Alfa Laval C MRPX 614HGV-74C, H MRPX 614HGV-74C, A MRPX 614HGV-14C, B MRPX 714HGV-14C, C MRPX 714HGV-74C Operator's Manual
...
Operator’s Manual
Self-cleaning Hermetic Separators
Product N o. :
A MRPX 614HGV-14C
C MRPX 614HGV-74C
H MRPX 614HGV-74C
W MRPX 614HGV-74C
A MRPX 714HGV-14C
B MRPX 714HGV-14C
C MRPX 714HGV-74C
H MRPX 714 HGV-74C
W MRPX 714HGV-74C
B BRPX 714HGV-34C
D MRPX 714HGV-34C
C MRPX 518HGV-74C
H MRPX 518HGV-74C
W MRPX 518HGV-74C
B MRPX 618HGV-14C
C MRPX 618HGV-74C
F MRPX 618HGV-74C
H MRPX 618HGV-74C
W MRPX 618HGV-74C
B BRPX 618HGV-34C
D MRPX 618HGV-34C
881208-01-01
881208-01-01
881208-01-01
881208-01-01
881208-02-01
881208-02-01
881208-02-01
881208-02-01
881208-02-01
881208-02-01
881208-02-01
881209-01-01
881209-01-01
881209-01-01
881209-02-01
881209-02-01
881209-02-01
881209-02-01
881209-02-01
881209-02-01
881209-02-01
H MRPX 718HGV-74C
W MRPX 718HGV-74C
H MRPX 818HGV-74C
B MRPX 818HGV-14C
B BRPX 818HGV-34C
H MRPX 818HGV-74C
W MRPX 818HGV-74C
Product No.: Multiple
Book No.: 1271058-02 V3
881209-03-01
881209-03-01
881210-01-01
881210-01-02
881210-01-02
881210-01-02
881210-01-02
Alfa Lav al Separati on AB
Separator Manuals, dept. SKEL
S-147 80 Tumba, Sweden
Telephone: +46 8 53 06 50 00
Telefax: +46 8 53 03 10 40
Printed in Sweden, 99-12
© Alfa Laval Separation AB 1999
This pub lic ation or any part thereof m ay not be
reprod uc ed or transm it t ed by any proc es s or
means wi th out prior writ te n permissio n of
Alfa Laval Separation AB.
Study instruction manuals and observe the
warnings before installation, operation,
service and maintenance.
Not following the instructions can result in
seriou s accident s.
In order to m ak e t he informat ion clear only foreseeable c onditions
have been considered. No warnings are gi v en, t herefore, fo r
situations arising from the unintended usage of the machine and its
tools.
3
4
Contents
1 Safety Instructions 7
2 Separation process 13
2.1 Basic principles 15
2.2 General 16
3 Mechanical function 19
3.1 Identification and safety signs
on the machine 20
3.2 Power transmission 23
3.3 Brake 26
3.4 Speed indication 26
3.5 Outlet / inlet (twin phase separators) 28
3.6 Outlet / inlet (single phase separators) 30
3.7 Axial seals –
cooling system 31
3.8 Bowl 33
4 Sediment discharge function 35
4.1 Function description 36
4.2 Operating water module compact (OWMC) 38
5 Installation and first start 41
5.1 Preparations 42
5.2 Before first start 43
5.3 First start 44
5.4 Operation 44
5.5 Stopping 46
6 Cleaning 47
6.1 Check of cleaning 48
5
7 Operating routine 51
7.1 Check points 52
8 Trouble tracing 55
8.1 Mechanical function 56
8.2 Sediment discharge function 59
8.3 Axial seals 61
6
1 Safety Instructions
The centrif ugal separ at or includes pa rt s th at
rotate at high speed. T his m eans that:
• Kinetic energy is high
• Great fo rc es are generat ed
• Stopping time is lon g
Manufacturing tolerances are extremely fine.
Rotating parts are ca ref ully balance d t o reduce
undesired vibrations that can cause a breakdown.
Material properties have been considered
carefully during des ign to withstand stress and
fatigue.
G0010411
The separ at or is designed and supp lied for a
specific separation dut y (t y pe of liquid, rotat ional
speed, temperature, density etc.) and must not be
used for an y oth er purpose .
Incorrect operation and maintenance can result in
unbalance due to bui ld-up of sediment, reduc ti on
of material strength, etc., that subsequent ly coul d
lead to seri ous damage a nd/or injury.
The following basic sa f et y ins t ruc t ions 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.
7
DANGER
Disintegration hazards
• Use the separator only for the purpose
and para m et er range spe c if ied by
Alfa Laval.
• If excessive vibration occurs, stop
separat or and keep bowl filled with
liquid during rundown.
• When power cables are conn ec t ed,
always check direction of motor rotati on.
If incorrec t , vit al rotating parts could
unscrew.
1 Safety Instructions
S0051311
• Chec k th at th e gear ratio is c orrect for
power frequency used. If incorrect,
subsequ ent oversp eed may result in a
serious b reak down.
• Welding or heating of parts that rotat e
can serio us ly affec t m at erial strengt h.
• Wear on t he large lock ring thread mu s t
not exceed safety limit. φ-mark on lock
ring must not pass op pos it e φ-mark by
more than specified distance.
• Inspe c t re gularly for corrosion and
erosion damage. Inspect frequently if
process liquid is corrosive or erosiv e.
S005 5611
8
1 Safety Instructions
DANGER
Entrapment hazards
• Make sure that rotating part s have come
to a complete standsti ll be fo re s t arting
any dismantling work.
• To avoid accidental start, switch off and
lock power supply before startin g any
dismantling work.
• Assemble the machine completely
before start. All covers and guards must
be in place.
S0051111S0051011
Electrical hazards
• Follow lo c al regulatio ns fo r electrical
installation and earthing (grounding).
W ARNING
Crush hazards
• Use correct lifting to ols and follow lift ing
instructions.
• Do not work un der a hanging load.
Noise hazards
• Use ear p rot ection in nois y
environm ents.
S0051711
S0051611
9
CAUTION
Burn hazards
• Lubr ic at ion oil and var ious machin e
surfaces c an be hot and cause burns .
Cut hazards
• Sharp edges on separator discs and lock
ring threads can cau s e c ut s .
1 Safety Instructions
S0055411S0054311
10
1 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 sig ns us ed in the text w here there is a
risk for injury t o personne l.
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 dam age to
health.
