OBL MB Series User manual

SERIE
MB
MC
LOØ XO ÑAØN HOÀI
SPRING RETURN
MECHANICAL DIAPHRAGM METERING PUMPS
SOÁ COÂNG TAÙC
JOB No
KIEÅU BÔM
PUMP TYPE
Soá.
Trang
KIEÅU ÑIEÀU KHIEÅN ÑIEÄN/ ELECTRIC ACTUATOR TYPE
19
OVERALL DRAWING
MLY 18
MLK 19
MLN 20
20
PUMPHEAD SECTIONAL DRAWINGS
MLY (AISI) 21
MLY (PVC) 22
MLK/MLN 23
20
MECHANISM SECTIONAL DRAWINGS
MLY 24
MLK 26
MLN 28
/
ENCLOSES
SERIAL/No
Tieáng vieät
English
BÔM ÑÒNH LÖÔÏNG
MAØNG CÔ HOÏC
BÔM ÑÒNH LÖÔÏNG
MAØNG CÔ HOÏC
KÍCH THÖÔÙC TOÅNG THEÅ
HÌNH VEÕ ÑAÀU BÔM
HÌNH VEÕ PHAÀN CÔ KHÍ
KEØM THEO
MUÏC
SEÂRI/No
SOÅ TAY VAÄN HAØNH /
OPERATING MANUAL

1MOÂ TAÛ BÔM
DESCRIPTION OF THE PUMP 1
LÖU LÖÔÏNG
FLOW RATE 1
ÑIEÀU CHÆNH BAÈNG TAY
MANUAL ADJUSTMENT 2
ÑAËC TÍNH ÑOÄNG CÔ PHUÏ THUOÄC VAØO KÍCH CÔÕ BÔM
MOTOR CHARACTERISTICS 2
TÍCH CHAÁT CHUNG
GENERAL CHARACTERISTICS
5ÑIEÀU KHIEÅN ÑIEÄN “Z9”
ELECTRIC ACTUATOR “Z9” 15
ÑIEÀU KHIEÅN ÑIEÄN
ACTUATOR
4BAÛO DÖÔÕNG ÑÒNH KYØ
ROUTINE MAINTENANCE 12
BAÛO DÖÔÕNG PHOØNG NGÖØA
PREVENTIVE MAINTENANCE 13
THAÙO LAÉP VAN
DISMANTLING (AND REASSEMBLY) 13
SÖÏ COÁ KHI VAÄN HAØNH
OPERATING TROUBLES 14
BAÛO DÖÔÕNG
MAINTENANCE
3TRÖÔÙC KHI KHÔÛI ÑOÄNG
BEFORE STARTUP 10
KHÔÛI ÑOÄNG BÔM
PUMP STARTUP 10
MOÄT SOÁ SÖÏ COÁ THÖÔØNG XAÛY RA KHI KHÔÛI ÑOÄNG BÔM
POSSIBLE TROUBLES DURING STARTUP 11
KHÔÛI ÑOÄNG
STARTUP
CHÆ DAÃN LAÉP ÑAËT BÔM ÑUÙNG QUY CAÙCH
2
INSTRUCTIONS FOR A CORRECT INSTALLATION OF THE PUMP 3
ÑÖÔØNG OÁNG HUÙT
SUCTION LINE 3
BOÄ LOÏC ÑAÀU HUÙT
SUCTION SIDE FILTER 4
ÑÖÔØNG OÁNG HUÙT VÔÙI DUNG DÒCH COÙ ÑOÄ NHÔÙT
SUCTION PIPING FOR VISCOUS LIQUIDS 5
ÑÖÔØNG OÁNG ÑAÅY
DISCHARGE LINE 6
VAN AN TOAØN
RELIEF VALVE 6
LAÉP ÑAËT THIEÁT BÒ TIEÂU XUNG
INSTALLATION OF THE PULSATION DAMPER 7
LAÉP ÑAËT ÑOÀNG HOÀ ÑO AÙP LÖÏC
INSTALLATION OF THE PRESSURE GAUGE 8
HEÄ THOÁNG LAÉP ÑAËT CHUAÅN
STANDARD PLANT ARRANGEMENT 8
TRA DAÀU HOÄP GIAÛM TOÁC
CASING OIL FILLING UP 9
LAÉP ÑAËT
INSTALLATION
MUÏC LUÏC
INDEX

