Flygt NT 3171 HT 15.0kW 3~ – IE3 Premium Efficiency, Hard-Iron™ Ex (Impeller 452-455)

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Established 1975
Trusted by thousands of customers

Flygt NT 3171 HT 15.0 kW 3~ dry-well (T-type) submersible pump — IE3 Premium Efficiency, Hard-Iron™ build, Ex (ATEX), impeller 452-455. Self-cleaning N-hydraulic, dry-chamber installation.

Full Description

More about this product

Full Description

The Flygt NT 3171 is a heavy-duty dry-well (T-type) installation pump fitted with the self-cleaning Flygt N hydraulic. This configuration is the IE3 Premium Efficiency, Hard-Iron™ build in a high head duty, rated 15.0 kW 3-phase on impeller 452-455. Designed for permanent installation in a dry chamber alongside the wet well, it gives reliable, accessible pumping of unscreened wastewater, process effluent and storm flows.

At a glance

15.0 kW

Motor power

High head

Duty / head

452-455

Impeller

IE3 Premium Efficiency

Build

Dry-well (T)

Installation

Flygt N

Hydraulic

Specification

Series	Flygt NT 3171
Installation	Dry-well, T-type (permanent)
Hydraulic	Flygt N (self-cleaning)
Duty / head class	High head
Motor rating	15.0 kW
Supply	3-phase
Impeller	452-455
Cooling	Integral cooling jacket
Cable (standard)	10 m
Cable spec	7G2.5+2×1.5
Build / version	IE3 Premium Efficiency, Hard-Iron™ (code 830)
Hazardous-area	ATEX Ex-rated (zone-compliant)

Applications

Municipal wastewater

Pumping stations and treatment-works transfer where the pump is sited in a dry, accessible chamber.

Industrial & process effluent

Robust handling of contaminated and abrasive process flows in a permanent dry-well set-up.

Storm & drainage

High-capacity storm and surface-water transfer with the self-cleaning N-hydraulic resisting clogging.

Raw water transfer

Reliable bulk transfer of raw and partially screened water for permanent installations.

Good to know

Is this an Ex / ATEX pump?

Yes – this listing is the ATEX Ex-rated build for use in classified hazardous areas.

What does “dry-well (T-type)” mean?

The pump is installed in a dry chamber next to the wet well rather than submerged. It stays accessible for inspection and service while drawing flow through a suction connection.

What is the Flygt N hydraulic?

A self-cleaning impeller design that sweeps stringy and fibrous solids back into the flow, maintaining efficiency and reducing the risk of clogging.

Does it include monitoring?

FLS leakage sensing is fitted as standard. MINI CAS monitoring relays are available as an option.

Configuration shown reflects the manufacturer build for this duty point. Standard cable length as listed; longer cable to order.

Delivery Information

Standard delivery:
Standard delivery is free on most orders. Some items may incur a delivery charge depending on weight, size or value. Any applicable charge will be displayed at checkout.

Deliveries will typically be made between 7am and 6pm, Monday to Friday (excluding public holidays).

Next day delivery:
Next working day delivery is available for a £16.50 + VAT delivery charge.

Orders must be placed before 12 noon to qualify for next working day delivery. Orders placed after 12 noon on Thursday but before noon on Friday will be delivered the following Monday. Orders placed after 12 noon on Friday will be delivered on Tuesday.

Pallet/Large/Difficult items:
Some large, heavy or difficult to transport items may incur an additional delivery charge. Please contact us for a delivery quote before ordering.

Frequently Asked Questions

Quick answers to common questions about the Flygt NT 3171 HT 15.0kW 3~ – IE3 Premium Efficiency, Hard-Iron™ Ex (Impeller 452-455). For technical specifications, see the product details above; for sizing or installation advice, contact our team. If you have any other questions, we're happy to help.

What is a submersible pump?

A submersible pump is designed to operate fully submerged in the liquid it is moving. The motor is sealed inside the pump body and cooled by the surrounding water. Submersibles are used for drainage, sewage, septic tanks, deep wells and boreholes, and for raising water from sumps, cellars and floodwater. Many stocked at Anglian Pumping handle solids in suspension.

Can submersible pumps handle solids and sewage?

Yes – some submersibles are designed for clean water only, others handle solids up to 50 mm or full raw sewage. Anglian Pumping stocks ABS, BBC, Flygt and T-T Submersibles ranges that include vortex, single channel and grinder impellers for different solids handling requirements. Always match the pump to the maximum solid size and the type of effluent it will see.

When should I use a submersible pump instead of a surface pump?

Use a submersible when the water level is more than around 8 metres below the pump installation point – surface pumps cannot self-prime beyond that depth. Submersibles are also better when the liquid contains solids, when noise must be minimised, or when the pump needs to operate in confined spaces such as sumps and chambers where a surface pump would not fit.