Technical Specifications

Model Range & Performance Data

Key Features & Benefits

Patented Grinder System The Grundfos-patented grinder mechanism delivers extremely high efficiency with reliable operation. The system efficiently grinds solids into smaller pieces, enabling the use of smaller diameter pressure pipes and reducing overall infrastructure investment. Quick dismantling for wear part replacement requires no special tools.

SmartTrim Impeller Adjustment The patented SmartTrim system enables quick and easy impeller clearance adjustment to maintain peak pump performance throughout the system lifetime. Adjustments can be made without dismantling the pump and require no special tools.

Double Mechanical Shaft Seal The efficient single-unit cartridge shaft seal system ensures longer operation time with minimal downtime. Field replacement is straightforward and requires no specialized equipment.

Stainless Steel Clamp Assembly The unique clamp system allows quick and easy separation of the pump unit from the motor assembly without requiring tools—simplifying maintenance and reducing service time.

Watertight Cable Connection The polyurethane-filled stainless steel cable connection is hermetically sealed, preventing liquid penetration through the cable into the motor housing.

Built-In Motor Protection Thermal switches integrated into the motor windings provide protection against overheating, ensuring extended motor lifetime and reliable operation.

Grinder System Advantages

The Grundfos SEG patented grinder system offers significant operational benefits:

• Easy service access and maintenance
• Reliable, consistent grinding performance
• Efficient reduction of solids to fine particles
• Single screw secures the stationary grinder
• Single additional screw secures the rotary grinder
• Tool-free disassembly for wear part replacement

Applications

The SEG grinder pump range is designed for pressurized sewage transfer systems in locations where gravity sewage infrastructure is unavailable or unsuitable:

Municipal & Community:

• Small towns and rural communities
• Sparsely populated residential areas
• Areas with difficult topography including rocky terrain

Commercial & Industrial:

• Commercial building services
• Industrial wastewater systems
• Facilities requiring effluent transfer

Infrastructure:

• Areas with high groundwater levels
• Farm properties and agricultural facilities
• Locations where gravity systems are cost-prohibitive

Installation Options

The SEG range offers flexible installation configurations:

Auto-Coupling with Guide Rails Submerged installation using auto-coupling systems with guide rails enables easy pump removal for service without entering the wet well. Two different auto-coupling system types are available.

Freestanding Installation Portable configuration for temporary installations or applications where fixed mounting is not required.

Operation Modes SEG pumps support both alternating and continuous operation throughout the water cycle, providing flexibility for varying demand patterns.

Explosion-Proof Variants

The complete SEG range is available in explosion-proof configurations for hazardous environments:

European Classification: CE 0344 II 2 G Ex d IIB T4 Certified according to EN60079-0: 2006 and EN60079-1: 2007

Australia/New Zealand Classification: Ex nC II T3 Certified in accordance with IEC 60079-15:1987 (corresponding to AS 2380.9)

Pressurized Sewage System Benefits

SEG grinder pumps enable pressurized sewage transfer systems that offer significant advantages over gravity alternatives:

Reduced Infrastructure Costs Smaller diameter pressure pipes reduce material and installation expenses compared to large-diameter gravity sewers.

Environmental Protection Sealed pressurized systems minimize groundwater infiltration and sewage exfiltration, protecting the surrounding environment.

Terrain Flexibility Pressurized systems overcome topographical challenges that make gravity systems impractical or impossible.

Lower Energy Consumption The SEG range is engineered to minimize energy consumption while maintaining peak performance throughout the system lifetime.

Serviceability

Grundfos designed the SEG range with field serviceability as a priority:

• No Special Tools Required – All routine maintenance and wear part replacement can be performed with standard tools
• Cartridge Seal Design – Single-unit seal system simplifies replacement
• Tool-Free Clamp System – Quick pump-motor separation for service access
• SmartTrim Adjustment – Maintain performance without pump disassembly
• Easy Grinder Access – Minimal fasteners for rapid wear part replacement

Genuine Grundfos Accessories & Parts

Maintain optimal SEG pump performance with original components including grinder assemblies, mechanical seals, impellers, O-rings, and motor protection devices. We stock replacement parts for all SEG series models.