CAUTION
Type of hazard
This type of safety instruction indicates a
situation which, if not avoided, could result in
light injury or ligh t dam age to hea lt h.
NOTE
This type of instruction indicates a s it uat ion
which, if not avoided, could result in damage
to the equip m ent.
11
1 Safety Instructions
12
2 Separation process
Contents
2.1 Basic principles 15
2.1.1 Separation by gravity 15
2.1.2 Centrifugal separation 15
2.2 General 16
2.2.1 Throughput 17
2.2.2 Light phase 18
2.2.3 Air penetration / inlet pressure 18
13
2 Separation process
14
2 Separation process 2.1 Basic principles
2.1 Basic principles
The purpos e of separat ion can be:
• to free a liq uid of solid part ic les.
• to separate two mutually insoluble liquids with
different densities, removing any solids at the
same time.
• to separ at e and concentrate sol id particles
from a liq uid.
Sedimentation by gravity
2.1.1 Separ ation by gravity
A turbid liquid in a statio nary vessel will c lear
slowly as the heavy part ic les in the liqui d m ix t ure
are sinkin g to th e bottom un der the influen c e of
gravity. The lighter liqu id phase will ris e while the
heavier sinks.
G0010711
Continuo us se paration and sedimentation can be
achieved in a s et t ling tank hav ing the outlets
arranged at levels suited to the density ratio of the
two liquid p hases. Any s olids and heav ier
particles in the liquid mixture will settle and form a
sediment layer on the tank bottom.
2.1.2 Centrifugal se paration
In a rapidly rot at ing vessel the gravity is rep laced
by the cent rif ugal force, which can be thousands
of times gre at er. Separ at ion and sed im entation
are contin uous and very f as t . When liquid an d
solid parti cl es in a liquid mixt ure are subjec te d t o
the centrif ugal force in a s eparator bow l, it tak es
only a few seconds to achieve what takes many
hours in a ta nk under influe nc e of gravity.
G0010821
Sedimentation in a settling tank, with outlets making it
possible to separate the lighter liquid parts from the
heavier
The centrifugal solution
G0010921
15
2.2 General 2 Separation process
2.2 General
Twin phase separators
The flow of t he product th rough the ma ch ine is
shown in th e adjoining f igure.
Product is fe d t o t he inlet bend (1) f or f urther
conveyance through the hollow bowl spindle (2)
to the dist ributor (3) an d onwards th rough the
distribu t ion holes in the discs (4). The s eparation
takes place in the spaces between t he discs. The
light phas e is forced a long the upper s ides of the
discs towards the bowl centre, leaves the bowl
and is ref orw arded by the impeller (5). T he rest –
heavy phase and sediment – moves along the
undersides of the d is c s tow ards the bowl
periph ery w here the sediment settles in the
sediment space (6). The heavy phase continues
along the upper side of the top disc (7) to the
impeller (8), which effec t s the further routing.
Legend
1. Inlet bend
2. Bowl spindle (hollow)
3. Distributor
4. Bowl discs
5. Impeller – light phase
6. Sediment space
7. Top disc
8. Impeller – heavy phase
G0695721
16
2 Separation process 2.2 General
Single phase separators
The flow of the product thro ugh the machine is
shown in the adjoining figure.
Product is f ed to the inlet b end (1) for further
conveyance through the hollow bow l spindle (2 )
to the distri but or (3) and onw ards throug h t he
distribution holes in the discs (4). The separation
takes place in the spaces b etwee n the di scs. Th e
liquid is forced along th e upper sides of the discs
towards th e bowl centr e, leaves the bo w l and is
reforward ed by the imp eller (5). The re s t –
sedimen t – mo v es along the un dersides of th e
discs towards the bowl periphery where the
sedimen t set t les in the sedim ent space (6).
Legend
1. Inlet bend
2. Bowl spindle (hollow)
3. Distributor
4. Bowl discs
5. Impeller – separated liquid
6. Sediment space
2.2.1 Throughput
The throughput is directly dependent on the flow
resistanc e in the separator and sub s equent
devices and piping as well as on the height of the
collecting t anks abov e th e outlet.
The throu ghput is regulated by adju s ti ng t he inlet
pressure .
G0695711
17
2.2 General 2 Separation process
2.2.2 Light phase
Twin phase separators only
Decrea s ed light phase
counte rpressure
Increa se d light phase
counte rpressure
The light phase flow and thus the concentration of
the light phase are de te rm ined by the pre s s ure
difference between the two outlets. With one and
the same throughput a certain pressure
difference w ill always g iv e t he s ame light pha s e
flow. With higher c ounterpre s su re in the light
phase outlet pipe th e light phase concentrat ion
will be higher.
lower concentration
➞
higher conc entration
➞
A. Light phase
B. Heavy phase
G0699721
2.2.3 Air penetration / inlet pressure
A prereq uis ite for satis fa c to ry s eparation is that
air is prev ented from mi xi ng with the proc es s
liquid.
Air pene t rat ion can occu r f or instance if the
pressu re in front of the inlet device is too low or if
the balance vessel suddenly becomes empty.
This can be caused by a careless change-over of
tanks, incorrect dime ns ions or by changing at the
incorrec t time. Even si m ult aneous filling and
emptying of a tank can result in admixture of air.
Make sure, therefo re, that the inle t pres s ure is
kept at th e recomme nded value and that the
balance vessel is always full. In the vessel, the
liquid should flow gently withou t b ubbling.
G0699811
18
3 Mechanical function
Contents
3.1 Identification and safety signs
on the machine 20
3.2 Power transmission 23
3.2.1 Motor and starter 25
3.3 Brake 26
3.4 Speed ind ication 26
3.5 Outlet / inlet
(twin phase separators) 28
3.5.1 Outlet pumps 28
3.5.2 Inlet device 28
3.5.3 Axial seals 28
3.6 Outlet / inlet
(single phase separators) 30
3.6.1 Outlet pump 30
3.6.2 Inlet device 30
3.6.3 Axial seals 30
3.7 Axial seals –
cooling system 31
3.8 Bowl 33
19
Identification and safety signs on the machine 3 Mechanical function
3.1 Identification and safety signs on the machine
1. Machine plate Text on plate (example):
Separ at or A MRPX 614HGV-14C
Manuf ac t uring serial No / Year XXXX
Product N o 8 81208-01-0 1
Machin e t op part 552032 -02
Outlet 562013 -02
Bowl 546860 -12
Machin e bottom pa rt 553136 -41
Max. sp eed (bowl) 4265 r/m in (50 Hz)
Direction of rotatio n (bowl) ←
Speed m ot or s haft 1500 r/min (50 H z )
El. current frequency 50 Hz / 60 Hz
Recommended motor power 18,5 kW
Max. density of feed 1100 kg/m
Max. density of sediment 1380 kg/m
Max. density of operating liquid 1000 kg/ m
3
3
3
G0663751
S0061411
Process temperature min./max. 0 - 100 °C
20
3 Mechanical function Identification and safety signs on the machine
3. Safety la b el
Text on label:
DANGER
Read the in s tr uc t ion manual s before instal lat ion,
operation and maintenance. Consider inspection
intervals.
