Grundfos Endsuction long coupled single stage NKG 100-65-250/269 AA2F2AESBAQEUW1

Standard pumps according to ISO 2858

Non-self-priming, single-stage, centrifugal pump designed according to ISO 5199 with dimensions and rated
performance according to ISO 2858. Flanges are PN 16 with dimensions according to EN 1092-2. The pump has an
axial suction port, a radial discharge port and horizontal shaft. It is of the back pull-out design enabling removal of the
motor, coupling, bearing bracket and impeller without disturbing the pump housing or pipework.
The unbalanced rubber bellows seal is according to DIN EN 12756.
The pump is fitted with a foot-mounted, fan-cooled asynchronous motor. Pump and motor are mounted on a common
base frame.
Pump and motor are mounted on a common steel base frame in accordance with ISO 3661.
The back pull-out design together with a spacer coupling makes it possible to service the pump without dismantling
the pump housing and motor from the base frame.
This saves realignment of pump and motor after service.
1) Remove coupling.
2) Remove the bolts in the bearing bracket support foot.
3) Remove the bearing bracket from the pump housing.
Pump
The pump housing has both a priming and a drain hole closed by plugs. The impeller is a closed impeller with
double-curved blades with smooth surfaces. The impeller is statically balanced according to ISO 1940-1 class G6.3
and hydraulically balanced to compensate for axial thrust.
The pump is fitted with an unbalanced rubber bellows seal with torque transmission across the spring and around the
bellows. Due to the bellows, the seal does not wear the shaft, and the axial movement is not prevented by deposits
on the shaft.
Seal faces:
• Rotating seal ring material: carbon graphite, metal-impregnated
• Stationary seat material: silicon carbide (SiC)
Due to the favourable lubricating properties of carbon graphite, the seal is suitable for use even under poor lubricating
conditions, such as hot water.
However, under such conditions, wear on the carbon graphite face can be expected, and seal life will be reduced .
The material pairing is not recommended for liquids containing particles as this will result in wear on the SiC face.
Secondary seal material: EPDM (ethylene-propylene rubber)
EPDM has excellent resistance to hot water. EPDM is not suitable for mineral oils.
The shaft is made of stainless steel and has a diameter of 32 mm where the coupling is mounted.
The pump uses a spacer coupling between the pump and motor shaft.
The language on the pump nameplate is English.
The base frame is prepared for grouting. Grouting improves the contact of the base frame with the foundation and
stiffens the base frame construction. This changes the vibration level.
Grouting is mandatory for all base frame types for all 2-pole pumps equal to and above 55 kW to fulfill the max
vibration level requirements stated in standards. For other pump motor combinations grouting of the base frame is
optional.
Motor

The motor is a totally enclosed, fan-cooled motor with principal dimensions to IEC and DIN standards. Electrical
tolerances comply with IEC 60034.
The motor efficiency is classified as IE3 in accordance with IEC 60034-30-1.
The motor has thermistors (PTC sensors) in the windings in accordance with DIN 44081/DIN 44082. The protection
reacts to both slow- and quick-rising temperatures, e.g. constant overload and stalled conditions.
Thermal switches must be connected to an external control circuit in a way which ensures that the automatic reset
cannot cause accidents. The motors must be connected to a motor-protective circuit breaker according to local
regulations.
A variable speed drive makes adjustment of pump performance to any duty point possible. If the motor is to be
connected to a variable speed drive, the pump must be ordered with an electrically insulated motor bearing.
Further product details
Cast-iron parts have an epoxy-based coating made in a cathodic electro-deposition (CED) process. CED is a
high-quality dip-painting process where an electrical field around the products ensures deposition of paint particles as
a thin, well-controlled layer on the surface.

General information:
Product name: NKG 100-65-250/269
AA2F2AESBAQEUW1
Product No: 98319637
EAN number: 5711492960578
Technical:
Pump speed on which pump data
are based: 2975 rpm
Rated flow: 157.2 m³/h
Pump with motor (Yes/No): Y
Rated head: 89.56 m
Actual impeller diameter: 269 mm
Nominal impeller diameter: 250
Type of impeller: Standard
Shaft diameter: 32 mm
Code for shaft seal: BAQE
Mechanical seal type: Single
Curve tolerance: ISO9906:2012 3B
Pump version: A2
Bearing design: Standard
Materials:
Pump housing: Cast iron
Pump housing: EN-GJL-250
Pump housing: ASTM class 35
Wear ring: Brass
Impeller: Cast iron
Impeller: EN-GJL-200
Impeller: ASTM class 30
Internal pump house coating: CED
Material code: A
Code for rubber: E
Shaft: Stainless steel
Shaft: EN 1.4301
Shaft: AISI 304
Installation:
Maximum ambient temperature: 55 °C
Maximum operating pressure: 16 bar
Pipe connection standard: EN 1092-2
Type of inlet connection: DIN
Type of outlet connection: DIN
Size of inlet connection: DN 100
Size of outlet connection: DN 65
Pressure rating for connection: PN 16
Coupling type: Flexible w/spacer
Base frame design: EN/ISO
Code for base frame: 9
Grouting (Yes/No): Y
Connect code: F
Liquid:
Pumped liquid: Water
Liquid temperature range: 0 .. 120 °C
Selected liquid temperature: 20 °C
Density: 998.2 kg/m³
Electrical data:
Motor type: SIEMENS
Rated power – P2: 55 kW
Mains frequency: 50 Hz
Rated voltage: 3 x 380-420D/660-725Y V
Rated current: 95/55 A
Starting current: 670 %
Cos phi – power factor: 0.89
Rated speed: 2975 rpm
IE efficiency: IE3 94,3%
IE Efficiency class: IE3

Motor efficiency at full load:
Value
94.3 %
Motor efficiency at 3/4 load:
94.5 %
Motor efficiency at 1/2 load:
93.9 %
Number of poles:
2
Enclosure class (IEC 34-5):
IP55
Insulation class (IEC 85):
F
Built-in motor protection:
PTC
Motor No:
98943375
Bearing insulation type N-end:
Steel Bearing
Controls:
Frequency converter:
None
Pressure sensor:
N
Others:
Minimum efficiency index, MEI ≥: 0.51
Net weight:
676 kg
Gross weight:
744 kg
Shipping volume:
1.54 m³
Language on pump nameplate:
GB