Grundfos NKE Variable-Speed Horizontal End-Suction Pump (Back-Pull-Out Design)
1. Variable-Speed Control and High Energy Efficiency
Integrated Variable-Speed Technology: The NKE series features MGE permanent-magnet motors (IE5 efficiency class) with built-in frequency converters. This allows for continuous speed adjustment to match demand, resulting in significant energy savings compared to fixed-speed pumps.
E-Pump Solution: Variable-speed control adapts to application requirements such as constant pressure, proportional pressure, temperature, or flow, optimizing overall system efficiency.
2. Flexible Application Adaptability
Versatile Use: Suitable for water supply, industrial boosting, HVAC, irrigation, and more. Supports a liquid temperature range of -25°C to +140°C (extendable to -40°C to +220°C with special configurations).
Sensor Integration: The NKE 2000 series offers optional built-in differential pressure sensors, enabling closed-loop control (e.g., constant pressure or temperature regulation).
3. Structural Design and Reliability
Back-Pull-Out Design: Features a back-pull-out structure that allows for motor and impeller maintenance without disconnecting the piping; a single technician can perform the service.
Material Durability: Pump casings are available in cast iron (EN-GJL-250) or ductile iron (EN-GJS-500-7); impellers are made of stainless steel (1.4308/1.4408) or duplex steel (1.4517); shaft seals utilize materials such as silicon carbide/EPDM to suit various pumped media.
4. Intelligent Control and Communication
User Interface: Equipped with an advanced control panel or the Grundfos GO mobile app, supporting wireless commissioning, parameter setting, and real-time monitoring.
Communication Protocols: Supports LON, PROFIBUS, Modbus, BACnet, and others, allowing for integration into building management systems.
5. Performance Range and Customization
Wide Operating Range: Flow rates up to 2,000 m³/h, heads up to 300 m, and power ratings from 0.55 to 250 kW (medium-speed motors at 4,000 RPM; low-speed motors at 2,000/2,200 RPM).
Customization Options: Available options include heavy-duty bearings, specialized shaft seals (e.g., double mechanical seals), and extended couplings to meet requirements for high-pressure or corrosive fluids.
6. Environmental Protection and Compliance
Low-Noise Design: Sound pressure levels comply with ISO 3743 standards; maximum 72 dB(A) for 2-pole motors.
Energy Efficiency Certification: Complies with EU MEI ≥ 0.4 standards (MEI ≥ 0.7 for select models) and meets EuP Directive and ISO 5199 mechanical standards.
7. Ease of Installation and Maintenance
Modular Baseplate: Supports grouted installation; vibration-dampening designs available; flanges comply with EN 1092-2/ASME standards.
Maintenance-Friendly: Long service life for mechanical seals; bearings are lubricated for life (re-lubrication options available for select models).