Failure to st ric t ly fo llow instruct ions can lead to
fatal injury.
If excessive vibration occurs, stop separat or and
keep bowl fi lled with liquid during rundown.
Out of balance vibration will become worse if bowl
is not full.
Separator must stop rotating before any
dismantling work is st art ed.
S0061521S006 3211
4. Name plate
5. Arrow
Indicating direction of rotation.
7. Power supply frequency, all separators
except HM/BM/BB/WM/ RPX 818
Power supply frequency, HMRPX 818 (spec.
881210-01-01)
50Hz
60Hz
S0063111
S014 3221
Power supply frequency H MRPX 818
Power supply frequency, HM/BM/BB/WM/ RPX
818 (spec. 881210-01-02)
S0145721
Power supply frequency HM/BM/BB/WM /RPX 818
21
Identification and safety signs on the machine 3 Mechanical function
DANGER
Disintegration hazard
This mac hine must no t be operated wi th
higher b ow l s peed than 4 607 r/min.
* Space reserved for plate indicating
representative
22
3 Mechanical function 3.2 Power transmission
3.2 Power transmission
1. Electromotor
(Note! Special motor with
built-in thermistors)
2. Coupling
3. Worm wheel shaft
4. Top bearing
5. Bowl spindle
6. Worm
7. Worm wheel
8. Cooling coil for oil bath
9. Cooling water inlet/outlet
for co il
The motor (1) rotates the bowl through th e
coupling (2) and the worm gear (6, 7). The worm
gear serve s to adapt the bowl speed to the motor
speed. The number of revolutions of the bowl is a
few times higher than th at of th e m ot or.
The bearings on the bow l spindle (5) and the
worm wheel shaft (3) are lubricated by the oil mist
produced by the worm wheel (7), which dips int o
the oil bath in th e w orm gear ho us ing.
G05676E1
10. Box for electric and thermistor
connections.
To be remedied only by authorized
personnel. It is important for the sake of
security during maintenance to have a
disconnection switch installed visible
from the separator.
23
3.2 Power transmission 3 Mechanical function
The wor m gear has bee n s pecially designed to
operate at a low sound level.
To keep the oil t emperature low, a cooling coil is
installe d in the worm gear housing.
The oil is cooled by the w at er f low ing through t he
coil (8).
The coo ling water fro m th e c oil then passes
through external pipes to the ax ial s eals.
Sealin g w at er – see “Connection list ” in
Installat ion Manua l
.
Oil – see “Lubricants ” in
Manual
.
Servic e & M aintenan c e
24
3 Mechanical function 3.2 Power transmission
3.2.1 Motor and starter
G0665121
View of a CT motor
1. Thermistors Run-up period: Y-connected
Operation: D-connected
The separ at or has a flexib le c oupling and for this
reason the m ot or must be ab le t o endure long
run-up tim es . Fo r t his purpose the separator is
equippe d w it h one of follow ing two motor types:
CT motor
This moto r has been desi gned by Alfa La v al as
“Control- to rque motor” - abbrevia te d t o C T motor.
The motor has some extra features compared
with a standard three phase motor with the same
kW rating. It has a higher cla s s of in s ulation, a
higher rotor resistan c e and larger iron masses.
These features counteract the temperature rise in
the motor w hen startin g. Fu rt hermore, the m otor
is provide d w it h t hermal sens ors in the form of
thermistors in the stator windings. The
thermistors must be connected to a special
tripping dev ic e in the star te r.
The overlo ad protecti on (e.g. in the form of
bimetal re lay s ) in the starter m ust be connec t ed
into the D circuit. The protection must be
inoperativ e during the run-up period .
Frequency drive motor
This moto r is similar to a stan dard three phase
motor. The long run ning up time is , h ow ever,
controlle d by a f requency c onverter.
25
3.2 Brake 3 Mechanical function
3.3 Brake
To shorten th e bowl retardation time and thus
quickly pass the critical speed, the brake must
always be used when the machine is to be
stopped.
The machine is provided with a pneumati c bra k e,
which is ac t uated when compress ed
(max. 400 kPa) air is s upplied.
3.4 Speed indication
S0118411
1. Revolution counter
2. Speed sensor for remote indication
Revolution counter
For man ual speed checks, the ma c hine is
provided with a revolution counter. The correct
number of revolutions per minute for the machine
is given on the type plate and / or on the data
sheet for t he type of mac hine in quest ion, see
“Technical data” in
Installation Manual
.
26
G0695611
3 Mechanical function 3.2 Speed indication
Remote indication of speed (option)
In addition to the revolution counter, the separator
can be prov ided with a dev ic e for remote
indicatio n of s peed, show ing the numbe r of
revolutio ns m ade by the wo rm w heel shaft.
Remote indication is obt ained by an electronic
speed ins tr um ent.
It is essential that the machine should run at
the correct speed, for safety reasons as well
as separation-technical.
Speed – see “Technical d at a” in
Manual
.
Installation
27
3.5 Outlet / inlet (twin phase separators) 3 Mechanical function
3.5 Outlet / inlet (twin
phase separators)
3.5.1 Outlet pumps
The pumps are fixed on to the top of the bowl and
thus follow its rotation. They provide the
necessary pressures for the heavy phase and the
light phas e. It is assum ed that the sep arator is
supplied with adequate inlet pr es s ure.
3.5.2 Inlet device
The required inlet p res s ure is obtain ed directly
from the s upply pipe o f the separato r. If
necessary, an external pump ca n be located
before t he s eparator.
G0695021
3.5.3 Axial seals
The connection of the inlet and outlets to the bowl
is made airt ight (hermet ic ) by means of a x ial
seals. T here are thre e s eals for the ou t let s and
one for th e inlet.
