Flowserve U s BW Seals User Manual

BW Seals® U Series

Balanced Pusher Seal
U, UC, UO, UCQ, UOP, UOPQ, UZ

Installation

Instructions

Experience In Motion

1 Equipment Check

1.1 Follow plant safety regulations:

• 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 Adjust the bearings, coupling, and impeller so that the shaft is in its operating

axial position. Disassemble equipment to allow access to seal installation

area.

1.3 Remove all burrs and sharp edges from the shaft, sleeve, seal housing bore

and face, keyways, and any other feature that may contact sealing gaskets.

Replace worn components. Clean all piping plans.

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

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

a

a

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

a

ANSI

1.5 Check assembly drawing included with the seal for equipment dimensions,

seal design, materials of construction, and piping connections.

1.6 Measure all diameters and distances to ensure they are dimensionally the

same as shown on the seal assembly drawing.

1.7 Handle all seal parts with care, they are manufactured to precise tolerances.

The seal faces are of special importance and should be kept perfectly clean.

2 Mechanical Seal Installation

2.1 Review seal assembly drawing, seal assembly, and equipment prior to

installation. Read all notes on the seal assembly drawing. For hook sleeve designs,

conrm the seal setting length shown on the assembly drawing matches the

equipment. See Figure 1.

2

2.3 Lightly lubricate external gaskets with a lubricant compatible with both handled

product and gasket material. Generally, silicon grease is suitable.

2.4 Install the seal onto the shaft and locate it against the face of the seal chamber.

If applicable, ensure the sleeve is aligned with drive features on the shaft.

2.5 Orient the ports on the seal gland(s) as indicated by the seal assembly drawing

and connected piping.

2.6 Evenly torque gland bolts/nuts for uniform gland pressure against the seal

chamber. On cartridge seals, do not yet tighten drive collar screws.

2.7 Complete the remaining equipment assembly including bearings, if applicable.

2.8 On cartridge seals, evenly tighten drive collar screws.

2.9 Disengage setting plates from the sleeve and secure in disengaged position.

2.10 Inspect equipment and driver alignment in accordance with coupling and/or

equipment manufacturer’s instructions.

2.11 After bringing the equipment up to operating conditions, recheck alignment

and make adjustments as necessary.

Installed Cartridge Seal Assembly Figure 2

3 Piping Instructions

3.1 Refer to the seal assembly drawing for recommended seal piping plans.

If auxiliary systems are required, follow all installation and operating instructions

provided with these systems.

3.2 Minimize restrictions, total tubing length and number of bends especially in closed

loop systems. Unless otherwise specied, the minimum internal diameter for tubing

and connecting hardware should be 19 mm (0.750 inch).

3.3 Do not start the equipment dry. Vent the equipment, seal chamber, and all

piping systems then startup support systems before starting equipment.

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.

3

TO REORDER REFER TO

flowserve.com

B/M #
F.O.

4 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 Da ta 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.

FIS114eng REV 05/15 Printed in USA

To find your local Flowserve representative

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

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.

© 2013 Flowserve Corporation

USA and Canada

Kalamazoo, Michigan USA

Telephone: [phone]

Telefax: 1 269 382 8726

Europe, Middle East, Africa

Roosendaal, the Netherlands

Telephone: [phone]

Telefax: 31 165 554590

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Singapore

Telephone: [phone]

Telefax: 65 6214 0541

Latin America

Mexico City

Telephone: [phone]

Telefax: 52 55 5567 4224