line up with the

face of the seal housing. The shaft or sleeve must be in its nal
axial operating position with regard to the seal housing face before

mark A is scribed.

Basic CBR Figure 2

1.19

0.06

Set

Screw

Bellows
Adapter

Gasket

Gasket

Stationary

Face

Seat

Gasket

Gland

Bellows

Assembly

4

Determining the Correct Installed
Operating Length Dimension Figure 3

Metric Units

(Inch Units)

I

1

(R)

.750" thru 1.250" 1.38"

1.375" thru 2.375" 1.56"

2.500" thru 3.375" 1.75"

3.500" thru 4.750" 1.88"

5.000" 2.00"

5.500" .25"

CBR Bellows Assembly

Installed Length (R)

Seal Size

inch

18 thru 22 27.5 mm

24 thru 25 30.0 mm

28 thru 35 32.5 mm

38 thru 48 34.0 mm

50 thru 55 34.5 mm

58 thru 65 39.5 mm

68 37.2 mm

70 thru 75 44.7 mm

80 thru 85 44.3 mm

90 thru 100 49.3 mm

Seal Size

mm

CBR Bellows Assembly

Installed Length (l

1

)

Seal
Size

5

2.2 Scribe mark B, Figure 1, at the seal setting point shown on the

assembly drawing included with the seal. (This is the seal setting
dimension as measured from the face of the seal housing to the
back of the bellows drive collar. The back of the bellows drive collar
will be located at this point. See Figure 3 for the correct installed
operating length dimension l1 (R). This dimension can be used
to calculate the seal setting point B if no assembly drawing is

available.

2.3 Lightly lubricate the stationary face mounting O-ring with the silicone
lubricant provided with the seal and install the O-ring in the gland.

2.4 Lightly lubricate the stationary face gasket shoulder and carefully
press the face into the seat gasket O-ring in the gland. Use hand
pressure only. All standard CBR stationary faces are supplied with
holding pins. Locate the pin to engage the pin slot in the gland to
avoid over compressing the bellows assembly.

2.5 Install the gland with the stationary face over the shaft. Place the
gland as close to the bearing bracket as possible. Do not bump the
stationary face against the shaft as it may chip, crack, or break.

2.6 Lightly lubricate the shaft or sleeve lightly with silicone lubricant.

2.7 Lightly lubricate the Bellows adapter gasket O-ring with silicone
lubricant and install the O-ring in the bellows drive collar end

groove.

2.8 Install the CBR bellows assembly with the bellows rotating face
gasket O-ring in place onto the shaft or sleeve. Do not compress
the CBR bellows assembly more than the indicated working length
l1 (R) shown on the assembly drawing. Excessive compression may
destroy the capability of the seal to operate properly.

2.9 Set the back of the CBR bellows assembly at reference mark B,
Figure 1, and tighten set screws rmly and evenly. The rotating
bellows assembly is now in the proper position to provide the
correct setting and spring compression for nal assembly.

2.10 Wipe the seal faces clean with alcohol before completing equipment
assembly. Seal faces should not be lubricated, but should be left

clean and dry.

2.11 Assemble the pump.

6

2.12 Position the gland to the face of the seal housing. Be sure the gland
pilot is properly engaged. Tighten the gland stud nuts evenly, cross
stagger the adjustment of the nuts. Excessive gland bolt tightening
can result in distortion of the stationary face.

2.13 See section 4, Operational Recommendations, before starting

pump.

3 Vertical Pumps

3.1 Follow the above installation instructions except that (a) the
reference mark A must be established with the shaft, impeller(s),
and coupling in their nal running position and (b) the gland
assembly, Step 2.5, is installed after the bellows assembly is
installed, Step 2.10.

3.2 Any change in position of the shaft requires resetting of the seal.

3.3 Special attention must be taken to avoid trapping air in the seal
chamber. When the seal chamber pressure is below pump
discharge pressure, use Piping Plan 11, bypass line from pump
discharge to the gland ush tap to ensure sealing liquid at the seal
faces. When the seal chamber pressure is at pump discharge
pressure, use Piping Plan 13, bypass line from seal chamber to

pump suction.

3.4 See section 4, Operational Recommendations, before starting

pump.

4 Operational Recommendations

4.1 Do not start up the equipment dry. Vent air from the casing of the
pump and the seal chamber before startup. Circulate clean product
or a clean uid from an external source through the seal chamber
whenever the equipment is in operation, Piping Plan 11.

4.2 If the seal runs hot, check for proper seal setting, seal housing
dimensions, and check the bypass or ush line for obstructions.
Shut down the equipment immediately if the seal gets hot.

For special problems encountered during installation, contact your
nearest Flowserve Sales and Service Representative.

7

5 Repair

This product is a precision sealing device. The design and dimension
tolerances are critical to seal performance. Only parts supplied by
Flowserve should be used to repair a seal. To order replacement parts,
refer to the part code and B/M number. A spare backup seal should be

stocked to reduce repair time.

When seals are returned to Flowserve for repair, decontaminate the
seal assembly and include an order marked "Repair or Replace."
A signed certicate of decontamination must be attached. A Material
Safety Data Sheet (MSDS) must be enclosed for any product that

came in contact with the seal. The seal assembly will be inspected and,
if repairable, it will be rebuilt, tested, and returned.

flowserve.com

TO REORDER REFER TO
B/M #

F.O

.

To find your local Flowserve representative

and find out more about Flowserve Corporation,
visit www.flowserve.com

FIS117eng REV 09/2018 Printed in USA

Flowserve Corporation has established industry leadership in the design and manufacture of its products.
When properly selected, this Flowserve product is designed to perform its intended function safely during its
useful life. However, the purchaser or user of Flowserve products should be aware that Flowserve products
might be used in numerous applications under a wide variety of industrial service conditions. Although
Flowserve can provide general guidelines, it cannot provide specific data and warnings for all possible
applications. The purchaser/user must therefore assume the ultimate responsibility for the proper sizing
and selection, installation, operation, and maintenance of Flowserve products. The purchaser/user should
read and understand the Installation Instructions included with the product, and train its employees and
contractors in the safe use of Flowserve products in connection with the specific application.

While the information and specifications contained in this literature are believed to be accurate, they are
supplied for informative purposes only and should not be considered certified or as a guarantee of satisfactory
results by reliance thereon. Nothing contained herein is to be construed as a warranty or guarantee, express
or implied, regarding any matter with respect to this product. Because Flowserve is continually improving
and upgrading its product design, the specifications, dimensions and information contained herein are
subject to change without notice. Should any question arise concerning these provisions, the purchaser/
user should contact Flowserve Corporation at any one of its worldwide operations or offices.

© Flowserve Corporation (2012)

USA and Canada

Kalamazoo, Michigan USA

Telephone: [phone]

Telefax: 1 269 382 8726

Europe, Middle East, Africa

Etten-Leur, the Netherlands

Telephone: [phone]

Telefax: 31 765 028 487

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Singapore

Telephone: [phone]

Telefax: 65 6214 0541

Latin America

Mexico City

Telephone: [phone]

Telefax: 52 55 5567 4224