1. Coil spring
2. O-ring
3. Support for wear ring
4. L-shaped rubber
5. Wear ring
6. Sealing element
7. L-shaped rubber
An axial seal consists of a rotary wear ring and a
non-rotary sealing element.
28
G0695121
3 Mechanical function 3.5 Outlet / inlet (twin phase separators)
The sealin g element and wear ring m us t alw ays
be flushed w it h liquid when th e bowl rotates . The
seals are therefore supplied, thro ugh special
channels , wi th flu s hing water, and durin g t he
CIP-perio d w it h CIP-liquid.
29
3.6 Outlet / inlet (single phase separators) 3 Mechanical function
3.6 Outlet / inlet (single
phase separators)
3.6.1 Outlet pump
The pump is fixed on to the top of the bowl and
thus follows its rotation. It provides the necessary
pressure for the clarified phase. It is assumed that
the sepa rator is supp lied with adeq uate inlet
pressu re.
3.6.2 Inlet device
The required inlet p res s ure is obtain ed directly
from the s upply pipe o f the separato r. If
necessary, an external pump ca n be located
before t he s eparator.
3.6.3 Axial seals
The con nection of the inlet and out let to th e bowl
is made airt ight (hermet ic ) by means of a x ial
seals. Th ere is one seal for the outlet and one for
the inlet .
1. Coil spring
2. Support for wear ring
3. L-shaped rubber
4. Wear ring
5. Sealing element
6. L-shaped rubber
G0695011
An axial seal consists of a rotary wear ring and a
non-rotary sealing element.
30
G0695111
3 Mechanical function 3.6 Axial seals – cooling system
The sealin g element and wear ring m us t alw ays
be flushed w it h liquid when th e bowl rotates . The
seals are therefore supplied, thro ugh special
channels , wi th flu s hing water, and durin g t he
CIP-perio d w it h CIP-liquid.
3.7 Axial seals – cooling system
(The illustrations in th is ch apter show twin phase
separato rs )
During starting / separation / s to pping per iods
During the starting / separation / stopping periods,
cooling wa t er is f ed t o t he seals thro ugh
connections (2 and 3 ).
The coolin g w at er from the out let seals
discharg es th rough the sediment outlet (4) and
pipe (7). From the inlet seals the water flows out
through out let (5).
Water pressure and flow – see “Connection list” in
Installati on M anual
1, 6 Cooling coil for oil bath.
2, 3 Cooling water inlet
4 Sediment outlet / cooling water outlet
5, 7 Indication tube for cooling water
9Valve *)
10 Valve
*) Normally included in the control unit cabinet.
Note: The indicat ion tubes (5 and 7 in the figur e)
provides an easy mean s of visual indicati on that
water is being su pplie d to the se als. Note that the
pipes (5 and 7) will also s erv e as an indica tio n
pipe for sea l leakage, if a ny.
.
31
G0695231
3.6 Axial seals – cooling system 3 Mechanical function
During separation
The coo ling water flo w s in th roughout the
separating period. The flushing water should flow
through the indication tube (7). The flushing water
should be clear and not discoloure d.
NOTE
If the flushing water is dis c oloured, thi s may
be due to leaking axial seals.
In cases of major leakage, the seals must, of
course, be inspected and possibly replaced. (See
Service & Maintenance Manual
Minor discoloration from possible seal leaks may
occur for a short time, especially when new seals
have been installed. This does not affect the
runnin g of th e m achine.
.)
G0695331G0695431
During cleaning (CIP)
To clean the s pace aroun d t he seals it is best to
draw off wa sh ing liquid fro m th e heavy phase
outlet, by a v alv e (10). The s olenoid valv e (9) is
then closed.
32
3 Mechanical function 3.8 Bowl
3.8 Bowl
Twin phase separators
The bowl b ody (1) and the b ow l hood (2) whic h
make up the casing of the bowl are held together
by the large loc k ring (3).
Housed in th e bowl are the distributor (4),
distributing cone (7) and the disc stack (5), where
the separation takes place. Uppermost in the disc
stack is the to p dis c (6), on the pipe of which the
discharge pumps are mounted.
The parts by which the sediment discharges are
effected are ma rk ed with an as te ris k (* ) in t he list
below. The ejection process is described in
section ‘‘4.1 Function description” on page 36.
NOTE
The bowl must only be disassembled /
assembled by personnel with the proper
training.
1. Bowl body
2. Bowl hood
3. Lock ring (large)
4. Distributor
5. Bowl discs
6. Top disc
7. Distributing cone
8. Sediment port
9. Sliding bowl bottom*)
10. Operating slide*)
11. Spring* )
12. Spring support*)
G0699111G0694921
33
3.8 Bowl 3 Mechanical function
Single phase separators
The bow l body (1) and th e bowl hood (2) w hich
make up the casing of the bowl are held together
by the lar ge lock ring (3).
House d in t he bowl are the distributor (4),
distributing cone (7) and the disc stack (5), where
the separation takes place.
The part s by w hic h t he sediment dischar ges are
effected a re m arked with an asterisk (*) in t he list
below. The sediment disch arge function is
describ ed in anothe r s ec t ion of this book , see
‘‘4.1 Funct ion descript ion” on page 36 .
Replac em ent of certain parts neces s it ates
rebala nc ing if the bow l. S uc h parts are spec ially
indicated in the
Spare Pa rt s Ca t alogue
.
NOTE
The bowl must only be disassembled /
assembled by personnel with the proper
training.
1. Bowl body
2. Bowl hood
3. Lock ri ng (large)
4. Distributor
5. Bowl discs
6. -
7. Distributing cone
8. Sediment port
9. Sliding bowl bottom*)
10. Operating slide*)
1 1. Spring*)
12. Spring support *)
G0699121
34
G0694911
4 Sediment dis charge function
Contents
4.1 Function description 36
4.2 Operating water module compact
(OWMC) 38
35
4.1 Function description 4 Sediment discharge function
4.1 Function description
Bowl
1. Sliding bowl bottom
2. Operat ing sl i de
3. Sediment ports
4. Seal ring
5. Sediment space
6. Valve plugs
7. Coil springs
8. Closing water chamber
9. Opening water channel
(discharge)
10. Draini ng nozz le
11. Closing water channel
12. Cont rol paring disc
13. Operating water suppl y from
the OWMC, see
‘‘4.2
Operating water m odule
compact (OWMC)” on page
38
G0569041
36
4 Sediment discharge function 4.1 Function description
The sediment disch arge takes plac e t hrough a num ber of
ports (3) in the bowl wall. Between disc harges thes e ports
are closed by th e s liding bowl bot t om (1), which con s ti tu t es
an internal bottom in the separating space. The sliding bowl
bottom is he ld against a seal ring (4) by the water act ing on
its underside. The pres s ure is produc ed during the rot ation
because of the c ent rifugal forc e and increas es w it h t he
distance from the axis of rotation of the bowl. The operating
water exert s an upward p res s ure exceed ing the count eracting downward pr es s ure from the proc ess liquid be c ause
the unders ide of the slid ing bowl bottom has a larger
pressure su rf ac e than its upp er side.
