Alfalaval MOPX 310TGT-24 User manual

ALFA LAVAL SEPARATION
MOPX 310TGT-24
Separator Manual
Product No. 881077-01-07
Book No. 1270376-02 V1

2

Alfa Laval Separation AB
Separator Manuals, dept. SKL
S-147 80 Tumba, Sweden
Telephone: [phone]
Telefax: [phone]
Printed in Sweden, 96-10
© Alfa Laval Separation AB 1996
This publication or any part thereof may not be
reproduced or transmitted by any process or
means without prior written permission of
Alfa Laval Separation AB.

4

Contents
5
1 Read this first 7
2 Safety Instructions 9
3 Separator Basics 15
3.1 Basic principles of separation 16
3.2 Design and function 18
3.3 Separating function 25
3.4 Definitions 31
4 Operating Instructions 33
4.1 Operating routine 34
5 Service Instructions 43
5.1 Periodic maintenance 45
5.2 Maintenance Logs 49
5.3 Check points at Intermediate Service (IS) 56
5.4 Check points at Major Service (MS) 74
5.5 Lifting instructions 88
5.6 Cleaning 89
5.7 When changing oil 93
5.8 Vibration 97
5.9 Common maintenance directions 99
6 Dismantling/Assembly 103
6.1 Introduction 104
6.2 Inlet/outlet, frame hood (IS) 106
6.3 Bowl hood and disc stack (IS) 110
6.4 Bowl body and
operating mechanism (IS) 123
6.5 Operating water device (IS) 132

6
6.6 Vertical driving device (MS) 136
6.7 Horizontal driving device (MS) 148
6.8 Feed pump (MS) (option) 162
7 Trouble-tracing 171
7.1 Mechanical functions 172
7.2 Separating functions, purification and
clarification 176
7.3 Separating functions, purification only 179
7.4 Separating functions, clarification only 181
7.5 Vibration switch (option) 182
8 Technical Reference 183
8.1 Technical data 184
8.2 Basic size drawing, without pump 187
8.3 Connection list, without pump 189
8.4 Basic size drawing, with pump 191
8.5 Connection list, with pump 193
8.6 Interface description 195
8.7 Water quality 199
8.8 Lubricants 200
8.9 Other drawings 208
8.10 Storage and installation 216
Index 227

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Study instruction manuals and observe the
warnings before installation, operation,
service and maintenance.
Not following the instructions can result in
serious accidents.
In order to make the information clear only foreseeable conditions
have been considered. No warnings are given, therefore, for
situations arising from the unintended usage of the machine and its
tools.

8

9
1 Read this first
This manual is designed for operators and service
engineers working with the Alfa Laval separator
MOPX 310TGT-24.
For information concerning the function of the
separator, see chapter ‘‘3 Separator Basics” on
page 17 and chapter ‘‘8 Technical Reference” on
page 185.
If the separator has been delivered and installed
by Alfa Laval as part of a processing system, this
manual is a part of the System Manual. In this
case, study carefully all the instructions in the
System Manual.
In addition to this Separator Manual a
Spare
Parts Catalogue , SPC is supplied.
This Separator Manual consists of:
Safety Instructions
Pay special attention to the safety instructions for
the separator. Not following the safety
instructions can cause accidents resulting in
damage to equipment and serious injury to
personnel.
Separator Basics
Read this chapter if you are not familiar with this
type of separator.
Operating Instructions
This chapter contains operating instructions for
the separator only.
S0068011
Separator Manual and Spare Parts Catalogue

1 Read this first
10
Service Instructions
This chapter gives instructions for daily checks,
cleaning, oil changes, servicing and check points.
Dismantling / Assembly
This chapter contains step-by-step instructions for
dismantling and assembly of the separator for
service and repair.
Trouble-tracing
Refer to this chapter if the separator functions
abnormally.
If the separator has been installed as part of a
processing system always refer to the Trouble-
tracing part of the System Manual first.
Technical Reference
This chapter contains technical data concerning
the separator and drawings.
Index
This chapter contains an alphabetical list of
subjects, with page references.

