Suction Conditions - Grundfos CRK Series Installation And Operating Instructions Manual

D1
D2
D3
Fig. 8 Vertical installation
Mounting flange dimensions:
Pump type D1 D2
CRK 2, 4 140 160 180 100
MTR 1s, 1,
140 160 180 100
3, 5
MTR 10,
200 225 250 125
15, 20
MTR 32 190 220 250 150
MTR 45,
240 265 290 165
64

6.2 Suction conditions

The bottom of the pump strainer must be at least 25
mm above the bottom of the tank.
The pumps are designed to provide full performance
down to a level of A mm above the bottom of the
strainer.
At a liquid level between A and B mm above the
bottom of the strainer, the built-in priming screw will
protect the pump against dry running.
Note: MTR 32, 45 and 64 pumps have no priming
screw.
Pump type
CRK 2, 4 and MTR 1s, 1, 3, 5
MTR 10, 15, 20
MTR 32, 45, 64
10
4 x X
C
D3 L C X
Rp 1 1/4
∅7.5
G 1 1/4
Rp 1 1/4
∅9.5
G 1 1/4
Rp 2
∅9
G 2
∅12
DN 65
∅12
DN 80
A [mm] B [mm]
41 28
50 25
70 -
Fig. 9 CRK 2, 4 and MTR 1s, 1, 3, 5
Fig. 10 MTR 10, 15, 20
Fig. 11 MTR 32, 45, 64
A
B
25 mm
A
B
25 mm
A
25 mm