The space below the s liding bowl bot to m is ke pt c los ed by
valve plugs (6) seated in an operating slide (2). This slide is
forced upwards by coil springs (7). A constant water level is
held in the operating water chamber (8) by means of a
paring disc (12).
When a dis c harge shall b e effec t ed, compre s s ed air forces
the piston in t he OWMC for w ards. Water is now s upplied in
such quan t ity t hat water flow s ov er the edge of operating
water cham ber and onw ards throug h t he c hannel (9) t o t he
upper side of the operat ing slide.
• The slid e is fo rc ed downwards by the liquid pressure
create d between th e operating sli de and the bo w l body
thereby opening the v alv e plugs enabling the clos ing
water un der the sliding bowl bottom t o es c ape.
• The sliding bowl bottom is pressed downwards,
uncovering the ports in the bowl wall so that the
sedime nt is dis c harged.
• The water on the upp er side of the operating slide is
draine d off th rough a nozzle (10).
• When w at er has been su ffici ent ly drained thr ough the
nozzle , the coil springs again force the operating slide
upwards , c los ing the valv e plugs. The sli ding bowl
bottom is forced upwards by the operating water supply.
Thus the bowl is closed.
• The low pres s ure water is su pplied durin g th e w hole
cycle.
• The operating wat er now press es t he OWMC piston
back into its end pos it ion by means of th e operating
water pressure. The discharge is completed.
Solids and / or ex c essive mineral conten t in th e operating
water will dis t urb, and eventually block t he discharge
function.
37
4.2 Operating water module compact (OWMC) 4 Sediment discharge function
4.2 Operating water
module compact
(OWMC)
Purpose
The separator bowl can be emptied from solids by
two differe nt se diment dis ch arge volume s
determ ined by the duration of th e inc reased
operating liquid flo w fr om t he Operating Water
Module Compact (OWMC), i.e. the time the bowl
is being open. The two discharg e v olumes ma y
be rega rded as smal l and large respectively.
Design
1. Check valve
2. Two-step adapter
3. Water cylinder
4. Piston
5. Servo valve
6. Air reservoir
7. Silencer
8. Needle valve
375. Inlet of discharge and make-up liquid to OWMC
506a. Air supply into air reservoir
506b. Signal air, small discharge
506c. Signal air, large discharge
A. Outlet of discharge and make-up liquid from
OWMC to bowl
The OW M C is des igned as a st ainless steel
construc t ion consis tin g of an air reservoir (6), a
water cy linder (3) with piston (4) and a servo
valve (5 ). Th e m odule is equ ipped with
connec t ions for air sup ply (506a) and signal air
(506b a nd c ).
The OW M C is als o equipped w it h a needle valv e
(8) for regulating of air flow for the s m all
discha rge and a silen c er (7).
38
G0877921
4 Sediment discharge function 4.2 Operating water module compact (OWMC)
The OWMC gives a two-s t ep flow which implies
that the liquid flows into a one channel system in
two steps, see the illustration below. The first step
creates a high liquid flo w w hic h triggers a
sediment discharge, and the second step (with a
lower flow) w ill admit the bow l t o c lose while
closing (make-up) liquid is added to the bowl. The
flow betwe en the two ste ps is v ery low.
Flow
Discharge water
Closin g wate r
Time
39
4.2 Operating water module compact (OWMC) 4 Sediment discharge function
Settings
Start to s et th e large discharge volume.
Proceed in following way:
1. Set the air pressure regulator (11) to 400 kPa
(4 bar).
2. Initiate a discharge by opening solenoid valve
for air sup ply inlet (506c).
3. Measure the disc harged volu m e.
4. Adjust the discha rged volume by altering the
pressur e of th e c ompresse d air. A higher
pressure gives a larger volume. The air
pressur e c an be regulat ed between 400 and
600 kPa (4 - 6 bar).
Contin ue with the sm all discharge in fo llowing
way:
1. Open the needle valve (8) 3 turns .
G0878411
2. Initiate a discharg e by opening th e s olenoid
valve for air supply inlet (506b).
3. Measure the disc harged volu m e.
The recommended volume for a small
dischar ge is t he sediment s pace volume of
the bowl given in “Technical data” in the
Installat ion Manual
4. Adjust the discha rged volume by regulatin g
the needle valve. A more open valv e (anticlockwise) gives a larger volume.
.
NOTE
Do not ad jus t th e air pressure to change the
volume for the small discharge. If doing so,
the volu m es fo r both large a nd small
discha rges will be ch anged.
The needle valve only sets the ratio between
the large and small dis c harges.
NOTE
The sep arator bowl m us t not be discharged
with a too small volume as this leads to buildup of sediment in the sediment space as well
as in the di sc s t ac k res ulting in an im paired
separat ion efficiency.
40
5 Installation and first start
Contents
5.1 Preparations 42
5.2 Before first start 43
5.3 First start 44
5.4 Operation 44
5.4.1 Ejection process 45
5.4.2 Cleaning 45
5.4.3 Separation 46
5.4.4 Operation 46
5.5 Stopping 46
41
5.1 Preparations 5 Installation and first start
5.1 Preparations
1. Set up the machine (without the bowl)
accordi ng t o t he installat ion instructio ns .
2. Flush the piping thoroughly to remo ve any
residues such as chips, welding beads, etc.
NOTE
All piping m us t be disconnec t ed from the
separat or.
3. Check the op erating water f unctions an d
operating water flo w as below.
Checking the operating water flow.
When operating water is fed (375*) water shall
squirt ou t of the holes in weak jets.
During operation there will be no consumption of
water when the pressure is lower than 50 kPa
(0,5 bar).
At discharge water s hall squirt ou t of t he holes in
powerf ul jets.
4. Check that the water flow-rates correspond to
data in “Co nnection lis t ” in
Manual
− Water for lubric ation oil cooler 409*.
