Watson-Marlow 900 User Manual

Publication PB 0188

Issue 2

Watson-Marlow high flow, high pressure pump

Installation and operating instructions

Pumphead/s: 919 Issue 1

925 Issue 1

940 Issue 1

945 Issue 1

900 series

Contents

Declarations .................................................... Page 2

Safety .................................................... Page 3

Information for returning pumps .................................................... Page 3

Two year warranty .................................................... Page 3

Recommended operating procedures ............................................. Page 4

Part 1: Installation

Siting .................................................... Page 5

Pump connections .................................................... Page 5

Electrical connection .................................................... Page 6

Powered tube removal .................................................... Page 7

Powered tube fitting .................................................... Page 8

Manual tube removal .................................................... Page 9

Manual tube fitting .................................................. Page 10

Shoe adjustment .................................................. Page 13

Part 2: Operation

Flow rates .................................................. Page 14

Part 3: Appendices

Spares .................................................. Page 16

Materials of construction .................................................. Page 18

Specification .................................................. Page 18

Outline drawing .................................................. Page 19

Declaration of
conformity

Declaration of
incorporation

Decontamination certificate .................................................. Page 20

Declarations

When a 900 series drive unit, fitted with the 900 series pumphead is used as
a stand alone pump it complies with:

Machinery Directive 89/392/EEC EN60204-1

Low Voltage Directive 73/23/EEC EN61010-1

EMC Directive 89/336/EEC EN50081-1/50082-1

Responsible person: A S Balding, Managing Director, Watson-Marlow Limited,
Falmouth, Cornwall TR11 4RU, England.

Telephone [phone] Fax [phone]

When the 900 series pumphead is to be installed into machines or assembled
with other machines for installations, it must not be put into service until the
relevant machinery has been declared in conformity with the provisions of the
machinery directive 89/392/EEC and EN60204-1.

Responsible person: A S Balding, Managing Director, Watson-Marlow Limited,
Falmouth, Cornwall TR11 4RU, England.

Telephone [phone] Fax [phone]

Page 2

Safety

In the interests of safety, this pump and the tubing selected should only be
used by competent, suitably trained personnel after they have read and
understood this manual, and considered any hazard involved.

Any person who is involved in the installation or maintenance of this
equipment should be fully competent to carry out the work. In the UK this
person should also be familiar with the Health and Safety at Work Act 1974.

Do not remove or open pumphead door whilst operating pump.

Do not place fingers inside pumphead.

Ensure the drive is inoperative before opening the pumphead door.

There are dangerous voltages (at mains potential) inside the motor. If access
is required, isolate the motor from the mains before removing the terminal box
cover.

Information for returning pumps

Any equipment which has been contaminated with, or exposed to, body fluids,
toxic chemicals or any other substance hazardous to health must be
decontaminated before it is returned to Watson-Marlow or its distributor.

A certificate (a suitable blank form is included at the rear of these operating
instructions), or signed statement, must be attached to the outside of the
shipping carton.

This certificate is required even if the pump is unused. If the pump has been
used, the fluids that have been in contact with the pump and the cleaning
procedure must be specified along with a statement that the equipment has
been decontaminated.

Two year warranty

Watson-Marlow Limited warrants, subject to the conditions below, through
either Watson-Marlow Limited, its subsidiaries, or its authorised distributors, to
repair or replace free of charge, including labour, any part of this product
which fails within two years of delivery of the product to the end user. Such
failure must have occurred because of defect in material or workmanship and
not as a result of operation of the product other than in accordance with the
instructions given in this manual.

Conditions of and specific exceptions to the above warranty are:

•

Consumable items such as tubing and glands are excluded.

•

Products must be returned by pre-arrangement carriage paid to Watson-

Marlow Limited, its subsidiaries, or its authorised distributor.

•

All repairs or modifications must have been made by Watson-Marlow

Limited, its subsidiaries, or its authorised distributors or with the express
permission of Watson-Marlow Limited, its subsidiaries, or its authorised
distributors.

•

Products which have been abused, misused, or subjected to malicious or

accidental damage or electrical surge are excluded.

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

Page 3

Recommended operating procedures

DO

keep delivery and suction lines as short as possible.

DO use the minimum number of bends in rigid pipe runs. If there must be a
bend, use a swept bend and not a tight elbow.

DO

use suction and delivery pipelines with a bore equal to or larger than the
bore of the tube fitted in the pumphead. When pumping
losses caused by increased friction can be overcome by using pipe runs with
a cross sectional area several times greater than the pumping element.

