Grundfos SE & SL Submersible Wastewater Pumps
The Grundfos SE and SL ranges deliver unmatched reliability and the highest total wire-to-water efficiency available in wastewater pumping. Featuring the innovative S-TUBE® impeller technology, these pumps combine state-of-the-art hydraulics with IE3 high-efficiency motors to provide lower costs of ownership for water utility, industrial, and commercial applications.
As an authorized Grundfos Water Pump Dealer in Dubai, we supply the complete SE and SL ranges with genuine warranty and technical support across the UAE.
Technical Specifications
| Parameter | Specification |
|---|---|
| Power Range | 0.9 kW – 30 kW |
| Motor Poles | 2-pole, 4-pole, 6-pole |
| Frequency | 50 Hz |
| Maximum Head | Up to 70 metres |
| Maximum Flow | Up to 600 m³/h (300 l/s) |
| Free Passage (S-TUBE®) | Up to 125 mm spherical |
| Free Passage (SuperVortex) | Up to 100 mm spherical |
| Motor Efficiency | IE3 components |
| Performance Testing | ISO 9906:2012 Grade 3B (Grade 1U on request) |
| Material Standards | EN 1.4408, EN 1.4517/1.4539 (stainless steel variants) |
Performance Range
| Power Range | Flow Range | Head Range |
|---|---|---|
| SE/SL 0.9 – 11 kW | 5 – 100 l/s (20 – 400 m³/h) | 5 – 30 m |
| SE/SL 9 – 30 kW | 15 – 300 l/s (60 – 600 m³/h) | 10 – 70 m |
S-TUBE® vs Semi-Open Impeller Comparison
| Parameter | S-TUBE® Impeller | Semi-Open Impeller |
|---|---|---|
| BEP Hydraulic Efficiency | 83.3% | 78.9% |
| BEP Overall Efficiency | 74.5% | 68.6% |
| Curve Above 75% Hydraulic Efficiency | ~55% | ~22% |
| Free Passage | 110 mm | 50 mm |
SE vs SL Range Comparison
| Feature | SE Range | SL Range |
|---|---|---|
| Submerged Installation | Yes | Yes |
| Dry Installation (Vertical) | Yes | No |
| Dry Installation (Horizontal) | Yes | No |
| Liquidless Motor Cooling | Up to 11 kW | No |
| Stainless Steel Variants | Full range available | Impeller only |
Impeller Options
S-TUBE® Impeller
The Grundfos S-TUBE® features a tube-shaped impeller with matched pump housing through the entire pump, delivering the highest efficiency over a wider performance range with the largest free passage available.
Best For:
- Continuous operation
- Dry matter content up to 3%
- Spherical free passage up to 125 mm
Key Advantages:
- Vaneless closed channel-impeller design without leading edges prevents clogging
- Wet-balanced construction dramatically lowers vibration levels
- Two-channel design for larger capacities further reduces vibration
- Threaded sealing system (patent pending) provides effective and robust sealing
SuperVortex Impeller
Best For:
- Intermittent operation
- Dry matter content over 3%
- Spherical free passage up to 100 mm
Key Features & Smart Design
SmartRing – Replaceable Wear Ring For higher operational reliability and durability, SmartRing fits between the impeller and volute. Works seamlessly with SmartTrim to ensure optimal wear resistance and extend pump lifetime while maintaining high hydraulic efficiency.
SmartTrim Patented easy adjustment of factory-set impeller clearance helps maintain maximum pump efficiency and increased reliability. No special tools required for dismantling the pump.
Double Mechanical Shaft Seal Primary and secondary seal in one cartridge unit provides longer seal lifetime and easy fail-proof replacement—even in the field. No special tools required.
Short Rotor Shaft Compact motor construction reduces vibrations to protect shaft seals and bearings, ensuring longer operational lifetime with less maintenance.
Easy-to-Remove Cable Entry Innovative and patented stainless steel cable entry ensures liquid cannot penetrate through the cable inlet into the motor. Easy to dismantle for service.
One Cable to the Pump Single cable connects sensors and power supply, removing an important at-risk area and simplifying installation, commissioning, and maintenance.