− Water for discharge 375* .
− Water for coo ling frame parts 405* and
:
406*.
Installat ion
NOTE
Pressu re in connect ion 405* and 406* must
not be higher than 50 kP a. R is k fo r
deformation of frame hood and contact with
rotating part.
G0665911
NOTE
Outlet 406* and 464* mu st be open. No
restrictions allowed.
*) Numbers refer to “Connection list” in
Installation Manual
42
.
5 Installation and first start 5.1 Before first start
5.2 Before first start
• Pour ab out 13 litres lu bric ating oil of correct
grade in to th e w orm gear ho us ing – see
“Lubricants” in
• Check th e oil (approx . half w ay up the sight
glass). Be aware of that a ve ry small quantity
of oil may remain at th e bottom edge of t he
sight gla s s ev en when the gear housing is
emptie d f or oil.
• Assemble the bowl and the inlet and outlet
parts as described in the
Mainte nance Manual
• Make sure that the frame hood bolts have
been tightened.
• Make sure that the b olt s fo r c entring ring and
outlets have been tightened to the correct
torque. See Service &
Installat ion Manua l
Service &
.
Mainte nance Manual
.
.
S01178 11S0117911S0118021S0118111G0699221
• Make sure that the b olt s fo r th e inlet device
have been tightened.
• Check th at w at er and air are being supplied
to the cont rol panel.
Make sure t hat cooling w at er is being sup plied to
the separa t or.
Check at
(1) – from inl et dev ic e seal
(2) – from ou tl et upper seals (t w in phase
separato rs only, see ill .)
(3) – from ou tl et bot t om s eal (at oper at ion).
43
5.3 First start 5 Installation and first start
5.3 First start
• Start the machine
• Check the direction of rotation (see revolution
counter).
NOTE
At the sw itch-over to D th e am perage w ill
increas e c onsiderab ly, but will quic kl y d rop
toward s the idling lev el provided tha t th e
motor is correctly connected. If the
amperage remain s at th e high level, the
motor has been wrongly connected. Stop the
motor imm ediately.
• When the bowl has reached running spee d,
check the rev olution counter reading. For
speed particulars , see “Technical dat a” in
Installat ion Manual
The bow l is n ow c los ed (provid ed that makeup water has been supplied during the run-up
period).
• Make s ure that the valv es in the outlet s are
open.
.
S01182 11
Revolution counter
5.4 Operation
• With the bowl closed, supply water to the
bowl (start the feed pump).
• Make s ure that the separation inlet pressur e
is suitable and the throughput co rrect. Then
check outlet pressures, see “Selection of
outlet impeller (twin phase sepa rat ors)” in
Installat ion Manual
• Shut off th e c ooling water to the axial se als.
NOTE
It is impor ta nt to have liquid flow through the
bowl.
.
44
5 Installation and first start 5.3 Operation
• Check th at t he bowl is tigh tl y closed – no
water in the cyclone outlet.
• Disconnect the pip es f or c ooling wate r to th e
outlet seals. Check for possible leakage from
these. Major leaks must not occur. Minor
leaks may t em porarily b e lef t uncorrected.
Some se als need as a rule certain wear-in
period .
• Connec t th e pipes for co oling water.
• Open the cooling water supply again.
5.4.1 Ejection process
WARNING
Liquid ejected at high
velocity
Ensure that no sediment discharge takes
place when opening cyclone cover. Wear
safety goggles.
• Disconnect the pip e f rom the cyclone as well
as the sediment cover flushing hose.
• Make the settings of th e Operating Water
Module t o achieve th e discharge volumes
desired, see “Interface description,
Compo nent descr ipt ion and signal
proces s ing” in
• Initiate a large discharge. If the bowl opens,
closes and then op ens again (so-c alled
double dis c harge), ad jus t th e air pressure
until you arrive at the volume desire d. F inally
adjust the needle v alv e to achieve a s uit able
small disc harge.
Installat ion Manual
.
S0118311
• Secure the cyclone outlet pipe and the
sedime nt c ov er flushing pipe.
5.4.2 Cleaning
• Carry ou t the c leaning programme. Ch ec k
that was hing solution is running out of the
axial sea ls .
45
5.3 Stopping 5 Installation and first start
5.4.3 Separation
• Supp ly process liqu id.
• Chec k th e inlet pressu re, see “Select ion of
outlet impeller (twin phase sepa rat ors)” in
Installat ion Manual
• Adju st t he outlet pres s ures, see “S election of
outlet impeller (twin phase sepa rat ors)” in
Installat ion Manual
.
.
5.4.4 Operation
• Check the throughput. Make a final
adjustment of inlet a nd outlet press ures.
• Make sure that no air is being sucked into the
feed pipe via e.g.a balance vessel, if fitted.
This should always be k ept filled. The
process liquid shou ld f low evenly in th e
vessel without bubbling.
After separation is c om pleted, carry out the
cleaning program m e. Dismantle t he bowl and
check th e c leaning 3 – 4 days after the f irs t
operation with product.
5.5 Stopping
The control system actuates the brake when
stoppin g t he separator.
Cooling w ater to the a xi al s eals and air to the
brake w ill be turned off au to m at ic ally after the
bowl has stopped.
DANGER
Entrapment hazard
Make sure that rota tin g parts have co m e t o
a complete standstill befo re s t arting any
dismantling work.
S01184 11
The revo lut ion counter indicates s eparator
rotation .
46
6 Cleaning
Contents
6.1 Check of cleaning 48
6.1.1 Disc pressure 49
47
6.1 Check of cleaning 6 Cleaning
6.1 Check of cleaning
The bow l s hould be dismantled and t he cleanin g
checked approx. 3 – 4 days after the first
operation with proc es s liquid. Repe at th e c heck
after a further 14 days. If the results are
favour able, the bowl can be lef t unt ouched until a
minor ov erhaul is due . Th is sh ould normally be
made af te r about 3 mont hs.
Inspect all discs. The upperside as well as the
underside of every disc must be bright. Fatty
discs and sediment residues on t he discs indica te
bad cleaning.
1. 1st run with process liquid
2. 1st inspection
3. 2nd inspection
4. Routine inspection
5. 3-4 days
6. 14 days
7. Approx. 3 months
G0695811
NOTE
A greyis h fi lm (but not containing proces s
liquid residues) may also occur on the discs
if the lye has been circulated after th e ac id.
To remove th e f ilm an extra run w it h ac id for
about 10 minutes is recommended.
