Grundfos Endsuction close coupled multistage CM 5-9 A-R-I-E-AQQE C1-A-A-N

CM is a reliable, quiet and compact horizontal end-suction pump. The modular pump design makes it easy to make customised solutions. CM is available in cast iron and stainless steel.

Compact, reliable, horizontal, multistage, end-suction centrifugal pump with axial suction port and radial discharge
port. Pump materials in contact with the liquid are in stainless steel. The mechanical shaft seal is a special designed,
unbalanced O-ring seal. Pipework connection is via internal Whitworth pipe threads, Rp (ISO 7/1).
The pump is fitted with a 1-phase, foot-mounted, fan-cooled asynchronous motor.
Further product details
Pump and motor are integrated in a compact and user-friendly design. The pump is fitted to a low base plate, making
it ideal for installation in systems where compactness is important.
The state-of-the-art design and materials of the shaft seal ensure high wear resistance, improved sticking and
dry-running capabilities and long operating life.
Servicing the pump requires no special service tools. Service parts are in stock for quick delivery and are available as
kits, single parts or bulk. Service videos are available on www.youtube.com.
Pump
A combination of a stop ring and a Nord-lock® washer secures a tight and reliable fixation of the impeller spacing
pipes to the splined pump shaft. It is possible to remove and fit the hydraulic parts from the pump side. The inlet and
outlet port are integrated in the pump sleeve. The inlet part, chambers and discharge part are hold together by four
staybolts and a retaining flange.
The pump is fitted with an unbalanced O-ring seal with a rigid torque-transmission system. It has a fixed seal driver
ensuring a reliable rotation of all parts. The dynamic secondary seal is an O-ring.
Seal faces:
• Rotating seal ring material: silicon carbide (SiC)
• Stationary seat material: silicon carbide (SiC)
This material pairing is used where higher corrosion resistance is required. The high hardness of this material pairing
offers good resistance against abrasive particles.
Secondary seal material: EPDM (ethylene-propylene rubber)
EPDM has excellent resistance to hot water. EPDM is not suitable for mineral oils.

The pump shaft is connected to the motor shaft through a left thread and tight fit. The shaft cannot be dismantled.
Motor
The motor is a totally enclosed, fan-cooled motor with principal dimensions to EN 50347. Electrical tolerances comply
with EN 60034.
The motor efficiency is classified as IE2 in accordance with IEC 60034-30.

Controls:
Frequency converter: None
Liquid:
Pumped liquid: Water
Liquid temperature range: -20 .. 120 °C
Selected liquid temperature: 20 °C
Density: 998.2 kg/m³

Technical:
Pump speed on which pump data are based: 2900 rpm
Rated flow: 4.7 m³/h
Rated head: 70.32 m
Code for shaft seal: AQQE
Approvals: CE,EAC,UKCA
Approvals for drinking water: WRAS,ACS,NSF61,UBA
Curve tolerance: ISO9906:2012 3B
Materials:
Pump housing: Stainless steel
EN 1.4301
AISI 304
Impeller: Stainless steel
EN 1.4301
AISI 304
Installation:
Range of ambient temperature: -20 .. 55 °C
Maximum operating pressure: 16 bar
Max pressure at stated temp: 16 bar / 90 °C
10 bar / 120 °C
Type of connection: Rp
Size of inlet connection: 1 1/4 inch
Size of outlet connection: 1 inch
Outlet position: 12
Electrical data:
Motor standard: IEC
Frame size: 90LE
IE efficiency class: IE2
Rated power – P2: 1.7 kW
Mains frequency: 50 Hz
Suitable for 50/60 Hz: N
Rated voltage: 1 x 220-230 V V
Service factor: 1.00
Rated current: 10.20-9.75 A
Starting current: 470-520 %
Rated speed: 2870-2880 rpm
Enclosure class (IEC 34-5): IP55
Insulation class (IEC 85): F
Built-in motor protection: PTO
Cable included (Yes/No): N
Others:
Terminal box position: 12
Minimum efficiency index, MEI ≥: 0.7
Net weight: 25.9 kg
Gross weight: 28.4 kg