Grundfos SPK Series - 7 Installation; Maximum Permissible Operating Pressure and Liquid Temperature for the Shaft Seal; Minimum Flow Rate; Pump Location

5
English (US)
6.4 Maximum permissible operating pressure and
liquid temperature for the shaft seal
Fig. 3 MTR 1s to 64
Fig. 4 MTR 1s to 64 [metric]
Fig. 5 CRK and SPK
Fig. 6 CRK and SPK [metric]
6.5 Minimum flow rate
Due to the risk of overheating, the pump should not be used at
flows below the minimum flow rate.
The curve below shows the minimum flow rate as a percentage of
the nominal flow rate in relation to the liquid temperature.
Fig. 7 Minimum flow rates
Fig. 8 Minimum flow rates [metric]
Note: The pump must never operate against a closed discharge
valve.
7. Installation
7.1 Pump location
The pump is designed for tank mounting in vertical position. The
pump is positioned in a hole cut into the cover of the tank (upper
side) and is secured to the tank by four hexagon head screws
through the holes in the mounting flange. It is recommended to fit
a sealing gasket between the pump flange and tank.
If the pump is to be installed horizontally (MTRI[E] 1s to 20, CRK2
and 4, and SPK only), the drain hole of the motor stool must be
fitted with a plug and four closed nuts with O-rings must be fitted
to the straps.
Fig. 9 Horizontal installation (MTRI[E] only)
Note: MTR 32, 45 and 64 pumps can only be installed in vertical
position.
TM03 4270 2006
TM 07 7854 2512
TM03 4271 2006
TM 03 0022 2512
TM03 5343 3406
0 20 40 60 80 100 120 140 160 180 200 220
T [°F]
0
100
200
300
400
[psi]
p
HUUV
-20 -10 0 10 20 30 40 50 60 70 80 90 100 110
0
5
10
15
20
25
30
35
p
[bar]
HUUE / HUUV
T [°C]
0 20 40 60 80 100 120 140 160 180 200 220
T [°F]
0
100
200
300
400
[psi]
p
AUUV
-40 -20 0 20 40 60 80 100 120 140
160
0
5
10
15
20
25
30
p
[bar]
AUUV
T [°C]
40 60 80
T [°F]
0
10
20
30
Qmin
[%]
140 176 212 248
284
104
TM02 7853 2512
The pump must be installed so that persons
cannot accidentally come into contact with the
hot surface of the motor.
Caution
Tank must be drained to change shaft seal in the
event of leakage in horizontally mounted pumps.
TM02 8043 4503
40 50 60 70 80 90 100 110
T [°C]
0
5
10
15
Qmin
[%]
Drain plug
Closed nut
CRK_MTR.bk.book Page 5 Thursday, October 25, 2012 5:08 PM