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Kieå u daä p xung
Daä p xung kieå u bình
Cheá taï o theo daï n g hình troø n
Theå tích bình: vaø o khoaû n g 35 laà n löu löôï n g bôm.
Öu ñieå m :
Khoâ n g caà n phaû i moà i
Nhöôï c ñieå m :
Noù caà n phaû i ñuôï c naï p khoâ n g khí ñònh kyø baè n g caù c h
thaù o chaá t loû n g thoâ n g qua moä t van xaû ñeå ñöa khoâ n g
khí vaø o bình
Boä daä p xung kieå u boù n g.
Dung dòch ñöôï c ngaê n caù c h vôù i buoà n g xaû bôû i maø n g.
Theå tích bình: 8 laà n so vôù i löu löôï n g bôm.
Öu ñieå m :
Theå tích nhoû .
Khoâ n g caà n naï p khoâ n g khí ñònh kyø vì khoâ n g khí ñöôï c
chöù a trong quaû boø n g.
Nhöôï c ñieå m :
Caà n phaû i bieá t aù p löï c laø m vieä c ñeå tính dung tích boù n g.
Laé p ñaë t ñoà n g hoà ño aù p löï c
Ñeå kieå m tra quaù trình hoaï t ñoä n g bình
thöôø n g cuû a bôm, caà n thieá t phaû i laé p ñaë t
01 ñoà n g hoà ño aù p löï c ôû taï i ñaà u ñaå y cuû a
bôm ñoà n g hoà ño aù p suaá t (Hình 13)
Ñoà n g hoà aù p löï c seõ chæ ra aù p löï c laø m
vieä c thöï c teá cuû a bôm. Giaù trò naø y khoâ n g
ñöôï c vöôï t quaù aù p löï c laø m vieä c lôù n nhaá t
cuû a bôm.
Heä thoá n g laé p ñaë t chuaå n
H. 14
Hình 14 chæ ra
kieåu laép ñaët
chuaå n .
Bladder type damper
Advantages:
Disadvantages:
Installation of the pressure gauge
H. 13
DI SCARICO
MANOMETRO
DRAIN VALVE
PRESSURE GAUGE
VALVOLA
DI SICUREZZA
SAFETY VALVE
Standard plant arrangement
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.
The liquid is separed from the relieving chamber by a diaphragm.
Damper volume: about 8 times the pump swept volume .
Small volume.
No need for periodic inflation because the gas is contained in the bladder.
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
VALVOLA
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.
1- Loï c chöõ " y"
"Y" filter
2 - Bôm ñònh löôï n g
Metering pump
3 - Van xaû aù p
Relief valve
4 - Van xaû
Drain valve
5 - Van ñoù n g ngaé t
On-off valve
6 - Thieá t bò tieâ u xung
Pulsation damper
7 - Ñoà n g hoà ño aù p
Pressure gauge
Damper types
2
Fig.14 shows
the indications
for a correct
installation of
the metering
pumps.
11
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