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Grundfos – NBG 65-40-200:206Grundfos – NBG 65-40-200:206Grundfos – NBG 65-40-200:206Grundfos – NBG 65-40-200:206Grundfos – NBG 65-40-200:206

Grundfos : NBG 65-40-200/206 AF2BBQQE

Product No.: 96703917

Non-self-priming, single-stage, centrifugal volute pump designed according to ISO 5199 with dimensions and rated performance according to ISO 2858 (16 bar).
Flanges are PN 16 with dimensions according to EN 1092-2. The pump has an axial suction port, radial discharge port, horizontal shaft and a back pull-out design enabling removal of the motor, motor stool, cover and impeller without disturbing the pump housing or pipework.

The unbalanced rubber bellows seal is according to DIN EN 12756.
The pump is close-coupled to a fan-cooled asynchronous motor.
The back pull-out design means that the pump can be serviced by a single person without disturbing the pump
housing or pipes.

Grundfos – NBG 65-40-200:206

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.

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. Wear rings used in pump housing and for impeller are made of bronze/brass. Motor stool and pump cover are made of cast iron (EN-GJL-250). Coupling guards are fitted to the motor stool. The pump cover is provided with a manual air vent screw for venting of the pump housing and the shaft seal chamber.

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.

Primary seal:
• 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 housing has no feet.

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.

The motor can be connected to a variable speed drive for adjustment of pump performance to any duty point.
Grundfos CUE offers a range of variable speed drives. Please find more information in Grundfos Product Center.

Technical data
Controls
Frequency converter NONE
Pressure sensor N
Liquid temperature range -25 .. 120 °C
Selected liquid temperature Water
Liquid temperature range 20 °C
Density 998.2 kg/m³
Technical
Pump speed on which pump data are based 2935 rpm
Rated flow 55.66 m³/h
Rated head 44.86 m
Actual impeller diameter 206 mm
Nominal impeller diameter 200
Shaft seal arrangement Single
Code for shaft seal BQQE
Curve tolerance ISO9906:2012 3B
Curve tolerance ISO9906:2012 3B
Bearing design  Standard
Materials
Pump housing Cast iron
EN-GJL-250
ASTM class 35
Wear ring Brass
Impeller Brass
Shaft Stainless steel
EN 1.4301
EN 1.4301
AISI 304
Internal pump house coating CED
Installation
Maximum ambient temperature 40 °C
Maximum operating pressure 16 bar
Pipe connection standard EN 1092-2
Size of inlet connection DN 65
Size of outlet connection DN 40
Pressure rating for connection PN 16
Bearing lubrication  Grease
Pump housing with feet No
Support block N
Electrical data
Motor type 160M
IE Efficiency class IE3
Rated power – P2 11 kW
Mains frequency 50 Hz
Rated voltage 3 x 380-420D/660Y V
Rated current 20,4-18,4/11,7 A
Starting current 775-775 %
Cos phi – power factor 0.90
Rated speed 2935 rpm
Efficiency IE3 91,2%
Motor efficiency at full load 991.2-91.2 %
Motor efficiency at 3/4 load 92.0-92.0 %
Motor efficiency at 1/2 load 92.0-92.0 %
Number of poles 2
Enclosure class (IEC 34-5) 55 (Protect. water jets/dust)
Insulation class (IEC 85) F
Motor No 99490101
Others
Minimum efficiency index, MEI ≥ 0.65
Net weight 177 kg
Gross weight 202 kg
Shipping volume 0.707 m³
Country of origin SG
Custom tariff no. 84137011

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