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Theoretical flow rate
The theoretical flow rate corresponds
exactly to the volume displaced by
the diaphragm during its motion. Its
graphic representation is a diagonal
straight line whose progression is
determined by the diaphragm stroke
increasing(fig.3).
Actual flow rate
The actual flow rate is inevitably less
than the theoretical flow rate because
of the losses due to the reaction time
of the valves. The ratio between these
two flow rates determines the volume-
tric efficiency of the pump. The effi-
ciency depends on pump size, pump
head type (plunger or diaphragm),
liquid to be pumped, viscosity of the
liquid, working pressure, etc. (Fig.4)
H. 2
H. 3
0° 50° 100°
10
5
H. 4
0° 50° 100°
10
5
PORTATA
ISTANTANEA
SNAPSHOT
FLOW RATE
FLOW RATE PER HOUR
TRAÏNG THAÙI HUÙT
SUCTION
CHU TRÌNH HOAØN CHÆNH ThÖÙ 1
1° COMPLETE CYCLE
CLOSED
OPEN
OPEN
CLOSED
0° 180° 360°
2° COMPLETE CYCLE
The adjustment of the diaphragm stroke is
stepless and regular, and can be carried
out any time, i.e. when the pump stands
still or is running.
Ñieàu khieån baèng tay Manual adjustment
Flow rate manual adjustment
with mobile graduated knob
H. 5
In table Bare described motors
installed on MB/Mcpumps.
Endless screw is directly keyed
on extended motor shaft.
Ñaëc tính ñoäng cô Motor characteristic
Baûng B Table B
ÑOÄNG CÔ GAMA
GAMAR MOTOR SPECIAL FLANGE AND SHAFT
KIEÅU BÔM PHA
kW
CÖÏC KÍCH THÖÔÙC
VOLT Hz
PUMP TYPE PHASES POLES
SIZE
MB BA PHA
0,20 4 63 50/60
THREEPH
230
400
MC
MOÄT PHA
0,30 4 63 50/60
THREEPH
230
400
,0 24 4 63 230 50
MB 0,24 4 63 230 60
MC SINGLEPH 0,24 4 63 110 50
0,24 4 63 110 60
STANDARD
Löu löôïng treân lyù thuyeát baèng
ñuùùng theå tích do maøng bôm
chieám trong quaù trình chuyeån
ñoäng. Ñoà thò ñaëc tröng laø moät
ñöôøng thaúng maø caùc ñIeåm cuûa
ñöôøng thaúng ñöôïc xaùc ñònh bôûi
soá taàn suaát cuûa maøng (H. 3)
Söï hieäu chænh taàn suaát maøng bôm laø
lieân tuïc, vaø coù theå thöïc hieän taïi baát cöù
thôøi ñIeåm naøo, ví duï khi bôm nghæ
hoaëc ñang laøm vieäc.
Trong baûng Blaø caùc ñoäng cô
ñöôïc laép treân bôm MB/ MC.
Vít cam ñöôïc gaén tröïc tieáp
treân truïc ñoäng cô
GIAI ÑOAÏN ÑAÅY
DISCHARGE STAGE
GIAI ÑOAÏN HUÙT
SUCTION STAGE
Löu löôïng thöïc teá chaéc chaén laø
nhoû hôn löu löôïng treân lyù thuyeát
bôûi vì toån thaát sinh ra do thôøi gian
treã ñoùng môû cuûa caùc van. Tyû soá
giöõa hai löu löôïng xaùc ñònh hieäu
suaát theå tích cuûa bôm. Hieäu suaát
naøy phuï thuoäc vaøo kích thöôùc cuûa
bôm, kieåu ñaàu bôm, (maøng hay
piston), dung dòch bôm, ñoä nhôùt
cuûa dung dòch, aùp löïc laøm vieäc..
Löu löôïng treân lyù thuyeát
Löu löôïng thöïc teá
ÑAËC TÍNH CHUNG
GENERAL CHARACTERISTICS
1
5
ÑOÙNG MÔÛ
MÔÛ ÑOÙNG
LÖU LÖÔÏNG
TREÂN GiÔØ
CHU TRÌNH HOAØN CHÆNH ThÖÙ 2
LÖU LÖÔÏNG / FLOW RATELÖU LÖÔÏNG / FLOW RATE
LÖU Ö ÏNG TÍN TOAÙN /LÔ H
ÖLÔ THCEÁL U Ö ÏNG ÖÏ T /
UÏ NLÖ LÖÔNG TÍ H TOAÙN /
TH.FLOWRATE
.TH FLOWRATE
AC LFOW
RATE
Ñieàu chænh löu löôïng baèng tay vôùi
nuùm ñieàu chænh chia ñoä
MAËT BÍCH VAØ TRUÏC ÑAËC BIEÄT
BA PHA

Vieäc laép ñaët ñuùng quy caùch vaø kích thöôùc oáng huùt ñaëc bieät
quan troïng ñeå vaän haønh bôm an toaøn.
Caùc yeáu toá sau caàn phaûi ñöôïc tính ñeán:
A) Ñöôøng kính trong cuûa oáng ñöôïc choïn
theo löu löôïng bôm (Baûng C).
Caùc ñaàu noái bôm coù kích thöôùc lôùn hôn
cho caùc öùng duïng khaùc nhau.
B) Chieàu daøi cuûa oáng.
Chieàu daøi oáng huùt caøng ngaén caøng toát.
Vaø chieàu daøi phuø hôïp nhaát theo baûng C:
Chieàu saâu huùt lôùn nhaát laø 1,5 m
Toång chieàu daøi cuûa oáng huùt: 2,5m
C) Sô ñoà kieåu laép ñöôøng oáng huùt.
Xem hình minh hoaï H. 7
n
n
Maët baèng laép ñaët thieát bò phaûi saïch seõ vaø an toaøn cho vieäc vaän
haønh vaø baûo döôõng thieát bò. Chuù yù ñeán
khoaûng khoâng ôû phaàn ñaàu huùt, ñaàu ñaåy
cuûa bôm vaø nuùm ñieàu chænh (H 6).
Neáu bôm ñöôïc laép ñaët ôû ngoaøi trôøi thì
caàn thieát phaûi coù maùi che, ñaëc bieät laø khi
bôm ñuôïc keát noái vôùi caùc thieát bò khôûi
ñoäng ñieän vaø caùc thieát bò ñieàu khieån
khaùc.
Ñaàu bôm baèng nhöïa PVC chæ coù theå
laøm vieäc ôû nhieät ñoä moâi tröôøng vaø nhieät ñoä dung dòch toái ña laø
0
40 C. Neáu caàn thieát thì coù theå söû duïng theâm thieát bò che bôm
khoûi aùnh naéng maët trôøi vaø kieåm tra nhieät ñoä cuûa dung dòch.
Chæ daãn laép ñaët ñuùng quy caùch
Provide with adequate clearance areas and safe access for
operation and maintenance, in particular
in front of the hydraulic side and of the
adjustment knob (fig. 6).
If the pump is installed outdoors, a
shelter is recommended, specially
when the pump is equipped with electric
actuators or other delicate devices.
PP pump heads can work properly only
at ambient temperature and metered
0
liquid temperatures below 40 C. If neces sary, provide suitable
protection from sun rays and check the temperature of the
metered liquid.
Instructions for a proper installation
H. 6
HYDRAULIC SIDE
ADJUSTMENT SIDE
A proper installation and sizing of the suction line are of particular impor-
tance for a correct operation of the pump.
The following factors shall be taken into account:
A) Pipe inner diameter
The pipe inner diameter will be chosen as a
function of the pump flow rate (see table C).
The pump connections are oversized, in
order to cover all applications.
B) Length of piping
Suction piping is to be as short as
possible. Following the indications of
table Cit issuggested:
lMax suction lift 1,5 metres
lTotal length 2,5 metres
(upright plus horizontal)
C) Arrangement of the suction line
For the arrangement of the suction line see fig.7.
Suction lineÑöôøng oáng huùt
Baûng C Table C
0÷15 4x6 - - -
0÷30 6x10 - 1/4"-
0÷125 -
DN 10 3/8"φ16
0÷155 -
DN 15
1/2"
1/2" ANSI
0÷260 -
DN 20
3/4"25
3/4" ANSI
0÷420 -
DN 25
1"32
1" ANSI
Moái töông quan giöõa löu löôïng
vaø kích thöôùc oáng
Relationship between flow rate and pipe size
LÖU LÖÔÏNG
FLOW RATE
L/h
PIPE WITH
FITTINGS FLANGED PIPE THREADED PIPE PVC GLUED PIPE
H. 7
VAN LOÏC
FILTER FOOT VALVE
KÍCH THÖÔÙC LAÉP ÑAËT / ASSEMBLING AREA
Ñuùng
Right
Ñuùng
Right
Sai
Deã bò taéc bôm
Wrong
Risk of clogging of pump valves
Sai
Taïi ñIeåm cao nhaát oáng daãn dung
dòch bò gaãy
Wrong
In the highest point the fluid vein
breaks
LAÉP ÑAËT
INSTALLATION
2
6
20
φ
φ
φ
PHAÀN THUYÛ LÖÏC
PHÍA ÑIEÀU CHÆNH
ÑAÀU NOÁI
OÁNG
OÁNG NOÁI
BÍCH OÁNG NOÁI
REN OÁNG NOÁI
NHÖÏA
800 700

