4 Technical data
3.2 Rating plate
3.2 Rating plate
KRAL GmbH, 6890 Lustenau, Austria
www.kral.at
KRAL GmbH, 6890 Lustenau, Austria
www.kral.at
p
S
max. /
p
D
max.
Typ
| Type
SN
| Serial no.
T
min. /
T
max.
ºC
l/min
mm²/s
kg
min
-
¹
bar
bar
∆p
Jahr
| Year
Gewicht
| Weight
n
Q
Art.-Nr.
| Item no.
1
2
3
5
4
10
7
9
8
6
11
Fig. 2: Rating plate
1
Construction year
2
Max. operating overpressure
suction-side / Max. operating
overpressure pressure-side
3
Temperature range
4
Serial number
5
Type
6
Article number
7
Differential pressure
8
Nominal delivery rate
9
Rated speed
10
Nominal viscosity
11
Weight
4 Technical data
4.1 Operating limits
In addition to the operating limits of the pump station, the operating limits of the attached pumps must
also be observed.
Parameter
Unit
DKC
DLC
Max. operating pressure
[bar]
16
40
Max. inlet pressure
[bar]
6
6
Max. temperature of pumped liquid
[°C]
180
180
Viscosity min. – max.
[mm
2
/s]
2–10 000
2–10 000
Ambient temperature min. – max.
[°C]
-10 ... 50
-10 ... 50
Tab. 3: Pump station operating limits
4.2 Filling volume
Parameter
Unit
Small pump station
Large pump station
Filling volume of station block
[l]
8
13
Tab. 4: Filling volume of station block
4.3 Required NPSH values
The required NPSH values of the pump depend on the size, the viscosity of the pumped liquid and the
speed.
The NPSH values are available on the website of the manufacturer:
4.4 Internal pressure loss of the pump station
When determining the NPSH value of the pump station also take into account the internal pressure
losses in the ducts of the station, in the reversing valve and particular in the strainer. The following dia-
gram shows as an example the overall pressure loss from the connection of the station up to the suc-
tion flange of the pump under operation with a cleaner strainer.
Operating instructions
OID 02en-GB Edition 2019-11
9
