Flowserve Machinery Components User Manual
USER INSTRUCTIONS
-Original Instruction-
General Installation and Maintenance Instructions
for Machinery Components
These installation instructions can be used for the following seal types:
Pusher seals: Allpac 4 series, Allpac N series, Centipac 1 series, CRO, D series, DHT
series, Europac 306, Europac 6 series, FRO, GSD, GSL, HD series, HSC,
HSH, LD, P series, Q series, RO, Simpac 3 series, SRO, U series, UHT
series.
Bellows seals: BRC series, BX series, BXH series, BXLS series, BXRH, CBR series, CBS,
GSDH, PBR, PBS, X series.
Table of Contents page no.
1. Drawing, Brief Description, Explosion Protection, Function of a Mechanical Seal ......2
2. Safety ...............................................................3
3. General ..............................................................4
4. Transport, Storage ......................................................5
5. Equipment Check .......................................................5
6. Mechanical Seal Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.1 Installation of Cartridge Type Seal with Setting Plates........................8
6.2 Installation of a Cartridge Type Seal with Centring Tabs ......................9
6.3 Installation of a Component Type Seal...................................10
6.4 Installation of Seals with Hooked Type Sleeves ............................11
7. Piping Instructions .....................................................12
8. Performance Testing of Pumps ...........................................12
9. Functional Recommendations.............................................13
10. Shut Down, Disassembly ................................................14
11. System Check ........................................................15
12. Spare Parts, Repair.....................................................15
Experience In Motion
1. Drawing, Brief Description, Explosion Protection, Functional Requirements
This mechanical seal is designed to provide reliable performance under a wide range
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of operating conditions. The information and specifications presented in this product
brochure are believed to be accurate, but are supplied for information 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, with respect to the product.
Although Flowserve Corporation can provide general application guidelines,
it cannot provide specific information for all possible applications.
The purchaser/user must therefore assume the ultimate responsibility for the proper
selection, installation, operation and maintenance of Flowserve products. Because
Flowserve Corporation is continually improving and upgrading its product design,
the specifications, dimensions and information contained herein are subject to
change without notice.
1.1 Assembly Drawing
The assembly drawing is included in the shipping box with the mechanical seal.
1.2 Brief Description
A mechanical seal is a device designed to seal a rotating shaft against a stationary hou-
sing, e.g. a pump shaft against a pump casing. The stationary components will consist
of a seal ring and (depending on the design) a springloaded element. The spring-loaded
element can be a spring or a bellows. The seal ring is sealed against the housing with a
secondary gasket, e.g. an O-ring. The rotating components will consist of a seal ring and
(depending on the design) a spring-loaded element.
The spring-loaded element can be a spring or a bellows. The seal ring is sealed against
the shaft with a secondary gasket, e.g. an O-ring.
A mechanical seal can be supplied as a pre-assembled cartridge or in separate compon-
ents. Assembly is done in accordance with the assembly drawing. A mechanical seal will
run in the pumped product or external source fluid. Liquid seals must always have a film
of liquid present between the seal faces. Gas seals must always have a film of gas present between the seal faces. The sealing surfaces are separated from each other by a
fluid film (liquid or gas) during shaft rotation and in principle run without contact and
thus minimal wear under these conditions.
1.3 Explosion Protection
The mechanical seal is regarded as a machine element. Machine elements do not need
to comply with Directive 94/9/EC (ATEX 95 product guide) as these are regarded as an
integral part of a larger piece of machinery (pump, agitator). This has been confirmed
by both the EC ATEX standing committee as well as the European Sealing Association
(ESA). Reference is made to following web-sites:
EC ATEX standing committee: http://ec.europa.eu/enterprise/atex/rotating.htm
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© Copyright 2009 Flowserve Corporation
General Installation and Maintenance Instructions for Machinery Components
ESA position statement: http://www.europeansealing.com/statements.html
For applications which require information on expected surface temperatures of
the mechanical seal faces, Flowserve document “ATEX 137 information declaration”
is available upon request. This document allows users to determine typical surface
temperatures based upon seal design, operating conditions and face materials and
may be used by the users to comply with ATEX 1999/92/EC (ATEX 137).
1.4 Functional requirements
The proper functioning of a mechanical seal is only achieved once the following
conditions have been met:
• Thesealingsurfacesarelappedwithinspecification.
• Perpendicularityandconcentricitybetweentheshaftandthesealchamberface
and bore respectively
• Freedomofmovementofthespringloadedcomponentsinaxialdirection
• AxialandradialshaftmovementswithinFlowserveorOEMtoleranceswhichever
is the tightest.
• Thesealisusedundertheconditionsforwhichitwasselected.
