Watson-Marlow PD40 User Manual

Pulsation damper series

PD/40, PD/65 and PD/100

Manual

ORIGINAL INSTRUCTIONS

© 2013 Watson-Marlow Bredel B.V.
All rights reserved.
The information provided herein may not be reproduced and/or published in any form, by print, photo

print, microfilm or any other means whatsoever (electronically or mechanically) without the prior
written authorization of Watson-Marlow Bredel B.V.

The information provided can be changed without prior notification. Watson-Marlow Bredel B.V. or
one of its representatives cannot be held liable for possible damage resulting from use of this manual.
This is an extensive limitation of the liability which applies to all damage, inclusive of (without
limitation) compensating, direct, indirect or consequential damage, loss of data, income or profit, loss
or damage to possessions and claims of third parties.

Watson-Marlow Bredel B.V. provides the information in this manual “as is” and does not take any
responsibility and does not give any guarantee on this manual or its content. Watson-Marlow Bredel
B.V. rejects all responsibilities and guarantees. Furthermore, Watson-Marlow Bredel B.V. does not
take responsibility for and does not guarantee that information in this manual is accurate, complete or
up to date.

Names, trade names, brands, etc. used by Watson-Marlow Bredel B.V. may not, as per the legislation
concerning the protection of trade names, be considered as available.

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CONTENTS

CONTENTS ......................................................................................................................................... 3

1 GENERAL .................................................................................................................................. 4

1.1 How to use this manual ...................................................................................................... 4

1.2 Original instructions ........................................................................................................... 4

1.3 Service and support ........................................................................................................... 4

1.4 Environment and disposal of waste.................................................................................... 4

2 SAFETY ..................................................................................................................................... 5

2.1 Symbols ............................................................................................................................. 5

2.2 Intended use ...................................................................................................................... 5

2.3 Compliance Pressure Equipment Directive ........................................................................ 5

2.4 Use In Potentially Explosive Environments (ATEX) ............................................................ 5

2.5 Responsibility .................................................................................................................... 6

2.6 Qualification of the user ..................................................................................................... 6

2.7 Regulations and instructions .............................................................................................. 6

3 WARRANTY CONDITIONS ........................................................................................................ 7

4 DESCRIPTION ........................................................................................................................... 8

4.1 Identification of the product ................................................................................................ 8

4.2 Operation of the pulsation damper ..................................................................................... 8

4.3 Pulsation damper hose ...................................................................................................... 9

4.4 Pulsation damper selection .............................................................................................. 10

5 INSTALLATION AND COMMISSIONING ................................................................................ 11

5.1 Unpacking ........................................................................................................................ 11

5.2 Inspection ........................................................................................................................ 11

5.3 Installation conditions ...................................................................................................... 11

5.3.1 Ambient conditions ............................................................................................... 11

5.3.2 Set-up .................................................................................................................. 11

5.4 Lifting and moving the pulsation damper .......................................................................... 12

5.5 Setting the pulsation damper pressure level for operation ................................................ 12

6 MAINTENANCE ....................................................................................................................... 14

6.1 Cleaning the pulsation damper hose internally ................................................................. 14

6.2 Removing the pulsation damper hose .............................................................................. 14

6.3 Replacing the pulsation damper hose .............................................................................. 15

6.4 Checking the Pressure relief valve ................................................................................... 16

7 TROUBLESHOOTING ............................................................................................................. 17

8 SPECIFICATIONS .................................................................................................................... 18

8.1 General information ......................................................................................................... 18

8.2 Torque values .................................................................................................................. 18

8.3 Weights ........................................................................................................................... 19

8.4 Dimensions ...................................................................................................................... 19

8.5 Spares list ........................................................................................................................ 20

1.2 Surface treatment ............................................................................................................ 21

9 EC DECLARATION OF CONFORMITY ................................................................................... 22

10 SAFETY FORM ........................................................................................................................ 23

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1 GENERAL

1.1 How to use this manual

This manual is intended as a reference book by means of which qualified users are able to install,
commission, operate and maintain the pulsation dampers mentioned on the front cover.

1.2 Original instructions

The original instructions for this manual have been written in English. Other language versions of this
manual are a translation of the original instructions.

1.3 Service and support

For information with respect to specific adjustments, installation, maintenance or repair jobs which fall
beyond the scope of this manual, contact your Bredel representative. Make sure you have the
following information at hand:

• serial number pulsation damper

• type number pulsation damper

You will find this data on the identification plate of the pulsation damper (see paragraph

4.1 Identification of the product).

1.4 Environment and disposal of waste

Enquire within your local government about the possibilities for reuse or environment friendly
processing of packaging materials, (contaminated) lubricant and oil.

Always observe the local rules and regulations with respect to processing (non-reusable)
parts of the pulsation damper.

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2 SAFETY

WARNING

CAUTION

2.1 Symbols

In this manual the following symbols are used:

Procedures which, if not carried out with the necessary care, may result
in serious damage to the pulsation damper or in serious bodily harm.

Procedures which, if not carried out with the necessary care, may result
in serious damage to the pulsation damper, the surrounding area or the
environment.

Remarks, suggestions and advice.

Procedures, remarks, suggestions or advise which refer to use in
potentially explosive atmospheres (ATEX) in accordance with European
guideline 94/9/EC.

