Flygt NS 3127.191 MT 438 4.7kw submersible waste water pump EX DN100 #4743

Flygt NS 3127.191 MT 438 – 4.7kW Submersible Waste Water Pump EX (DN100)

The Flygt NS 3127 is a high-efficiency submersible pump designed for pumping clean water, surface water, and wastewater containing solids or long-fibered material. The Flygt N-impeller technology is engineered to maintain performance over time by reducing clogging and wear, making this model well suited to demanding municipal and industrial applications where continuous reliable operation is required.

Flygt is a premium pump manufacturer and part of the Xylem Group, widely recognised for producing high-quality wastewater and drainage pumps used globally.

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

• High-efficiency Flygt N-impeller design
• Suitable for long-fibered and solids-laden wastewater
• DN100 drilled discharge flange – supplied bare flange
• Portable / semi-permanent wet well installation
• Explosion-proof (Ex) version
• 2 year guarantee included

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

Delivery & Shipping

• Next working day dispatch available (order before 4pm)
• Same-day courier available – please call for a quote
• UK and international delivery available
• International shipping costs confirmed after checkout

Series technical documentation:
This pump forms part of the Flygt 3127 N-technology range. Full technical details for the series, including installation types, MT motor classes, and Adaptive N hydraulics, can be found in the manufacturer documentation:
View official Flygt 3127 specification sheet

Technical note: Voltage shown as 415V is for simplified search purposes. Actual motor plate voltage for this unit is typically 400V Delta / 690V Star – wiring should always be carried out in accordance with the motor nameplate and manufacturer instructions.

Frequently Asked Questions

What does the model number mean?

• N – Flygt high-efficiency non-clog adaptive impeller design
• S – Portable / semi-permanent wet well arrangement. The pump is supplied with a standard drilled flange, and a hose elbow or guide-rail claw can be fitted as required (supplied separately)
• 3127 – Pump model series
• .191 – Explosion-proof (Ex) version
• MT – Motor / pressure class designation
• 438 – Impeller type

How can this S version be installed?

The S configuration is intended for portable or semi-permanent wet well use. The unit is supplied with a standard DN100 drilled flange. From this flange you can fit either a hose elbow for flexible discharge, or a guide-rail claw for fixed installations. Claws from Flygt or compatible third-party manufacturers can be used to suit an existing system. All hose tails and claws are supplied separately.

What is the Flygt N-impeller?

The N-impeller is a high-efficiency wastewater hydraulic developed to handle rags and long-fibered material while maintaining stable performance. Unlike conventional channel impellers that can lose efficiency as debris builds up, the N design aims to keep the flow paths clear so the pump continues to operate close to its original duty over time.

What does adaptive mean?

Adaptive refers to the impeller’s ability to move slightly along the shaft when bulky debris passes, temporarily increasing internal clearance. This allows difficult material to pass before the impeller returns to its normal position for efficient operation.

Why would I choose an Adaptive N pump?

It is designed to deliver the efficiency of a conventional wastewater impeller while offering clog resistance closer to that of a vortex hydraulic. The adaptive movement allows bulky rags and fibrous material to pass with less risk of blockage, without giving up the higher efficiency normally associated with channel designs.

What it is – and what it is not

An N-impeller is designed to pass solids more reliably and sustain efficiency, but it is not a grinder and should not be described as “zero-clog.” Suitability should always be confirmed against the manufacturer curve and the nature of the pumped media.

What applications is this pump suitable for?

This model is commonly used for municipal sewage pumping, industrial wastewater, surface water transfer, and applications where the liquid may contain rags, fibers, or other solids that could block a standard impeller.

Can this replace my existing Flygt pump?

In many cases, yes. If you provide your existing model number or duty point, we can confirm suitability before purchase.

Please send photos of your current discharge connection and installation arrangement and we can advise on the most practical way to connect this pump.

Do you offer technical support?

Yes — we provide free technical advice prior to purchase. Please call 01803 220416.

About Our Stock

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