Right
Pipe size is in accordance
with table C
Ñuùng
Right
Right
Right
Boä loïc ñaàu huùt
The installation of a filter on the suction side is always advisable,
particularly when the liquid to be metered contains suspended
particles.
Caution:
A small-sized filter will affect the metering
performances.
Use Y- filters with a size larger than the
suction connection.
The characteristics of the filter net depend on the kind of liquid and
pump flow rate.
For liquids with viscosity not exceeding 200 cps see table D.
To prevent sucking of impurities, specially when liquids with
suspended matters are metered, the suction pipe shall not
draw the liquid from the bottom of the tank. The suction point
should be 10 cm from the tank bottom (fig.8).
Suction side filter
1÷15 40
15÷50 40
100÷200 30
200÷420 20
Löu löôïng Max L/h
Max flow rate L/h Mesch
Tabella D Table D
Sai
Laép ñaët sai kích thöôùc ñöôøng oáng
theo baûng C.
Wrong
Pipe size not in accordance table C
Sai
Kieåu ñöôøng oáng laép ñaët sai.
Wrong
Irregular suction
Sai
Wrong
Sai
Wrong
Sai
Wrong
Laép ñaët boä loïc taïi ñaàu huùt cuûa bôm ñònh löôïng luoân luoân caàn
thieát, ñaëc bieät laø khi dung dòch bôm coù chöùùa caùc taïp chaát raén
lô löûng.
Chuù yù:
Moät boä loïc coù kích côõ nhoû seõ laøm aûnh höôûng
ñeán hieäu suaát bôm
Söû duïng boä Yloïc coù kích thöôùc lôùn hôn so vôùi
kích thöôùc cuûa oáng.
Tính chaát cuûa maøng loïc thì phuï thuoäc vaøo loaïi chaát loûng vaø löu
löôïng cuûa bôm.
Ñoái vôùi dung dòch coù ñoä nhôùt döôùi 200 cps thì tham khaûo baûng
D.
Ñeå traùnh caùc haït coù kích thöôùc lôùn khi ñònh löôïng caùc dung
dòch coù chöùa caùc haït huyeàn phuø thì ñöôøng oáng huùt cuûa bôm
khoâng ñöôïc laáy ôû ñaùy thuøng chöùa maø ñieåm huùt phaûi caùch ñaùy
thuøng ít nhaát laø 10 cm (H.8).
Ñuùng
Suggested installation
Suggested installation
Kieåu laép ñaët coù theå chaáp nhaän
Acceptable installation
Laép ñaët toát nhaát
Laép ñaët toát nhaát
2
7
LAÉP ÑAËT
INSTALLATION
H. 7
Ñuùng
Kích thöôùc loã
Ñuùng
Laép ñaët ñuùng kích thöôùc
ñöôøng oáng theo baûng C.

Moät soá ñieàu caàn phaûi löu yù khi laép ñaët bôm cho dung dòch coù ñoä
nhôùt cao:
Ñoái vôùi loaïi öùng duïng naøy thì chuùng toâi kieán nghò laø neân söû duïng
ñaàu bôm baèng inox.
Ñoái vôùi tröôøng hôïp ñoä nhôùt cao thì van ñaàu ñaåy neân laø van loø xo.
Ñoái vôùi ñöôøng oáng ñaàu huùt thaûì phi coù kích thöôùc hôïp lyù. Vôùi
tröôøng hôïp ñoä nhôùt cuûa dung dòch lôùn:2000 cps thì löïa choïn kích
thöôùc oáng huùt lôùn hôn so vôùi kích thöôùc ñaàu huùt cuûa bôm.
Trong moïi tröôøng hôïp khi bôm dung dòch coù ñoä nhôùt thì löïa
choïn ñöôøng oáng huùt coù kích thöôùc ít nhaát laø baèng vôùi kích thöôùc
cuûa ñaàu noái cuûa bôm
n
n
n
n
NO
NO
Ví duï cho laép ñaët thieát bò loïc Examples of installation of the filter
Ñöôøng oáng huùt vôùi dung dòch coù ñoä nhôùt
Specific technical information is required for the installation of
pumps intended for metering viscous liquids:
For this kind of application we recommend stainless steel
pumpheads.
Spring-loaded discharge valves are also recommended in the
event of high-viscosity liquids.
The suction piping must have an adequate diameter; as a rule, for
high-viscosity liquids (2000 cps), select the size immediately above
the diameter of the pump suction connections.
In any case, when viscous liquids are to be metered choose for
the pipe at least the same size as that of the pump connections.
l
l
l
l
Examples of installation for viscous liquids.
Suction piping for viscous liquids
H. 9
Hình. 8
Sai
Wrong
Sai
Wrong
Ñuùng
Right
Ñuùng
Right
Ví duï cho laép ñaët vôùi dung dòch coù ñoä nhôùt
Sai
Wrong
Sai
Wrong
Sai
Wrong
Khuyeán caùo
Recommended
Khuyeán caùo
Recommended
Ñuùng
Right
2
8
INSTALLATION
LAÉP ÑAËT

