Product overview
CR, CRI, CRN, CRE, CRIE, CRNE
9
Pump
The CR and CRE pump is a non-self-priming, vertical
multistage centrifugal pump. The pumps are available
with a Grundfos standard motor (CR pumps) or a
frequency-controlled motor (CRE pumps).
The pump consists of a base and a pump head. The
chamber stack and the outer sleeve are secured
between the pump head and the base by means of
staybolts. The base has suction and discharge ports on
the same level (in-line).
All pumps are equipped with a maintenance-free
mechanical shaft seal of the cartridge type.
Fig. 3 CR pump
CR pump with ANSI/NSF 61 listing is available. See UL
file MH26400 or contact Grundfos.
Motor
Grundfos standard motors - ML and Baldor® motors
CR, CRI and CRN pumps are fitted with a Grundfos
specified motor. The motors are all heavy-duty 2-pole,
NEMA C-face motors.
Frequency-controlled motors - MLE motors
CRE, CRIE and CRNE pumps are fitted with a totally
enclosed, fan-cooled, 2-pole motor with integrated
variable frequency drive.
From 0.5 Hp to 1.5 Hp Grundfos offers CRE pumps
fitted with single-phase MLE motors (1 x 208-230 V).
From 1.0 Hp to 30 Hp Grundfos offers CRE pumps fitted
with three-phase MLE motors (3 x 460-480 V). From 1.5
Hp to 7.5 Hp Grundfos offers CRE pumps fitted with
three-phase MLE motors (3 x 208-230 V).
Electrical data
Optional motors
The Grundfos standard range of motors covers a wide
variety of application demands. However, for special
applications or operating conditions, custom-built motor
solutions can be provided.
For special applications or operating conditions,
Grundfos offers custom-built motors such as:
• explosion proof motors,
• motors with anti-condensation heating unit,
• low-noise motors,
• premium efficiency motors,
• motors with thermal protection.
Motor protection
Single-phase Grundfos specified motors up to 7.5 hp
have a built-in thermal overload switch.
Three-phase motors must be connected to a motor
starter in accordance with local regulations.
GR5357 - GR3395
Motor
Coupling
Pump head
Outer sleeve
Staybolts
Base plate
Base
Impellers
Shaft seal
(Cartridge type)
Mounting
designation
NEMA
Insulation
class
F & B
Efficiency
class*
Energy efficient
Premium efficiency - on request for 15 Hp and above
Enclosure
class
TEFC - Totally Enclosed Fan Cooled
(Grundfos standard)
ODP - Open Drip Proof - on request
60 Hz
Standard
voltages
1 x 115/208-230 V
3 x 208-230/460 V
3 x 575 V
Approvals
The motors are rated for:
Baldor ML/MLE MLE
* 1 - 10 Hp ML motors are premium efficiency as standard
To Next Page
Loading...
Need help?
General