DO

run at a slow speed when pumping viscous fluids.

DO

keep the track and sliding shoe clean.

DO ensure that the correct type and volume of coolant/lubricant is used.

viscous

fluids, the

DO NOT

peristaltic pumps are self priming and will hold their prime up to several
metres, so there may be no need for non-return or foot valves, nor for the
loading valves required on many other kinds of pumps.

Any valves fitted must cause no restriction. If electrically actuated valves are
fitted, they should be interlocked so that the pump will only run when the
valves are open. Fit an automatic by-pass if manual valves are installed.

Explosion proof motors should not be used in an environment where an
explosive gas-air mixture is continuously present or present for long periods.

DO NOT

proof motor.

The temperature of any part or surface of an explosion proof motor must
always remain below the ignition temperature of the gas-air mixture it is
operating in.

The connector elbow located at the top of the pump head, enables the pump
head to be drained of lubricant or any other substance in the case of tube
failure.

If the motor/gearbox used with this 900 series pumphead is not
supplied directly by Watson-Marlow, it is important to refer to the
maintenance manual supplied with the specific motor/gearbox.

fit valves in the suction or delivery line without considering that

connect door switches or any other switch gear with an explosion

Page 4

Part 1: Installation

Siting

If the pump is to be lifted ensure that all standard rigging practices are
adhered to. This procedure should only be carried out by qualified
personnel only who are familiar with the Health and Safety at Work Act

1974.

The pump should be situated on a flat horizontal surface where there is free
air to circulate around it. Where the tubing is entering and leaving the
pumphead there should be least 1m of tube without a bend, a removable drop
out section to aid tube replacement, and if practical, this should be of a larger
diameter than the pump tubing.

Pump connections

It is recommended that for
maximum tube life, the pump
should always be set up with the
delivery end of the tubing
connected to the lower casing
port of the pumphead and
immersed in cooling lubricant.

This may require the pump head
to be re-fitted to the correct
orientation for operation.

Natural rubber

Nylon
Reinforcing

Natural rubber
Food grade natural rubber
Food grade nitrile rubber
Neoprene rubber
EPDM

Page 5

If the main pipe run to the pump
is rigid pipe work, there should
be a drop out section or flexible
pipe work to allow the pump
tubing to be inserted and
withdrawn.

For working pressures over 7 bar,
always fit an outlet pulsation
damper. Watson-Marlow, or its
representative, can supply
pulsation dampers and will assist
with determining the type
required for your application.

900 Series tubing is available in
the combinations seen left for a
range of process requirements.

Electrical connection

In order to effectively protect the motor from overloads, appropriate motor
protection devices must be used. Motors fitted to the Watson-Marlow series of
pumps are manufactured with a motor temperature cut-out, but a current
overload relay should also be fitted to a contact breaker.

The motor should be connected by a qualified engineer who is
conversant with the appropriate regulations and they should ensure that
the voltage and frequency of the electrical supply corresponds with the
data on the motor plate.

Connect the motor in accordance with the wiring diagram which will be found
in the motor terminal box.

When a motor thermal protection switch is fitted in the motor, the leads will be
found in the motor terminal box. They should be connected to stop the pump if
the switch operates. The switch will open circuit at an over temperature
condition.

The diagram below shows the connection of the drive motor showing possible
ancillary switches and protections. It depends on the installation whether a
reversing switch and interlock with other equipment is included.

Care must be taken to ensure that
the motor terminal links are in the
correct position and that all
connections including the earth
connection are positioned
correctly and securely.

Ingress protection standard will be
compromised if the connection
box cover is not properly replaced
or if the cable gland is not
correctly fitted. Exd motors must
be connected with approved fitting
and practice.

All pumps, excluding those
intended for use in hazardous
atmospheres, may be fitted with a
door indicator switch. This switch
is rated 240V 0.5A AC Max. Power
load 50W Max. This switch is NOT
intended as a primary safety
device. Under normal operation the
pump door is kept closed and this
meets all statutory requirements
as a tool lockable fixed guard.

The switch may be used directly to
indicate that the door is open
during maintenance, or it may be
wired, following accepted fail safe
practices, into a customers start

up/shut down control system to
provide a back up to the Fixed Guard, whilst maintenance is being
carried out. However, all normal maintenance safety practices should
also be observed.

There are dangerous voltages (at mains potential) inside the motor. If
access is required, isolate the pump from the mains before removing the
cover.

Page 6