Relationship between strokes per minute
"SPM" and viscosity of the liquid "cp",
valid for AISI 316L or PP.11 pump heads.
36 1000
50 800
70 300
95 150
115 50
155 10
Taàn suaát / phuùt Ñoä nhôùt (cps) Max nhoùm A
S.P.M. cps max execution "A"
Baûng E Table E
Ñöôøng oáng ñaåy
When the free surface of the liquid in the suction side tank is
above discharge-side tank level, an uncontrollable flow from the
suction side tank to the discharge side tank will occur.
To prevent this natural passage of liquid, the discharge pressure
must always be at least 0,3 Kg/cmq, higher than the suction
pressure, in case of small flow rates 0,5 Kg/cmq
If for any reason this condition cannot be complied with the plant it
is necessary to create a backpressure by means of a suitable
valve, or better to highten the discharge pipe so as to prevent the
siphoning effect (fig. 10).
Discharge line
VAN TAÏO AÙP LÖÏC NGÖÔÏC
BACKPRESSURE VALVE
ÑAÀU CHAÂM
INJECTION NOZZLE
Laép ñaët
ñuùng
Right
Right
Mechanical diaphragm metering pumps absolutely need the
installation of a relief valve; a pressure higher than the rating
plate value would break the mechanism.
l The safety valve has to be installed immediately after the dis-
charge connection, anyhow before the on-off valve.
l The relief valve setting (set pressure) must not exceed the pump
max. pressure value.
Relief valveVan xaû aùp
Moái töông quan giöõa taàn suaát “SPM” vaø
ñoä nhôùt dung dòch cps coù taùc duïng cho
theùp AI51 3 1 6L hoaëc nhöïa PP hoaëc PP11.
Khi maø beà maët dung dòch bôm trong beå huùt cao hôn coát cuûa beå
chöùa thì seõ xuaát hieän moät doøng chaûy khoâng kieåm soaùt ñöôïc töø beå
huùt sang beå chöùa.
Ñeå traùnh hieän töôïng naøy thì aùp löïc ñaàu ñaåy phaûi lôùn hôn ít nhaát
0,3 bar so vôùi aùp löïc cuûa ñaàu huùt, trong tröôøng hôïp löu löôïng nhoû
thì ñoä cheânh aùp phaûi laø 0,5 bar.
Trong tröôøng hôïp khoâng ñaùp öùng ñöôïc caùc ñieåu kieän treân thì caàn
thieát phaûi laép ñaët moät van ñeå taïo ra aùp löïc ngöôïc hoaëc toát hôn heát
laø khoaù chaët oáng ñaàu ñaåy ñeå traùnh hieäu öùng siphoâng (H.10).
H. 10
Sai
Hieäu öùng siphong khoâng theå
kieåm soaùt ñöôïc löu löôïng
Wrong
Siphoning Uncontrollable flow rate.
Sai
Khoâng coù van taïo aùp ngöôïc, doøng löu
löôïng trong oáng “A” keùo dung dòch töø
thuøng chöùa maø khoâng kieåm soaùt ñöôïc
Wrong
Failing a back pressure valve, the flow in
pipeline "A" draws the product from the
tank in an uncontrolled way
Bôm ñònh löôïng maøng cô hoïc phaûi laép theâm moät van xaû aùp;
moät aùp löïc cao hôn aùp löïc laøm vieäc toái ña cuûa maøng seõ laøm
hoûng cô caáu maøng.
Van an toaøn caàn ari ñöôïc laép ñaët ngay sau ñaàu ñaåy cuûa bôm,
taát nhieân laø tröôùc van ñoùng ngaét.
AÙp löïc van (aùp löïc ñaët) khoâng vöôït quaù aùp löïc lôùn nhaát cuûa bôm
l
l
2
9
INSTALLATION
LAÉP ÑAËT
Laép ñaët
ñuùng

The relief valve protects the pump against:
Excessive preesive (pressure higher than
rated value).
Operator mistakes (i.e., on-off valve
closed on the discharge line when the
pump is running).
Obstruction of the discharge piping
(reduction in section, clogging).
A relief valve is absolutely necessary when
an on-off valve is fitted on the discharge
line (fig.11).
Anyway, the installation of a safety valve
is always essential both because of the
above reasons and for the safety regula-
Tion for accident at work.
H. 11
VAN ON/OFF
ON-OFF VALVE
VAN AN TOAØN
SAFETY VALVE
The pulsation damper is decisive for a proper operation of the
metering pumps.
The installation of a pulsation damper offers several advantages
because this device:
Protetects the metering pump against pressure peaks, thus
increasing the working of life of the pump.
Prevents vibrations along the discharge line.
Smooth the flow, useful for the process.
Pulsating flows, which are negative characteristic of all metering
pumps, can therefore be prevented by installing a pulsation
damper on the discharge line (fig.12).
Examples of installation of the pulsation damper
Ví duï veà laép ñaët thieát bò tieâu xung
Installation of the pulsation damper
Laép ñaët thieát bò tieâu xung
VAN AÙP NGÖÔÏC
BACKPRESSURE VALVE
VAN XAÛ
DAMPER
DRAIN VALVE
DAMPER
DRAIN VALVE
SPRAY NOZZLE
ÑOÀNG HOÀ ÑO AÙP
(ÑAËC BIEÄÂT CAÀN THIEÁT
PRESSURE GAUGE
(ABSOLUTELY NECESSARY)
DAMPER
DRAIN VALVE
DAMPER
DRAIN VALVE
lVan xaû aùp baûo veä bôm trong caùc tröôøng hôïp sau:
AÙp löïc dö (aùp löïc cao hôn giaù trò cho pheùp).
Loãi ngöôøi vaän haønh (Ví duï: Van ñoùng ngaét
ñoùng khi maø bôm hoaït ñoäng thì van seõ xaû ra
ngoaøi)
Taéc oáng ñaåy (Giaûm tieát dieän ñöôøng oáng,
gaây taéc). Hình 11
Neáu coù van on/off treân ñöôøng oáng ñaåy thì
caàn laép theâm 01 van xaû aùp Hình 11
Tuy nhieân, vieäc laép ñaët van an toaøn luoân
luoân caàn thieát vì caùc lí do treân vaø ñeå an
toaøn trong quaù trình hoaït ñoäng cuûa bôm.
Thieát bò tieâu xung ñoäng laø moät phaàn thieát bò raát quan troïng ñeå bôm
ñònh löôïng hoaït ñoäng toát.
Vieäc laép ñaët thieát bò tieâu xung mang laïi moät soá tieän ích sau:
Baûo veä cho bôm khoûi aùp löïc phaûn hoài, keùo daøi tuoåi thoï cuûa bôm.
Traùnh rung ñoäng doïc theo ñöôøng oáng ñaåy.
Laøm cho doøng chaûy ñeàu, coù lôïi cho coâng ngheä söû duïng
Dao ñoäng xung cuûa löu löôïng, laø moät tính chaát coù haïi ñoái vôùi taát caû
caùc loaïi bôm ñònh löôïng, bôûi vaäy coù theå traùnh hieän töôïng naøy ta
laép theâm boä tieâu xung ôû ñaàu ra (H12)
Hình. 12
Löu löôïng khoâng coù thieát bò
tieâu xung
Flow rate diagram (without
damper)
AÙp löïc laøm vieäc hôn 1 bar
Installation with Working
pressure higher than 1 Bar
Ñöôøng oáng ñaåy quaù
daøi vaø to
Discharge line too long and
winding
Löu löôïng vôùi thieát
bò tieâu xung
Flow rate diagram
(with damper)
Laép ñaët vôùi aùp löïc
laøm vieäc nhoû hôn 1
bar
Installation with
working pressure
lower 1 Bar
Laép ñaët ñaàu phun tia
Spray nozzle
installation
ÑAËC TÍNH CHUNG
GENERAL CHARACTERISTICS
2
10
VAN XAÛVAN XAÛ
ÑAÀU VOÂI PHUN
VAN XAÛ