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2 Safety Instructions
The centrifugal separator includes parts that
rotate at high speed. This means that:
•Kinetic energy is high
•Great forces are generated
•Stopping time is long
Manufacturing tolerances are extremely fine.
Rotating parts are carefully balanced to reduce
undesired vibrations thatcan cause a breakdown.
Material properties have been considered
carefully during design to withstand stress and
fatigue.
The separator is designed and supplied for a
specific separation duty (type of liquid, rotational
speed, temperature, density etc.) and must not be
used for any other purpose.
Incorrect operation and maintenance can result in
unbalance due to build-up of sediment, reduction
of material strength, etc., that subsequently could
lead to serious damage and/or injury.
The following basic safety instructions therefore
apply:
•Use the separator only for the purpose
and parameter range specified by
Alfa Laval.
•Strictly follow the instructions for
installation, operation and maintenance.
•Ensure that personnel are competent and
have sufficient knowledge of maintenance
and operation, especially concerning
emergency stopping procedures.
•Use only Alfa Laval genuine spare parts
and the special tools supplied.
G0010411

2 Safety Instructions
12
DANGER
Disintegration hazards
•Use the separator only for the purpose
and parameter range specified by
Alfa Laval.
•If excessive vibration occurs, stop
separator and keep bowl filled with
liquid during rundown.
•When power cables are connected,
always check direction of motor rotation.
If incorrect, vital rotating parts could
unscrew.
•Check that the gear ratio is correct for
power frequency used. If incorrect,
subsequent overspeed may result in a
serious break down.
•Welding or heating of parts that rotate
can seriously affect material strength.
•Wear on the large lock ring thread must
not exceed safety limit. φ-mark on lock
ring must not pass opposite φ-mark by
more than specified distance.
•Inspect regularly for corrosion and
erosion damage. Inspect frequently if
process liquid is corrosive or erosive.
kPa m /h
3
3
o
C
rpm
Hz
kg/m
S0051311S0055611

13
2 Safety Instructions
DANGER
Entrapment hazards
•Make sure that rotating parts have come
to a complete standstill before starting
any dismantling work.
•To avoid accidental start, switch off and
lock power supply before starting any
dismantling work.
•Assemble the machine completely
before start. All covers and guards must
be in place.
Electrical hazards
•Follow local regulations for electrical
installation and earthing (grounding).
WARNING
Crush hazards
•Use correct lifting tools and follow lifting
instructions.
•Do not work under a hanging load.
Noise hazards
•Use ear protection in noisy
environments.
S0051111
S0051011
S0051711S0051611

2 Safety Instructions
14
CAUTION
Burn hazards
•Lubrication oil and various machine
surfaces can be hot and cause burns.
Cut hazards
•Sharp edges on separator discs and lock
ring threads can cause cuts.
S0055411S0054311

15
2 Safety Instructions
Warning signs in the text
Pay attention to the safety instructions in this
manual. Below are definitions of the three grades
of warning signs used in the text where there is a
risk for injury to personnel.
DANGER
Type of hazard
This type of safety instruction indicates a
situation which, if not avoided, could result in
fatal injury or fatal damage to health.
WARNING
Type of hazard
This type of safety instruction indicates a
situation which, if not avoided, could result in
disabling injury or disabling damage to
health.
CAUTION
Type of hazard
This type of safety instruction indicates a
situation which, if not avoided, could result in
light injury or light damage to health.
NOTE
This type of instruction indicates a situation
which, if not avoided, could result in damage
to the equipment.

