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Tab. 9: Metering pumps with self-bleeding dosing head ***
Pump
Maximum pump capacity at maximum back
type
pressure
EXBb
bar
l/h
1601
16
0.66
1201
12
1.0
0803
8
2.4
1002
10
1.8
Pump type
Stroke rate
EXBb
Strokes/min
1601
120
1201
120
0803
120
1002
120
14.2
Precision
psi
gph
Ml /
stroke
232
0.174
0.09
274
0.265
0.14
116
0.634
0.33
145
0.476
0.25
*** The given performance data represents guaranteed minimum
values, calculated using water at room temperature
1 gal= 3.78 l
Connector size
outside dimen‐
sion x inside
diameter
mm
6x4
6x4
6x4
6x4
* Suction lift: with filled suction line
** Priming lift: with an empty suction line
min.: -5 %, max.: not specified
with max. stroke length and max. back pressure for all material ver‐
sions.
better than ± 2 %
under constant conditions and at least 30% stroke length;
Note the following information:
All figures refer to dosing measurements with water at 20 °C.
n
Constant back pressure, if possible above 1 bar.
n
If metering at atmospheric pressure, a back pressure valve
n
must be used to create a back pressure of at least 1.5 bar
(note the installation examples).
Wherever possible, lay suction and metering lines on a contin‐
n
uously rising gradient.
If the liquid level of the storage tank lies above the pump when
n
in operating mode, the priming pressure lies against the suc‐
tion side; in this case, the back pressure should be high
enough to ensure a minimum pressure difference of 1.5 bar;
alternatively, use a back pressure valve or a spring-loaded
injection valve with corresponding priming pressure.
Maximum pump capacity rate at medium back
pressure
bar
l/h
psi
-
-
-
-
-
-
-
-
-
-
-
-
Suction lift*
Priming lift**
m water column m water column bar
-
1.8
-
2.0
-
2.8
-
2.0
Technical data
gph
Ml /
stroke
-
-
-
-
-
-
-
-
Permissible pri‐
ming pressure,
suction side
0.2
0.2
0.2
0.2
49
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