Kieåu daäp xung Damper types
Bottle damper
Is made up of a cylindrical-shape barrel developed in its height.
Damper volume: about 35 times the pump swept volume.
Advantages:
It does not need precharge because is self-running.
Disadvantages:
It has to be regenerated periodically by releasing the liquid through the
drain valve in order to restore the air absorbed by the liquid.
Bladder type damper
The liquid is separed from the relieving chamber by a diaphragm.
Damper volume: about 8 times the pump swept volume .
Advantages:
Small volume.
No need for periodic inflation because the gas is contained in the bladder.
Disadvantages:
It is necessary to know prior the working pressure in order to determine
the damper precharge.
In order to check if the metering pump
operates correctly, it is essential to install
a pressure gauge on the discharge line.
(Fig.13).
The pressure gauge shows the actual work-
ing pressure of the metering pump. This
value must not exceed the max. pressure of
the pump.
Fig.14 shows
the indications
for a correct
installation of
the metering
pumps.
Laép ñaët ñoàng hoà ño aùp löïc Installation of the pressure gauge
H. 13
VALVOLA
DI SICUREZZA
SAFETY VALVE
VALVOLA
DI SCARICO
DRAIN VALVE
MANOMETRO
PRESSURE GAUGE
Heä thoáng laép ñaët chuaån Standard plant arrangement
H. 14
Daäp xung kieåu bình
Cheá taïo theo daïng hình troøn
Theå tích bình: vaøo khoaûng 35 laàn löu löôïng bôm.
Öu ñieåm:
Khoâng caàn phaûi moài
Nhöôïc ñieåm:
Noù caàn phaûi ñuôïc naïp khoâng khí ñònh kyø baèng caùch
thaùo chaát loûng thoâng qua moät van xaû ñeå ñöa khoâng
khí vaøo bình
Boä daäp xung kieåu boùng.
Dung dòch ñöôïc ngaên caùch vôùi buoàng xaû bôûi maøng.
Theå tích bình: 8 laàn so vôùi löu löôïng bôm.
Öu ñieåm:
Theå tích nhoû.
Khoâng caàn naïp khoâng khí ñònh kyø vì khoâng khí ñöôïc
chöùa trong quaû boøng.
Nhöôïc ñieåm:
Caàn phaûi bieát aùp löïc laøm vieäc ñeå tính dung tích boùng.
Hình 14 chæ ra
kieåu laép ñaët
chuaån.
Ñeå kieåm tra quaù trình hoaït ñoäng bình
thöôøng cuûa bôm, caàn thieát phaûi laép ñaët
01 ñoàng hoà ño aùp löïc ôû taïi ñaàu ñaåy cuûa
bôm ñoàng hoà ño aùp suaát (Hình 13)
Ñoàng hoà aùp löïc seõ chæ ra aùp löïc laøm
vieäc thöïc teá cuûa bôm. Giaù trò naøy khoâng
ñöôïc vöôït quaù aùp löïc laøm vieäc lôùn nhaát
cuûa bôm.
1- Loïc chöõ"y"
"Y" filter
2- Bôm ñònh löôïng
Metering pump
3- Van xaû aùp
Relief valve
4- Van xaû
Drain valve
5- Van ñoùng ngaét
On-off valve
6- Thieát bò tieâu xung
Pulsation damper
7- Ñoàng hoà ño aùp
Pressure gauge
2
11
LAÉP ÑAËT
INSTALLATION

Unscrew the filling plug located on the
crank housing and pour lubricating oil
into it.
Pumps are always supplied without oil.
For oil type see table F.
Tra daàu hoäp giaûm toác Crank housing oil filling up
ESSO SPARTAN EP 320
MOBIL MOBILGEAR 632
SHELL OMALA OIL 320
MB/MC 0,4 Lt
HAÕNG /
BRAND
KIEÅU / TYPE
BÔM / PUMP SOÁ LÖÔÏNG / OIL QUANTITY
Baûng F Table F
H. 15
NUÙT TRA DAÀU
OIL FILLING UP
LOÃ XAÛ DAÀU
OIL DRAIN CÖÛA SOÂÅ DAÀU
OIL WINDOW
BÔM
PUMP
MB MC
ÑAËC TÍNH CHUNG
GENERAL CHARACTERISTICS
2
12
Thaùo nuùt tra daàu ôû treân voû bôm vaø
tra daàu boâi trôn vaøo
Bôm ñöôïc cung caáp luoân luoân
khoâng coù daàu. Ñeå bieát loaïi daàu
xem baûng F

