Operating and inlet
pressure
CR, CRI, CRN, CRE, CRIE, CRNE
20
Maximum inlet pressure
The following table shows the maximum permissible
inlet pressure. However, the current inlet pressure + the
pressure against a closed valve must always be lower
than the maximum permissible operating pressure.
If the maximum permissible operating pressure is
exceeded, the conical bearing in the motor may be
damaged and the life of the shaft seal reduced.
Example of operating and inlet pressures
The values for operating and inlet pressures shown in
the tables must not be considered individually but must
always be compared, see the following examples:
Example 1:
The following pump type has been selected:
CR 3-10 A-A-A
Max. operating pressure: 232 psi
Max. inlet pressure: 145 psi
Discharge pressure against a closed valve: 139.2 psi,
see page 34.
This pump is not allowed to start at an inlet pressure of
145 psi, but at an inlet pressure of 232.0 – 139.2 =
92.8 psi.
Example 2:
The following pump has been selected:
CR 10-2 A-GJ-A
Max. operating pressure: 232 psi
Max. inlet pressure: 116 psi
Discharge pressure against a closed valve:
42 psi (97 ft), see page 42.
This pump is allowed to start at an inlet pressure of
116 psi, as the discharge pressure is only 42 psi, which
results in an operating pressure of 116 + 42 = 158 psi.
On the contrary, the max. operating pressure of this
pump is limited to 158 psi, as a higher operating
pressure will require an inlet pressure of more than
116 psi.
In case the inlet or operating pressure exceeds the
pressure permitted, see section Lists of variants - on
request on page 83.
CR, CRI, CRN 1s
1s-2 › 1s-27 145 [psi]
CR(E), CRI(E), CRN(E) 1
1-2 › 1-25
1-27
145 [psi]
218 [psi]
CR(E), CRI(E), CRN(E) 3
3-2 › 3-15
3-17 › 3-25
145 [psi]
218 [psi]
CR(E), CRI(E), CRN(E) 5
5-2 › 5-9
5-10 › 5-24
145 [psi]
218 [psi]
CR(E), CRI(E), CRN(E) 10
10-1 › 10-5
10-6 › 10-17
116 [psi]
145 [psi]
CR(E), CRI(E), CRN(E) 15
15-1 › 15-2
15-3 › 15-12
116 [psi]
145 [psi]
CR(E), CRI(E), CRN(E) 20
20-1
20-2 › 20-10
116 [psi]
145 [psi]
CR(E), CRN(E) 32
32-1-1 › 32-2
32-3-2 › 32-6
32-7-2 › 32-11-2
58 [psi]
145 [psi]
218 [psi]
CR(E), CRN(E) 45
45-1-1 › 45-1
45-2-2 › 45-3
45-4-2 › 45-8-1
58 [psi]
145 [psi]
218 [psi]
CR(E), CRN(E) 64
64-1-1
64-1 › 64-2-1
64-2 › 64-5-2
58 [psi]
145 [psi]
218 [psi]
CR(E), CRN(E) 90
90-1-1 › 90-2-2
90-2-1 › 90-4-1
145 [psi]
218 [psi]
CR(E), CRN(E) 120
120-1
120-2-2 › 120-3
120-4-2 › 120-5-1
145 [psi]
218 [psi]
290 [psi]
CR(E), CRN(E) 150
150-1-1
150-1 › 150-2
150-3-2 › 150-4-1
145 [psi]
218 [psi]
290 [psi]
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