Easy-to-Open Clamp (up to 11 kW) Stainless steel clamp assembly requires no tools for quick and easy disassembly of pump from motor unit, offering easy access for maintenance.
Liquidless Motor Cooling (SE up to 11 kW) Solid-block stator housing with built-in cooling conduits efficiently transfers excess heat to pumped liquid via solid cast iron flange, enabling continuous operation even in dry installations.
Patented SmartSeal Auto-coupling gasket provides completely leak-proof connection between pump and base unit of the auto-coupling system.
Lifting Handle Designed for optimum point-of-balance, ensures correct lifting and protects auto-coupling sealing.
Smooth, Easy-to-Clean Surface Extremely robust impact-resistant surface is smooth and easily cleaned.
Installation Options
Auto-Coupling Guide-Rail System Submerged installation with easy pump removal for service without entering the wet well.
Fixed Pipe Connection Permanent installation for dedicated pumping stations.
Freestanding Installation Transportable utility pump configuration for temporary or portable applications.
Dry Installation (SE Range Only)
- Vertical dry-installed
- Horizontal dry-installed
Applications
The SE and SL ranges handle diverse wastewater applications:
Water Utility
- Network pumping stations
- Wastewater treatment plants
- Municipal sewage transfer
Industrial
- Process water handling
- Industrial wastewater
- Manufacturing facility drainage
Commercial
- Building services wastewater
- Commercial facility sewage
- Shopping centre drainage
Liquid Types:
- Drainage and surface water
- Domestic wastewater
- Municipal wastewater
- Industrial wastewater
- Process water
Best Total Wire-to-Water Efficiency
When Grundfos says total efficiency, it means complete wire-to-water efficiency accounting for electrical, mechanical, and hydraulic losses. All SE/SL wastewater pumps are built with:
- High-efficiency motors using IE3 components
- Innovative S-TUBE® impeller technology
- Intelligent controls compatibility
- SmartRing replaceable wear ring
The result is wastewater pumping solutions with the best performance and highest reliability currently available.
Perfect for Refurbishment Projects
SE and SL pumps leave a small footprint on existing installations. Replace your current wastewater pumps with new SE and SL pumps without necessarily changing your system or sump. This means high total efficiency benefits are immediately available with minimal investment.
Material Variants
SE Pumps:
- Standard cast iron construction
- Stainless steel impeller variants
- Full stainless steel variants for aggressive environments (EN 1.4408, EN 1.4517/1.4539)
SL Pumps:
- Standard cast iron construction
- Stainless steel impeller option
Intelligent Pumping Solutions
SE/SL wastewater pumps integrate with Grundfos iSOLUTIONS:
- Integrated intelligent controller in AUTOADAPT pumps
- Dedicated wastewater controller for larger pumps
- Compatible with motor protection systems
- Variable frequency drive integration
- Scalable configuration for local networks
Industry-Leading Quality
Grundfos combines decades of experience with advanced development methods:
- Simulation-driven and test-driven development
- Extensive field testing before market release
- Engineered-To-Order capability for specific requirements
- Performance tested to ISO 9906:2012 Grade 3B minimum
- Grade 1U testing available on request
Genuine Grundfos Accessories & Parts
Maintain optimal SE and SL pump performance with original components including S-TUBE® impellers, SuperVortex impellers, SmartRing wear rings, double mechanical shaft seals, SmartSeal gaskets, and auto-coupling accessories. We stock replacement parts for all SE and SL series models.
Select Grundfos Pumps
Browse our complete inventory of Grundfos SE and SL submersible wastewater pumps. As Grundfos Pump Suppliers in Dubai, we provide competitive pricing, technical consultation, and prompt delivery across Dubai, Sharjah, Abu Dhabi, Ajman, and all UAE locations.
Over 70 Years of Wastewater Expertise
Grundfos brings more than seven decades of pump design, testing, and technology expertise to the SE and SL ranges. This experience in adapting and improving durability, efficiency, and operational reliability ensures these pumps stay one step ahead of the constantly changing demands of wastewater applications today.