If the bowl turns out to be badly cleaned, check
the temperature a nd concentrat ions of the acid
and lye. Correct any deviations from the
recommended values. Do not sample the
concentration once only, but preferably 5 or 6
times at regular intervals during the entire
cleaning cycle. In this way any fluctuations in the
concen t rat ion can be verified.
G0695921
G0696021
48
6 Cleaning 6.1 Check of cleaning
6.1.1 Disc pressu re
In a ti ghtened bo w l t he disc pres sure may i n t ime
decrease so that the individual discs are not
stable, although the guide mark on the lock ring is
directly aligned to the c orresponding mark on th e
bowl hood. Bad bowl run ning (vibratio n) may be
the result. If so, one or more extra discs must be
added to the disc stack. Extra discs must be
located under the thick-caulked discs. See
description in the
Service & Ma int enance Manual
.
NOTE
Insuffici ent compression of t he disc stack ca n
affect the bow l balance, ca us ing abnormal
vibration of the machine.
49
6.1 Check of cleaning 6 Cleaning
50
7 Operating routine
Contents
7.1 Check points 52
7.1.1 Before start 52
7.1.2 Start and run-up 52
7.1.3 Separation 53
7.1.4 Cleaning 53
7.1.5 Stop 54
51
7.1 Check points 7 Operating routine
7.1 Check points
G0764811
7.1.1 Before start
1. Check that the hook bolts of the outlet, the
screws o f the frame hood and the cen t ring
ring are al l tig ht ened.
2. Check that inlet device is tightened.
3. Check the oil lev el.
7.1.2 Start and run-up
4. Start the separator.
OFF
S0118021S0118111S0117911
ON
START
5. Check the direction of rotation of the bowl
(see revo lut ion counter).
52
S0121111S01182 11
7 Operating routine 7.1 Check points
6. Chec k th at w at er flows from t he oil cooling
coil and t he axial seals .
DANGER
Abnormal vibration of the
machine during run-up may be
due to wro ng assembl y or bad
cleaning of the bowl.
If so, stop the machine
immediately and inspect the
bowl.
7. Choose production mode when the separator
is ready for production.
7.1.3 Separation
• Check th at t he m achine ha s co rrect inlet and
outlet pressures.
S0120911S0055611S0121011S0121011
• Check th e t hroughput .
• Make sure that air is not sucked into the feed
line.
7.1.4 Cleaning
Cleaning of m ac hine after s eparation is
imperative.
8. When rinsing wit h water, set the progra m m e
selector to “CIP WATER”. Discharges will
now follo w at preset inter v als .
When washing with detergent, set the
programme selector to “CIP LYE / ACID”.
Discharges will now t ak e place at preset
interva ls .
Check that detergent is flowing from the axial
seals.
To effect a manual ejection, press the button
for ejection (sediment discharge).
53
7.1 Check points 7 Operating routine
7.1.5 Stop
Do not stop separator uncleaned, since it will lead
to that manually cleaning has to be done before
start up.
The bow l m us t be closed and filled with liquid
during the run down period. Water is fed to the
axial sea ls automatically until the bowl has
stopped.
9. Stop the separator.
The brake is automatically energized. The cooling
water is s hut off and the brak e is disenga ged
automatically when the bowl has stopped.
WARNING
S005 0111G0246241
Do not loosen any parts on
the mach ine until the bo wl
has stopped completely
(= the revolution counter is at a
stand still).
DANGER
Emergency stop
If the machine begins t o v ibrate during
operation, stop it im m ediately ke eping the
bowl fille d w it h liquid.
54
8 T rouble tracing
Contents
8.1 Mechanical function 56
8.2 Sediment discharge function 59
8.2.1 OWMC related faults 60
8.3 Axial seals 61
55
8.1 Mechanical function 8 Trouble tracing
8.1 Mechanical function
(except sediment discharge
function and axial seals)
During a s t art , th e f ollowing func t ions are
disconnected: Overload protection (bimetal relay)
and overc urrent pro te c t ion (when star
connec t ion).
Indication Cause Remedy
Start
No control voltage Power sup ply f ailure. Fuse s in
control panel have blown or
tripped
Separator motor does not
start
Smell of burning Brake not re leased Check the air pres s ure to
Motor stops during start-up
due to overheating
Unusually long running-up
period
Unusually long running-up
period or starting current
too high
Thermist or relay not operating Check. Remedy
Thermistor relay tripped before
start
Wrong motor or motor def ec t Change or repair mo to r
Thermist or relay trips d ue t o
repeated s t art s of m ot or
Relay in sta rt er has not
switched over from star to
delta
Product admitted too early Check. Remedy
Supply vo lta ge too low Check. Remedy
Find the fault. Change or reset
fuse
Motor too hot. See below
brake
Remove m ot or hood. Al low
motor to cool down (at least 3
hours – if no ex tr a f an c ooling)
Check se tting of relay
Unusually short running-up
period
56
Motor defect Check. Remedy
Relay in starter has switched
over from star to delta too soon
Overvoltage of power supply Check. Remedy
Motor defect Check. Remedy
Check relay setting
8 Trouble tracing 8.1 Mechanical function
Indication Cause Remedy
Noise and possibly vibration D amaged b all bearing Check and ch ange bearin g
Worm gear b adly worn Change worm and w orm w heel
Height settings of paring disc
are incorrect
Incorrect assembly See
Stop the separator with water or product and find out the cau s e
Vibration Bowl out o f b alance due to:
Bad cleaning – incor rec t
assembly – badly tightened
lock ring – disc stack not
clamped sufficiently – bowl
assembled with parts from
other bow ls – s ta t ic unbalance
Moderat e v ibration at th e c rit ic al speeds during starting and
stopping periods is normal
Operation. CIP
Machine vibrates (vibration
alarm)
Low level
Bowl out of balance due to bad
cleaning – incorrect
assembling – bad tightening of
lock ring – b ow l assembl ed
with parts from several bowls –
heavyside
Correct settings, see
Mainten ance Manual
Mainte nance Manual
Stop immediately and find out
the cause. Insufficient
tighteni ng of the lock ring can
endanger life. Dismantle, clean
and reass emble. (See
& Mainte nance Manual
Establish the caus e at next
stop
Service
)
Machine vibrates (vibration
alarm)
High level
Vibration dampers worn
Foundat ion too weak
Damage d or worn bea rings.
