GRUNDFOS SE/SL1 Series Submersible Sewage Pumps (Suitable for Municipal and Industrial Applications)

I. Core Product Series

Model Classification

SE1.50: Power ≥ 2.2 kW

SE1.80/SE1.100: Large diameter design, supporting 80mm and 100mm particles respectively

SEV.65: Power ≥ 2.2 kW

SEV.80/SEV.100: SuperVortex impeller design, suitable for liquids containing fibers or viscous liquids

Electrical Parameters

Voltage: Three-phase 380-415V (supports DOL/Y-D start) or 220-240V

Frequency: 50Hz

Speed: Two-pole (3000 min⁻¹) or four-pole (1500 min⁻¹)

II. Explosion-proof Safety Features

Explosion-proof Certification

European Standard:

CE 0344 II 2 GD, EEx dc IIB T4/T3 (supports 200°C with inverter)

IP68 protection rating, fire-resistant housing (unauthorized intervention prohibited)

Australian Standard: Ex nA II T3 (compliant with IEC 79-15)

Maintenance Restrictions

Components permitted for unauthorized repair: pump casing, impeller, sealing rings, wear rings, shaft seal

Components requiring authorized service station operation: stator, rotor, and other core motor components

III. Structural and Performance Characteristics

Impeller Design

Channel impeller (Code 1): Suitable for large particle wastewater (e.g., SE1.80)

Vortex impeller (Code V): Non-clogging design, suitable for fibrous liquids

Materials and Sealing

Oil chamber uses Shell Ondina 917 lubricating oil (0.3-0.7L capacity)

Double shaft seal protection, oil chamber pressure relief design

O-rings use Rocol 22. Lubricant and sealing rings need to be replaced regularly.

Torque and Assembly

Standardize the torque of key screws (e.g., M8 screw 12±2 Nm, M10 screw 50±5 Nm). Nm)

Special tool support (e.g., stator guide, wear ring clamp)

IV. Intelligent and Safety Functions

Thermal Protection

Stator built-in thermal switch (150°C trigger shutdown), explosion-proof models require manual restart

Use with LC-Ex4 safety barrier (potentially explosive environments)

Monitoring and Maintenance

Recommended maintenance every 3000 hours or year

Inspection items: oil water content, cable integrity, impeller wear, bearing noise

V. Application Scenarios

Municipal Sewage: Suitable for drainage systems containing solid particles (≤100mm)

Industrial Wastewater: Treats oily, fibrous, or high-viscosity liquids (e.g., SEV series)

Hazardous Environments: Explosion-proof models can be used in areas with explosive gases such as petroleum and chemical plants

VI. Installation and Operation Points

Electrical Connections

Grounding wire cross-sectional area ≥4 mm² (yellow-green bicolor wire)

Requires matching motor protection circuit breaker (e.g., Grundfos CU100 controller)

Startup Verification

Confirm rotation direction by comparing flow rate or pressure (arrow direction marked on pump top cover)

Incorrect rotation direction will cause performance degradation; two phases of power supply need to be swapped.

VII. Troubleshooting (Partial Examples)