• Theequipmentinwhichtheseal(s)is(are)installedisoperatedwithinnormal
parameters (no cavitation, excess vibration etc.)
• Preventionofsedimentationonshaftorsleevesurfacescausedbyforinstance
crystallisation or polymerisation
• Permanentliquidorgasfilmbetweenthesealingsurfaces,dependingonsealtype.
Failure to meet these requirements will result in excessive leakage and / or shortened seal life
and may result in high component and surface temperatures (see the directive 94/9/EC,
1999/92/EC and EN 13463-5).
2. Safety
DANGER:
This means that personal danger or major material damage can occur when no attention
is paid to this.
ATTENTION:
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This means that important information is pointed out that may also be overlooked by skilled
personnel. The information can be important to avoid personal injury or material damage.
Please read these instructions carefully. Installation in accordance with the following instructions will contribute to long and trouble free running of the mechanical seal. For related mechanical seal auxiliary equipment (reservoirs, coolers, etc.), separate instructions will be provided.
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The ultimate user must ensure that personnel assigned to handle, install and run the mechanical
seal and related equipment is well acquainted with the design and operating requirements of
such equipment.
For this personnel it may be required to wear protective clothing as per the plant’s
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safety regulations.
Damage to any of the seal components and in particular the faces may cause (excessive) leakage in liquid or gas form. The degree of hazard depends on the sealed product
and may have an effect on people and / or the environment. Components coming into
contact with leakage must be corrosion resistant or suitably protected. Normal seal
leakage should not result in the formation of an explosive mixture. Plant regulations
concerning work safety, accident prevention and pollution must be strictly adhered to.
This mechanical seal has been designed and built to seal rotating equipment. Damages resulting
from use in other applications are the responsibility of the user.
Failure, recovery or fluctuation in power supply to the machine and/or supply system
may not expose persons or environment to dangerous situations or harm the
functionality of the mechanical seal.
Guards that are provided by the equipment manufacturer have to be in accordance with
plant regulations, but should not create additional danger. These guards have to ensure
proper access to the working area required for maintenance to the mechanical seal.
The electricity supply of the equipment must be in accordance with directive 2006/95/EC.
When machinery is powered by a source of energy other than electricity this may not
cause dangerous situations for persons and environment.
3. General
All illustrations and details in these installation and maintenance instructions are subject to
changes that are necessary to improve product performance without prior notice.
The copyright of these instructions is the property of Flowserve. These instructions are intended
for Maintenance, Operating and Supervisory personnel and contain regulations and drawings
of a technical character that may not, in full or in part, be copied, distributed, or used without
authorisation for competitive purposes, or given to others.
It should be understood that Flowserve does not accept any liability for instances of
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damage and/or malfunctioning incurred through non-adherence to these installation
instructions.
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General Installation and Maintenance Instructions for Machinery Components
4. Transport, Storage
The mechanical seal and related equipment must be transported and stored in the unopened,
original shipping box. The warehouse in which the mechanical seals and related equipment are
stored must be dry and free of dust.
Avoid exposing equipment to large temperature fluctuations and radiation.
Parts or complete mechanical seals that have been dropped or otherwise have been subjected
to heavy impacts during transport must not be installed.
An inspection by Flowserve or its appointed representative is strongly advised.
After a storage period of 3 years the mechanical seal must be inspected for its “as new”
properties. This applies in particular to the seal faces and secondary sealing elements.
An inspection by Flowserve becomes necessary.
If the equipment is to be preserved with the mechanical seal(s) installed, the preserving
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medium must not impair the function of the mechanical seal by e.g. fouling of the seal
faces and/or attack the secondary seals.
The mechanical seal can in principle be transported with suitable means like lifting
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accessories.
5. Equipment Check
5.1 Follow plant safety regulations prior to equipment disassembly:
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5.1.1 Wear designated personal safety equipment
5.1.2 Isolate equipment and relieve any pressure in the system
5.1.3 Lock out equipment driver and valves
5.1.4 Consult plant Material Safety Data Sheet (MSDS) files for hazardous material
regulations
5.2 Disassemble equipment in accordance with the equipment manufacturer’s instructions
to allow access to seal installation area.
5.3 Remove existing sealing arrangement (mechanical seal or otherwise).
Clean seal chamber and shaft thoroughly.
5.4 Verify the shaft dimensions as shown on the seal assembly drawing. In spect surfaces
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under gaskets to ensure they are free from pits or scratches. Break all sharp corners
on shaft steps, threads, reliefs, shoulders, key ways, etc. over which gasket(s) must
pass and/or seal against.
5.5 Verify the seal chamber bore or OD pilot fit as shown on the seal assem bly drawing.
5.6 Check seal assembly drawings for any modifications (reworks) to be made to the
equipment for mechanical seal installation and act accordingly.
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