2.2 Intended use

The pulsation damper is exclusively designed for the damping of pulses on the discharge side of a
Bredel hose pump. After consultation with your Bredel representative, and only on certain conditions,
the pulsation damper may be used as a pressure relief valve. Every other or further use is not in
conformance with the intended use1. The manufacturer cannot be held responsible for any damage or
harm resulting from this. The pulsation damper is designed in conformance with the current European
standards and directives. Only use the pulsation damper in conformance with the intended use
described above. If you want to change the application of your pulsation damper, contact your Bredel
representative first.

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The “intended use” as laid down in EN 292-1 is “…the use for which the technical product is intended in accordance with
the specifications of the manufacturer, inclusive of his indications in the sales brochure”. In case of doubt it is the use
which appears to be its intended use judging from the construction, execution and function of the product. Observing the
instructions in the user’s documentation also belongs to intended use.

2.3 Compliance Pressure Equipment Directive

The pulsation dampers as mentioned on the front cover are in full compliance with the European
Pressure Equipment Directive 97/23/EC.

2.4 Use In Potentially Explosive Environments (ATEX)

The pulsation dampers PD/40, PD/65 and PD/100 can be used in a potentially explosive atmosphere
(ATEX). The pulsation damper is not classed as ATEX equipment since it contains no ignition source
from its own. It is considered as part of the pump and the ATEX code for the pump is applicable,
meaning it can operate under the same ATEX environment as the pump it is attached to. In general
this means the damper is suitable for Group II, category 2 and temperature class T4.

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WARNING

WARNING

When operating under ATEX pay extra attention to the following:

• Pulsation Damper to be installed, operated and maintained according this manual (see chapter
8 SPECIFICATIONS).

• Make sure the damper is connected to the earth. In general this is the case when the damper is
connected to the pump and the piping system. By construction all parts are electrically connected.
This can be checked by measuring the electrical resistance to the earth. The electrical resistance
to any ground connection should be less than 1 MOhm.

In case it is not possible to create an earth/ground connection with less
than 1 MOhm, one should make an additional PE (protective earth)
connection to the pulsation damper. (see chapter 5 INSTALLATION
AND COMMIsSIONING).

2.5 Responsibility

The manufacturer does not accept any responsibility for damage or harm caused by not (strictly)
observing the safety regulations and instructions in this manual or by negligence during installation,
use, maintenance and repair of the pulsation dampers mentioned on the front cover. Depending on
the specific working conditions or accessories used, additional safety instructions can be required.
Immediately contact your Bredel representative, if you notice a potential danger while using your
pulsation damper.

The user of the pulsation damper is always fully responsible for
observing the local valid safety regulations and directives. Observe
these safety regulations and directives when using the pulsation
damper.

2.6 Qualification of the user

The installation, operation and maintenance of the pulsation damper should be carried out by well
trained and qualified users. Temporary staff and persons in training may only use the pulsation
damper under the supervision and responsibility of well trained and qualified users.

2.7 Regulations and instructions

• Everyone who works with the pulsation damper must be aware of the content of this manual and

observe the instructions with great care.

• Never change the order of the actions to be carried out.

• Always store the manual near the pulsation damper.

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3 WARRANTY CONDITIONS

The manufacturer offers a two year warranty on all parts of the pulsation damper. This means that all
parts will be repaired or replaced free of charge with the exception of consumables, such as hoses
and seals, or parts which have been misused or have been intentionally damaged. If parts are used
that are not Watson-Marlow Bredel B.V. (hereafter called Bredel) parts, every warranty becomes void.

Damaged parts which are covered by the applicable warranty conditions can be returned to the
manufacturer. The parts must be accompanied by a fully filled in and signed safety form, as present in
the back of this manual. The safety form must be applied to the outside of the shipping carton. Parts
which have been contaminated or which have been corroded by chemicals or other substances which
can pose a health risk, must be cleaned before they are returned to the manufacturer. Furthermore, it
should be indicated on the safety form which specific cleaning procedure has been followed, and it
should be indicated that the equipment has been decontaminated. The safety form is required at all
items, even if the parts have not been used.

Warranties purporting to be on behalf of Bredel B.V. made by any person, including representatives of
Bredel, its subsidiaries, or its distributors, which do not accord with the terms of this warranty shall not
be binding upon Bredel unless expressly approved in writing by a Director or Manager of Bredel.

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4 DESCRIPTION

4.1 Identification of the product

The pulsation damper and pulsation damper hose can be identified by the contents of the
identification plate on the pulsation damper housing and the hose label.
The identification plate of the pulsation damper contains the following information, relevant for
identification:

A. Type
B. Serial number
C. Identification number of Notified

Body (PD/65 and PD/100 only)

D. Year of manufacture

The hose label on the pulsation damper hose contains following information:

A. Re-order number
B. Internal diameter
C. Type of material of inner liner
D. Maximum permissible working pressure
E. Production code

4.2 Operation of the pulsation damper

The Bredel pulsation damper reduces the pulses created in the discharge line by the hose pump. This
is achieved by means of a thick-walled, reinforced rubber hose which is mounted in a carbon steel,
cylindrical pressure vessel. The hose is surrounded by compressed gas (air or nitrogen).

Pulses are created when a pressing shoe leaves the pump hose, while rotating. Instantly the volume
in the discharge line will increase with the volume of the pressing shoe. This will result in a pressure
drop in the discharge line.

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