Grundfos SL1.100.150.40.EX.4.50D.C.Z 93161977 4kW 415v Submersible Waste Pump Dn150 #4849

Grundfos SL1.100.150.40.EX.4.50D.C.Z (93161977) – 4kW 415V Submersible Wastewater Pump (DN150) #4849

This listing is for a Grundfos SL1 sewage / wastewater pump with an S tube® impeller, a DN150 flanged outlet, and an EX (explosion-proof) motor variant. The SL1 range is used for wastewater duties where efficient solids handling, serviceability and reliable operation are important.

This unit is supplied as new, unused surplus stock and has not been installed. Minor cosmetic marks may be present from storage.

• Model: SL1.100.150.40.EX.4.50D.C.Z
• Grundfos product number: 93161977
• Motor output (P2): 4.0 kW
• Electrical supply: 3 × 380–415 V, 50 Hz, DOL
• Motor: 4-pole
• Impeller: S tube®
• Outlet connection: DN150 flanged discharge
• Free spherical passage: 100 mm
• Maximum solids size: 100 mm
• Enclosure class: IP68
• Insulation class: H
• Supplied with 2 year guarantee

Need help confirming suitability?
Call us on 01803 220416 for technical advice.

Manufacturer Specification

Full technical details can be found on the official Grundfos product page:
View Grundfos product page for 93161977

Connection & Installation Notes

• DN150 flanged outlet: this pump has a DN150 discharge flange, allowing connection to compatible DN150 pipework, fittings or installation accessories, subject to matching flange standard and site arrangement.
• The DIN flanged outlet gives flexibility when replacing pumps from other manufacturers, as a suitable DN150 guide claw or adaptor may be used to connect the pump to compatible existing guide-rail systems. Please confirm flange drilling, guide-rail arrangement and base elbow dimensions before purchase.
• The SL1 / SLV range is suitable for submerged installation on auto-coupling systems or submerged free-standing installation, depending on the site arrangement and accessories used.
• Ordered accessories are normally supplied separately and are not factory-fitted unless specifically stated.

Key Specifications

• Model: SL1.100.150.40.EX.4.50D.C.Z
• Product number: 93161977
• Rated power (P2): 4.0 kW
• Rated input power (P1): 4.8 kW
• Voltage code: 50D (5 = 50 Hz, 0D = 3 × 380–415 V DOL)
• Electrical supply: 3 × 380–415 V, DOL
• Rated speed: 1465 rpm
• Rated current: 10.7–10.1 A
• Starting current: 65 A
• Impeller type: S tube®
• Maximum solids size: 100 mm
• Pump housing pressure: PN10
• Maximum starts per hour: 20
• Maximum liquid temperature: 40 °C
• pH range: 4–14

Operating Limits

• Operating mode: intermittent duty (S3); continuous duty (S1) is possible when completely submerged
• Intermittent duty guidance: up to 20 starts per hour; run max 4 minutes; stop min 6 minutes when submerged to the bottom of the cable plug
• Liquid temperature: 0–40 °C
• Short-duration temperature note: up to 60 °C for max 3 minutes applies to non-EX versions only
• pH range: 4–14
• EX operating condition: explosion-proof pumps must be fully submerged during operation

Applications & Selection Guidance

Grundfos provides a selection table intended as guidance when choosing between SL1 (S tube®) and SLV (SuperVortex). Selection should be based on the pumped liquid, dry solids content, fibre loading, operating hours and site conditions.

• Dry solids content: up to 3% – SL1 or SLV may be suitable; above this, up to 5%, guidance points to SLV
• Fibre / solids content: relatively low fibre and solids content – SL1 or SLV; relatively high fibre and solids content – SLV is typically preferred
• Wastewater with long fibres, e.g. laundries: both SL1 and SLV are shown as suitable in the guidance table

Typical duties shown as suitable for SL1 include:

• Stormwater and groundwater
• Drainage and surface water
• Drainage and surface water with small impurities
• Abrasive surface water
• Wastewater with long fibres, e.g. laundries
• Domestic wastewater including discharge from toilets
• Municipal sewage
• Sewage from commercial buildings
• Industrial process water with solids
• Industrial process water without solids and fibres

Construction & Protection Features

• S tube® impeller: channel-style wastewater hydraulic designed to combine efficiency with free passage
• Double mechanical cartridge shaft seal: service-oriented cartridge design
• Thermal protection: thermal switches in the stator windings to protect against overheating
• Leakage monitoring: moisture switch in the motor chamber for detection of water ingress
• Moisture-proof cable plug: stainless steel cable plug connection with sealing protection
• Clamp construction: stainless steel clamp connection between motor housing and pump housing for easier service access

Frequently Asked Questions

What does SL1.100.150.40.EX.4.50D.C.Z mean?

• SL – Grundfos sewage / wastewater pump range
• 1 – S tube® impeller
• 100 – 100 mm free spherical passage
• 150 – DN150 pump outlet
• 40 – 4.0 kW motor output
• EX – explosion-proof pump version
• 4 – 4-pole motor
• 5 – 50 Hz
• 0D – 3 × 380–415 V, DOL starting
• C – 4th generation
• Z – custom-built pump

What is the maximum solids size?

This pump has a 100 mm free spherical passage, which corresponds to the stated maximum solids size for this model.

What discharge connection does this pump have?

This model has a DN150 flanged outlet. This gives flexibility for connecting compatible DN150 pipework, fittings or installation accessories, subject to matching flange standard and site arrangement.

Can this replace another manufacturer’s pump?

In many cases, a DIN flanged wastewater pump can be adapted to suit existing installations using the relevant DN150 guide claw, base elbow or pipework adaptor. Compatibility depends on the existing guide-rail system, flange drilling, discharge centreline and installation dimensions, so please send photos or measurements before purchase if you are unsure.

Why choose S tube® (SL1) instead of a vortex pump?

The SL1 S tube® hydraulic is typically selected where a balance of energy efficiency and solids handling is required. An S-tube / channel-style hydraulic guides the flow through a defined passage, which can provide higher hydraulic efficiency compared with a vortex design, where a larger proportion of energy is used to create a free-flow vortex in the casing.

In general, SL1 is often chosen for regular wastewater duties where efficiency and stable performance are important. SLV / vortex is often selected where maximum clog tolerance is the priority, particularly with elevated fibre or solids loading.

Can this pump handle wastewater with long fibres?

Yes. The Grundfos selection table shows wastewater with long fibres, such as laundry wastewater, as a suitable application for both SL1 and SLV. Final selection should still be based on the full duty point and site conditions.

Does this pump include motor protection and leakage monitoring?

Yes. The standard package includes thermal protection in the stator windings and a moisture switch in the motor chamber. These should be connected to suitable monitoring and control equipment in accordance with the installation requirements.

Does EX mean this pump needs special installation?

Yes. This is an explosion-proof version and must be installed, controlled and protected according to the relevant Grundfos instructions and site hazardous-area requirements. The manufacturer operating note states that explosion-proof pumps must be fully submerged during operation.

Do accessories come fitted?

Ordered accessories are normally supplied separately and are not factory-fitted unless specifically stated.

Do you offer technical support?

Yes — we can help confirm compatibility with pipework, discharge fittings, installation arrangement and control gear. Call 01803 220416 for advice before purchase.

Delivery & Shipping

• Next working day dispatch available where possible
• Same-day courier available – please call for a quote
• UK and international delivery available
• International shipping costs confirmed after checkout

About Our Stock

We specialise in supplying new and unused surplus pumps, allowing us to offer premium equipment at highly competitive prices. All units are inspected prior to dispatch and supplied with guarantee.