2 Safety Instructions
16

17
3 Separator Basics
Contents
3.1 Basic principles of separation 16
3.2 Design and function 18
3.2.1 Overview 18
3.2.2 Mechanical power transmission 19
3.2.3 Brake 19
3.2.4 Feed inlet pump (option) 20
3.2.5 Paring disc pump 20
3.2.6 Sensors and indicators 20
3.2.7 Process main parts 22
3.3 Separating function 25
3.3.1 Purifier bowl 25
3.3.2 Clarifier bowl 27
3.3.3 Normal separation 28
3.3.4 Sludge discharge cycle 29
3.4 Definitions 31

3.1 Basic principles of separation 3 Separator Basics
18
3.1 Basic principles of
separation
The purpose of separation can be:
•to free a liquid of solid particles,
•to separate two mutually insoluble liquids with
different densities while removing any solids
presents at the same time,
•to separate and concentrate solid particles
from a liquid.
Separation by gravity
A liquid mixture in a stationary bowl will clear
slowly as the heavy particles in the liquid mixture
sink to the bottom under the influence of gravity.
A lighter liquid rises while a heavier liquid and
solids sink.
Continuous separation and sedimentation can be
achieved in a settling tank having outlets
arranged according to the difference in density of
the liquids.
Heavier particles in the liquid mixture will settle
and form a sediment layer on the tank bottom.
Centrifugal separation
In a rapidly rotating bowl, the force of gravity is
replaced by centrifugal force, which can be
thousands of times greater.
Separation and sedimentation is continuous and
happens very quickly.
The centrifugal force in the separator bowl can
achieve in a few seconds what takes many hours
in a tank under influence of gravity.
G0010711
Sedimentation by gravity
G0010811
Sedimentation in a settling tank, with outlets making it
possible to separate the lighter liquid parts from the
heavier
G0010911
The centrifugal solution

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3 Separator Basics 3.1 Basic principles of separation
Separating temperatures
For some types of process liquids (e.g. mineral
oils) a high separating temperature will normally
increase the separation capacity. The
temperature influences oil viscosity and density
and should be kept constant throughout the
separation.
Viscosity
Low viscosity facilitates separation. Viscosity can
be reduced by heating.
Density difference
The greater the density difference between the
two liquids, the easier the separation. The density
difference can be increased by heating.
G0011021
High viscosity (with low temperature)
G0011121
Low viscosity (with high temperature)
G0011221
High density (with low temperature)
G0011321
Low density (with high temperature)

3.2 Design and function 3 Separator Basics
20
3.2 Design and function
3.2.1 Overview
The separator comprises a processing part and a
driving part. It is driven by an electric motor (10).
Mechanically, the separator machine frame is
composed of a bottom part, a top part and a
frame hood. The motor is flanged to the frame as
shown in the illustration. The frame feet (5) are
vibration damping.
The bottom part of the separator contains the
horizontal driving device (6), driving shaft with
couplings (8, 9), a worm gear (7) and a vertical
spindle (3).
The bottom part also contains an oil bath for the
worm gear, a brake and a revolution counter.
The frame top part and the frame hood contain
the processing parts of the separator, the inlet,
outlets and piping (1).
The liquid is cleaned in the separator bowl (2).
This is fitted on the upper part of the vertical
spindle and rotates at high speed in the space
formed by the frame top part and frame hood. The
bowl also contains the discharge mechanism
which empties the sludge from the bowl.
The main inlets and outlets are shown with
connection numbers in the illustration. These
numbers correspond with the numbers used in
the connection list and the basic size drawing
which can be found in chapter ‘‘8 Technical
Reference” on page 185.
As option the separator can be equipped with a
feed inlet pump (4).
G0580361
1. Inlet and outlet device
2. Bowl
3. Vertical driving device with bowl spindle
4. Feed inlet pump (option)
5. Frame feet
6. Horizontal driving device
7. Worm gear
8. Friction coupling
9. Elastic coupling
10. Electric motor
201. Unseparated oil inlet
206. Sealing/displacement water inlet
220. Clean oil outlet
221. Water outlet
222. Sludge discharge outlet
372. Bowl opening water inlet
376. Bowl closing and make-up water inlet