Grundfos CR User Manual

15
English (US)
8.8 Bypass
Install a bypass in the outlet pipe if there is any risk that the pump
may operate against a closed valve in the outlet line. Flow
through the pump is required to ensure that adequate cooling and
lubrication of the pump is maintained. See 7.3 Minimum inlet
pressures for minimum flow rates.
Elbows should be at least 12" from the bypass opening to prevent
erosion.
Fig. 7 Recommended bypass arrangement
Fig. 8 Optional bypass arrangement
Fig. 9 Optional bypass arrangement for CR, CRN 32, 45 and
64
TM04 3926 3613TM04 3909 3613TM04 3924 0409
Outlet
Inlet
Bypass line
B
y
p
a
s
s
o
p
e
n
i
n
g
Outlet
Bypass line
Bypass
opening
Inlet
Bypass line
Bypass
opening
Inlet
Outlet

Grundfos CR Specifications

General

Impeller Material	Stainless steel
Type	Centrifugal Pump
Temperature Range	+120 °C
Material	Stainless Steel
Applications	Water supply, pressure boosting, cooling systems
Connections	Flanged