Before the startup verify the following conditions:
Make sure that the baseplate is stable and even. Do not install
the pump directly on a concrete foundation.
Fix the pump to the baseplate using the specific anchor holes in
the pump feet.
Make sure that the pump valve axis is perfectly upright.
Before connecting the piping to the pump, it is absolutely neces-
sary to flush the pipelines with water, especially the suction line
and relevant feed tank.
This preliminary flushing is often underestimated by the instal-
lator; if this operation is not properly carried out, the pump will
become a collector of all foreing matters contained in the
pipeline and tank, such as weld drops, gasket scraps, soil and
other stuff.
The pipelines must be independently supported, so as to pre-
vent stresses on the pumphead. Therefore, besides the baseplate,
the pump needs a supporting framework for both suction and dis-
charge pipelines.
Make sure that the pipeline fittings and flanges are perfectly
tight and in particular that no air enters the suction line, as this
would hinder the priming of the pump.
Act as follows:
With pump not running, check the oil through the oil window (for
oil type see table F).
Check the electric connections and also the direction of rotation
of the motor (shown by the arrow on motor body).
Make sure that all on-off valves on the suction and discharge
pipelines are open.
Make sure that the liquid to be metered has not solidified or
frozen inside the piping.
Carry out the first startup with discharge pressure as low as pos-
sible and with adjustment knob set to 20%; keep these conditions
about 3 ÷ 5 minutes. Increase gradually the flow rate up to the
maximum value, then set the pump to the required working condi-
tions (flow rate and pressure).
During the first stage check the pump discharge pressure by means of
the pressure gauge: the pressure value (max. oscillation of the pointer)
must not exceed the max. pressure indicated on the pump rating plate.
Pump startupKhôûi ñoäng bôm
Tröôùc khi khôûi ñoäng Before the startup
ùùChuù y !
Bôm khoâng theå chòu aùp löïc lôùn hôn aùp
löïc ghi treân bôm
Caution!
The pump cannot stand pressures higher than
those indicated on the rating plate.
Tröôùc khi khôûi ñoäng phaûi ñaûm baûo raèng beä ñôõ cuûa bôm
phaúng vaø chaéc chaén. Khoâng laép ñaët bôm tröïc tieáp leân neàn beâ
toâng.
Coá ñònh bôm vaøo beä ñôõ baèng buloâng taïi ñeá bôm
Ñaûm baûo raèng van cuûa bôm phaûi thaúng goùc vôùi maët ñaát.
Tröôùc khi ñaáu noái oáng vôùi bôm, caàn phaûi suùc röûa oáng baèng
nöôùc, ñaëc bieät laø ôû oáng huùt vaø beå huùt.
Thöôøng thì ngöôøi laép ñaët khoâng chuù troïng nhieàu ñeán vieäc
suùc röûa vaøo thôøi ñieåm ban ñaàu, neáu khoâng tuaân thuû ñieàu
naøy thì bôm seõ trôû thaønh boä thu raùc nhö vaûy haøn, ñaát caùt,…
Ñöôøng oáng phaûi coù boä ñôõ rieâng ñeå traùnh löïc caêng treân ñaàu
bôm. Do ñoù, ngoaøi vieäc beä ñôõ, bôm caàn phaûi coù moät khung
ñôõ cho caû oáng huùt vaø ñaåy.
Caàn kieåm tra kyõ ñaàu noái oáng hay ñaàu bích ñaõ kín khít chöa.
Neáu khoâng khí loït ñöôïc vaøo oáng thì seõ aûnh höôûng ñeán vieäc
moài bôm.
Thöïc hieän theo chæ daãn sau:
Khi bôm khoâng hoaït ñoäng, kieåm tra daàu qua maét daàu (Ñeå bieát
loaïi daàu thì xem baûng F).
Kieåm tra caùc ñaàu ñaáu noái ñieän, kieåm tra chieàu quay ñoäng cô
(Theo chieàu muõi teân treân thaân ñoäng cô).
Phaûi ñaûm baûo raèng caùc van ñoùng ngaét ôû ñaàu huùt vaø ñaàu
ñaåy phaûi ñöôïc môû.
Kieåm tra xem dung dòch bôm coù bò ñoùng raén hoaëc gaây taéc
trong oáng khoâng.
Khi laàn ñaàu khôûi ñoäng, aùp löïc ñaàu ñaåy caøng thaáp caøng toát vaø
vò trí nuùm ñieàu chænh ñaët ôû 20%, duy trì trong 3-5 phuùt. Taêng
daàn löu löôïng ñeán giaù trò lôùn nhaát, sau ñoù ñaët aùp löïc ñeán aùp
löïc laøm vieäc cuûa bôm.
Trong quaù trình vaän haønh ban ñaàu cuûa bôm, caàn kieåm tra aùp
löïc ñaàu ñaåy baèng ñoàng hoà ño aùp: giaù trò aùp löïc (Dao ñoäng
xung quanh ñieåm laøm vieäc) khoâng ñöôïc vöôït quaù aùp löïc laøm
vieäc lôùn nhaát.
AVVIAMENTO
3
13
KHÔÛI ÑOÄNG
STARTUP
Tröôùc khi khôûi ñoäng bôm caàn phaûi ñaûm baûo caùc yeâu caàu sau:

Moät soá söï coá thöôøng xaûy ra khi khôûi
ñoäng bôm
Bôm khoâng bôm dung dòch The pump does not pump
Possible troubles during startup
•Khoâng khí ñi vaøo ñöôøng oán huùt qua caùc ñaàu noái Kieåm tra
• Air entering the suction piping through the fittings: Check.
•Khoâng khí bò giöõ laïi trong bôm Toång löu löôïng cuûa bôm leân lôùn nhaát, neáu khoâng thì nôùi loûng
ñaàu ñaåy cuûa bôm ñeán khi coù dung dòch chaûy ra
• Air trapped inside the pump: Raise pump flow rate to maximum value, otherwise unscrew discharge valve housing
(pos.14) till the liquid arrives.
•Chieàu saâu huùt quaù lôùn Giaûm
•Reduce it. Suction lift too high:
•AÙp suaát bay hôi cuûa dung dòch quaù cao Taêng aùp suaát thuyû tónh ôû ñaàu huùt cuûa bôm.
• The vapour pressure of the fluid is too high: Increase the hydrostatic head on suction side.
•Ñoä nhôùt dung dòch quaù cao Laép ñaët ñöôøng oáng huùt coù ñöôøng kính lôùn hôn. Taêng aùp
suaát thuyû tónh ôû ñaàu huùt cuûa bôm
• The viscosity of the liquid is too high: Install a suction piping having a larger diameter.Increase the hydrostatic head on
suction side.
•Ñöôøng oáng huùt bò taéc hoaëc van ñoùng Kieåm tra laïi
•Suction piping is clogged or its valves are shut: Verify.
•Boä loïc ôû ñaàu huùt bò taéc Veä sinh.
•Filter on suction side is clogged: Clean it.
•Van bôm bò taéc do caùc chaát baån ñi vaøo töø ñaàu huùt Thaùo van vaø veä sinh moät caùch caån thaän.
•Pump valves are stuck because of foreign matters
coming from suction side: Dismantle the valves and clean them carefully.
NGUYEÂN NHAÂN / CAUSES CAÙCH KHAÉC PHUÏC / SOLUTIONS
Löu löôïng baát thöôøng hoaëc cao hôn so vôùi yeâu caàu Flow rate irregular or higher than expected
•AÙp löïc thuyû tónh ñaàu huùt cao hôn aùp löïc ñaàu ñaåy: Taêng aùp löïc ñaàu ñaåy baèng caùch laép van taïo aùp löïc ngöôïc
•The suction hydrostatic head exceeds the discharge pressure: Increase the discharge pressure by means of a back pressure valve. (OBL, series 300).
•Van taïo aùp ngöôïc bò taéc ôû vò trí môû hoaëc aùp löïc ñaët quaù
thaáp so vôùi aùp löïc ñaàu huùt Kieåm tra.
•Back pressure valve stuck in open position because of foreign matters,
or pressure setting too low respect to the suction head:Check.
•Van cuûa bôm bò keït ôû vò trí môû:
•Pump valves jammed in open position:
3
14
KHÔÛI ÑOÄNG
STARTUP
NGUYEÂN NHAÂN / CAÙCH KHAÉC PHUÏC / SOLUTIONS
Kieåm tra.
Check.
CAUSES