Overheat ing
Bowl out of balance due to bad
cleaning – incorrect
assembling – bad tightening of
lock ring – b ow l assembl ed
with parts from several bowls –
heavyside
Vibration dam pers worn Stop immediately as above.
Foundat ion too weak Stop imm ediately as above.
Damage d or worn bea rings.
Overheat ing
Stop immediately w it h liquid
filled bowl, absolutely no
dischar ging, and est ablish the
cause. Badly tighte ned lock
ring may inv olv e fatal danger
Renew
Reinfor ce fo undation
Stop immediately as above
Renew
57
8.1 Mechanical function 8 Trouble tracing
Indication Cause Remedy
Speed too low
Damage d or w orn bearings.
Overheat ing
Stop immediately as above
Renew
Noise
Smell
Overheated motor Poor coolin g Reme dy
Speed too high Power sup ply f requency t oo
Check. Remedy
high
Motor defect Check. Remedy
Speed too low Voltage drop of power supply Check and remedy the fau lt
Open bowl = ov erloading of
moto r. Bowl leakin g
See ‘‘8.2 Sedime nt dis c harge
function” on page 59
Water in worm gear housing Condensation
Leakage of oil cooling coil Change or repair t he coil
Stopping
Braking time too short Pressure of air t o brake is too
Check. Remedy
high
Bowl is leaking See ‘‘8.2 Sediment dis c harge
function” on page 59
Motor defect Check. Remedy
Defect in driving device Check. Remedy
Braking time is too long Worn or oily brak e lining Chang e or c lean
Pressure of air t o brake is too
Check. Remedy
low or air sup ply not turned on
Moderate vibration at the critical speeds during starting and
stopping is normal
,
58
8 Trouble tracing 8.2 Sediment discharge function
8.2 Sediment discharge
function
Indication Cause Remedy
The bowl does not eject or
the volume is too small
The bowl does not close No water in the ope rating
Air bubbl es in piping between
the OWMC and the separator
Operating water leak age
through v alv e plugs in
operating slide or seal ring in
sliding bowl bottom
When int erv als betwee n
discharges are long (≥ 1 h) the
operating mechanis m m ay
seize
Incorrect operating pres s ure
and time adjustment
water tank or t he pressure
from the reducing valv e is
insufficien t
The valve plugs in ope rating
slide leak
Purge the system for air
Change t he seals
Discharge twice in order to
reset the system to normal
volume
Correct
Check the water supply. Adjust
the pressure to maximum
value (approx. 70 kP a) but
avoid leak age (max 50 l/h)
Change t he valve plugs
The discharge volume
increases
The seal ri ng in the sliding
bowl bottom leaks
Impurities under the sliding
bowl bottom
Seizure on the bowl nave Remed y a c co rding to
The seal ring for bowl hood
leaks
This may oc c ur if leakage of
operating water inc reases due
to readjustment of operating
water pressure
Change t he seal ring
Clean
instructions for maintenance
Change t he seal ring
Run the separator with
constant operating wa t er
pressure
59
8.2 Sediment discharge function 8 Trouble tracing
8.2.1 OWMC related faults
Indication Cause Corrective actions P age
The bowl does not eject
or the volume is too
small
OWMC piston does not
return to its initial
position or returns too
slowly
Needle va lv e f or s et t ing of
small disc harge is throt tl ed
too m uch
Air pressu re f or s etting of
large disch arge is too low
No supply or signal air to
the OWMC
Faulty che c k va lv e in
operating w ater feed line
before the OW M C inlet
Impurities in w ater or air
which increase friction
between pis t on and
cylinder
Too low ope rating water
pressure in th e f eed line
before the OW M C
Adjust the t hrottling 40
Adjust the air pressure 40
Check the air supply –
Check function of the valve –
Follow the instructions
carefully f or air and water
quality.
Clean and lubricate piston
and cylin der with
GLEITMO 1821V
Check th e operating wa t er
pressur e
1)
2)
3)
The discharged volume
too large
Bowl fails to close after
sediment discharge
1) See
2) See
3)
Installat ion Manual
“Operating water m odule (OWMC)”
in
Service & M aintenance Manual
See Installation Manual, “Connection
list”
, connection 375
Silencer fo r air outlet in th e
OWMC is clogged
Faulty che c k va lv e in
operating w ater feed line
before the OW M C inlet
Faulty sea ling for the twopulse adapter
Too high pressure of the air
supply (50 6a).
Clogged nozzle fitted in the
two-pulse adapter
Renew the silencer –
Check function of the valve –
Renew the sealing 2)
pos. 8
Reduce the air pressure 40
Clean the nozzle 2)
60
8 Trouble tracing 8.3 Axial seals
8.3 Axial seals
Indication Cause Remedy
Product discharging through
cyclone outlet during
operation
(twin phase separators)
Product discharging through
cyclone outlet during
operation
(single phase separators)
Bowl is ope n or untight See ‘‘8.2 Sediment disc harge
function” on page 59
Outlet seals are leaky
• Remo v e pipes (1) an d (6).
• Check fo r leakage at (2)
and (7).
• Light phase leakage – seal
(4) leaky.
• Heavy phase leakage –
seal (5) leaky.
• Heav y p hase leakage in
cyclone outlet – axial se al
(3) leaky.
Excha nge the defec tive sea l.
See also below.
G0699311
Bowl is ope n or untight See ‘‘8.2 Sediment disc harge
function” on page 59
Outlet seal is leaky • Remov e pipe (2).
• Product leakage in cyclone
outlet – axial seal (1) lea k y.
Excha nge the defec tive sea l.
See also below.
Product flows from cooling
water outlet of inlet
G0699321
Inlet seal is leaky Exchan ge the seal. S ee also
below
61
8.3 Axial seals 8 Trouble tracing
Indication Cause Remedy
Leaky seals Normal wear –
Separa tor has be en run wit hout
contact between seals and
liquid
Deposits have formed on seals
because of insufficient cleaning
progr amme
Bowl is out of balance* See ‘‘ Machine vibrates
Frame hood is not cen t ered in
relation to the outle t pipe*
High product outlet pressures
(e.g. be c ause a disch arge
conduit has been clos ed
unintentionally
* Does not refer to the inlet seal
Seals must never run dr y.
Always ch ec k th at liquid is fed
to th e seal s
Adjust the c leaning programme
(vibration alarm)” on pa ge 57
Adjust the c entering rin g
The axial seals must not be
subjected to pressu res above
600 kPa (6 bar).
62
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