lCheck the oil level
periodically as shown
in fig. 16 .
l Change the oil every
10.000 operating hours.
l In case of lower or irregular flow rate, check the valve units
as follows:
l Refer first to the
pumphead sectiondrawing.
lPay attention to the
arrangement of the
valve components;
each valve ball rests
by gravity on its seat
(Fig. 17).
l Unscrew the suction
and discharge valve
units, one at a time.
Check their compon-
ents for soundness
and cleanlines. Clean
carefully all valve
components: seat,
ball, guide, housing.
Routine maintenance
H. 17 PROPER ARRANGEMENT OF:
-Valves pos. 15
-Seal pos. 5
Baûo döôõng ñònh kyø
H. 16
15
5
15
5
15
5
15
5
l
l
Kieåm tra möùc daàu
ñònh kyø/ xem hình
H. 16.
Cöù sau10.000
giôø laøm vieäc thì
thay daàu.
LOÃ TRA DAÀU
Oil FIlliNG UP
CÖÛA SOÅ DAÀU
OIL WINDOW
LOÃ THAÙO DAÀU
OIL DRAINING
lTrong tröôøng hôïp löu löôïng thaáp vaø baát thöôøng, kieåm tra
caùc boä phaän sau :
l
l
l
Tröôùc tieân tham
khaûo hình veõ ñaàu
bôm.
Chuù yù ñeán trình
töï xaép xeáp caùc boä
phaän cuûa van;
moãi moät bi van seõ
naèm ôû vò trí nghæ
(H. 17).
Laàn löôït nôùi oác ôû
caùc ñaàu huùt vaø
ñaàu ñaåy baèng moät
tuoác nô vít. Kieåm
tra caùc boä phaän coù
saïch vaø ôû traïng
thaùi toát khoâng. Lau
chuøi saïch seõ caån
thaän taát caû caùc boä
phaän nhö bi van, oå
ñôõ van, truïc daãn
höôùng vaø thaân van.
Ñaàu SS316, ñöôïc kyù hieäu "A" , noái bích
A/S/316L heod, "A" execution, flanged connections.
Ñauà SS316, ñöôcï kyù hieuä "A" , noiá ren.
A/S/ 316L head, "A" execution, threaded connections.
SAÉP XEÁP ÑUÙNG
- Van vò trí. 15
- Gioaêng vò trí 5
Ñaàu PP, ñöôïc kyù hieäu "PP" , noái ren. PP Head Ñaàu PP, ñöôïc kyù hieäu "PP", noái bích
, "PP" execution , threaded connections. PP head, "PP" execution, ffonged connections.
AVVIAMENTO
4
15
BAÛO DÖÔÕNG
MAINTEN\ANCE

We suggest the purchase of a
series of essential details for
the preventive maintenance of
the diaphragm pump head
(table G).
* Single valve balls
(STD version)
For the positions see pump head
sectional drawing.
Valves(pos.15).
To dismantle the valves it is necessary to unscrew, first the valve
housing (pos.14) and take off the valve balls.
Assuming that cleaning of the valves is required, proceed as fol-
lows on the valve units one at a time:
A)
Unscrew valve housing (pos.14).
Take note of the arrangement
of the various components of
the valve unit.
Extract the valves.
Clean carefully their seat.
If necessary, replace seats and
valves.
Reassemble valve unit exactly
as before noted.
Screw back valve housing
(Pos. 14)
B)
Diaphragm(pos. 32)
Take off pump head screws
(pos. 29).
Remove pump head (pos.21).
Unscrew the diaphragm
(pos.32) by turning it
counterclockwise.
Before screwing up the
diaphragm, grease its thread
(pos.102) (threaded top end
of the slide).
Screw up the diaphragm and
make sure that it reaches its
end position.
Re-assemble the pump head
(pos. 21), checking valves
groupes arrangement.
Gradually screw back in pos. 29
(screws). Do not overtighten
.
Van (vò trí 15).
A)
Baûo döôõng khaéc phuïc Preventive maintenance
MAØNG 321321
DIAPHRAGM
OÅ ÑÔÕ VAN 52 5 2
VALVE SEATS
TRUÏC DAÃN HÖÔÙNG
62 6 2
VALVE GUIDES
VAN
15 2 15 2
VALVE
GIOAÊNG VAN 82 8 2
VALVE SEAL 92 9 2
ESECUZIONE (MATERIALE DELLA TESTATA) / EXECUTION (HEAD BODY MATERIAL)
PP A AISI 316L
DENOMINATION POSIZIONE N° PEZZI/PIECES NO. POSIZIONE N° PEZZI/PIECES NO.
SINGOLA VALVOLADOPPIA VALVOLA POSITION
VS*
POSITION
VS*
Baûng G Table G
Thaùo voû van Dismantling (and reassembly)
H. 18
32
29
15
14
21
102
Chuùng toâi khuyeân neân
mua moät soá chi tieát chính
ñeå baûo döôõng phoøng
ngöøa ñaàu bôm maøng
(theo baûng G)
*Van ñôn (Tieâu chuaån)
Ñoái vôùi vò trí thì xem
trong baûn veõ ñaàu bôm
Ñeå thaùo voû van baèng tuavít (vò trí 14) vaø thaùo bi van.
Neáu caàn phaûi lau chuøi laàn löôït van theo quy trình sau:
Thaùo van
Ghi nhôù laïi thöù töï saép xeáp
cuûa caùc chi tieát trong van.
Ruùt van ra.
Veä sinh saïch seõ oå ñôõ.
Neáu caàn thieát thì thay oå ñôõ vaø
van.
Laép raùp laïi van theo thöù töï
chính xaùc.
Vít laïi voû van.
B)
Maøng (vò trí 32)
Thaùo Ñinh vít khoûi ñaàu bôm
(vò trí 29)
Thaùo ñaàu bôm (vò trí 21)
Thaùo maøng bôm (vò trí 32)
baèng caùch quay noù theo
chieàu kim ñoàng hoà.
Tröôùc khi vaën maøng chaët laïi
thì caàn phaûi boâi trôn caùc
ñöôøng ren (vò trí 102) (ñöôøng
raõnh ren ôû ñænh cuoái cuûa khe
tröôït).
Xieát chaët laïi maøng bôm vaø
ñaûm baûo raèng noù ñi vaøo ñeán
vò trí cuoái cuøng.
Raùp laïi ñaàu bôm (vò trí 21),
Kieåm tra söï xaép xeáp cuûa caùc
boä phaän cuûa van xem coù
ñuùng vò trí khoâng.
Daàn daàn vít laïi caùc ñinh vít (vò
trí 29), chuù yù khoâng xieát quaù
chaët.
4
13
BAÛO DÖÔÕNG
MAINTEN\ANCE
16

Moät soá söï coá xaûy ra khi vaän haønh Operating troubles
Löu löôïng thaáp hôn theo yeâu caàu Flow rate lower than expected
Kieåm tra.
Thuøng chöùa kín khít hoaëc khoâng coù loã thoâng hôi
Laøm loã thoâng khí treân ñænh cuûa thuøng chöùa
Feed tank hermetically sealed and with no vent:
Ñöôøng oáng huùt bò taéc hoaëc van ñoùng Kieåm tra.
Suction piping clogged or valves shut
Boä loïc ñaàu huùt taéc Veä sinh
Filter on suction side clogged:
Van cuûa bôm keït vì chaát baån Thaùo van an toaøn caån thaän.
Pump valves jammed because of dirt:
Van an toaøn caøi ñaët aùp suaát quaù thaáp Kieåm tra.
Safety valve setting pressure too low:
NGUYEÂN NHAÂN/ CAUSES CAÙCH KHAÉC PHUÏC / SOLUTIONS
Löu löôïng khoâng ñuùng hoaëc cao hôn yeâu caàu
Flow rate irregular or higher than expected
AÙp suaát ñaàu huùt cao hôn aùp suaát ñaàu ñaåy: Taêng aùp suaát ñaàu ñaåy thaáp hôn so vôùi ñaàu huùt 0,3÷0,5 Kg/cm2
Suction pressure higher than discharge pressure: Increase the discharge head of at least 0,3÷0,5 Kg/cmq (3÷5m)
respect to the
suction pressure.
Van taïo aùp löïc ngöôïc bò keït taïi vò trí môû vì baån hoaëc aùp
löïc caøi ñaët quaù thaáp
Back pressure valve stuck in open position because of dirt
or setting pressure too low: Check.
Van cuûa bôm bò keït ôû vò trí môû
Check.
Pump valves jammed in open position:
Thaân bôm vaø ñoäng cô quaù noùng Overheating of pump body and motor
Laép ñieän sai
Incorrect wiring: Check.
Bôm laøm vieäc ôû aùp löïc cao hôn aùp löïc cho pheùp Kieåm tra aùp löïc lôùn nhaát taïi ñaàu ñaåy baèng ñoàng hoà ño aùp löïc
Overheating due to pump working pressure higher than allowed: Check max. discharge pressure by means of a pressure gauge fitted on the discharge pipeline.
AÙp suaát cao hôn quy ñònh
Pressures higher than allowed:
or install a dampener in case of excessive narrowing on the discharge pipeline.
Maët bích bôm bò neùn quaù chaët Nôùi loûng oáng noái vôùi ñaàu bôm vaø kieåm tra
Loosen the pipes connected to the pumphead and check.
Stresses on pump flanges:
Ñöôøng oáng ñaåy taéc hoaëc van bò ñoùng
Discharge pipeline clogged or valve shut: Check.
Van taïo aùp löïc ngöôïc caøi ñaët aùp suaát cao hôn yeâu caàu cho pheùp
Back pressure valve set to a pressure higher than allowed: Check.
Möùc daàu trong hoäp soá thaáp Cho theâm daàu vaøo (xem baûng F trg 9)
Oil level in the gearbox is low: Add suitable oil. See table F, page 9.
Khoâng khí ñi vaøo oáng huùt qua khôùp noái:
Air enters the suction piping through the fittings:
Khoâng khí bò giöõ laïi trong bôm:
Air trapped inside the pump.
Chieàu saâu huùt quaù lôùn
Excessive suction head lift:
AÙp suaát bay hôi cuûa dung dòch quaù cao
Vapour pressure of the liquid too high:
Nhieät ñoä bôm cao:
Pumping temperatures too high.
Ñoä nhôùt dung dòch cao
Viscosity of the liquid too high.
Cho bôm chaïy vôùi löu löôïng toái ña trong thôøi gian ngaén.
For a short while, keep flow rate to maximum.
Giaûm xuoáng
Reduce it.
Taêng aùp suaát thuyû tónh ôû ñaàu huùt cuûa bôm
Increase hydrostatic head on suction side
Taêng aùp suaát thuyû tónh ôû ñaàu huùt cuûa bôm
Increase hydrostatic head on suction side
Laép ñaët ñöôøng oáng huùt coù ñöôøng kính lôùn. Taêng aùp suaát thuyû
tính ñaàu huùt.
Install a suction piping of larger diameter. Increase hydrostatic head on
suction side.
Make a vent in the tank upper part.
Check.
Clean it.
Dismantle the valves and clean them carefully.
Check.
Check.
(see max. pressure indicated on pump rating plate) reduce the discharge pressure
AVVIAMENTO
4
17
BAÛO DÖÔÕNG
MAINTEN\ANCE
NGUYEÂN NHAÂN/ CAUSES CAÙCH KHAÉC PHUÏC / SOLUTIONS
Kieåm tra.
Kieåm tra.
NGUYEÂN NHAÂN/ CAUSES CAÙCH KHAÉC PHUÏC / SOLUTIONS
Kieåm tra.
Kieåm tra.
Kieåm tra.
(Xem aùp suaát lôùn nhaát ghi treân thaân bôm) giaûm aùp suaát ñaàu
ñaåy hoaëc laép thieát bò tieâu xung ôû ñaàu oáng ñaåy