Atmos Giga NHT

Norm pump

The dedicated pump for district heating and industrial heat supply applications.

Universally usable thanks to standardised dimensions, a range of motor options and impellers as well as mechanical seals adapted to the type of fluid
High reliability through heat-resistant ductile cast-iron casing, large-volume sealing chamber and pressure resistant flange (PN 25)
High overall efficiency through improved hydraulics with MEI > 0.4; the use of IE3/IE4 motors enables high energy savings
Self-cooling mechanical seal instead of additional cooling systems allows for an easy installation
User-friendly spacer coupling in back pull-out design for easy maintenance
Self-cooling technology instead of a cooling system with additional water consumption provides high sustainability
Optional: Wilo-EFC for easy operation and further energy savings

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The dedicated pump for district heating and industrial heat supply applications.

Standardised dimensions, different motor variants, impellers and sliding directional seals make the Wilo-Atmos GIGA-NHT a universally applicable long-coupled end suction pump for transporting hot fluids. Its heat- and pressure-resistant design offers high reliability for transporting water with temperatures ranging from 0 to above 200 °C, as well as oil with temperatures from -20 to 350 °C. The pump, which has been specially developed for continuous operation, is characterised by low life cycle costs, as its self-cooling technology means that there is no need for an additional cooling system and its roller bearings are maintenance-free. With an MEI > 0.4 and the use of IE3/IE4 motors, it has a high overall efficiency. Energy consumption can be further reduced by means of speed control using an optionally available Wilo-EFC. In case of maintenance, the spacer coupling ensures that the mechanical seal can be replaced as quickly as possible. In this case, Wilo offers additional, supplementary services ranging from commissioning to maintenance, and the comprehensive WiloCare full-service package is designed to ensure optimum operational reliability.

Design

Single-stage, low-pressure centrifugal pump with axial suction, mounted on a baseplate. Standard version with spacer coupling.

Application

Hot-water heating systems
Cooling and chilled water circulation systems
District heating loops up to 200 °C
Industrial water cycles up to 200 °C
Industrial heat transfer oil circuit systems up to 350 °C

Equipment/function

Single-stage low-pressure centrifugal pump in a long-coupled end suction pump design with coupling, coupling guard, motor and baseplate. The pump is sealed with a mechanical seal.

Type key

Example:	Atmos GIGA-NHT 40/200-11/2
Atmos	Product family
GIGA	Series designation
NHT	Design
	NHT = long-coupled end suction pump for high-temperature applications
40	DN for the discharge flange
200	Impeller nominal diameter [mm]
11	Rated power P₂ [kW]
2	Number of poles

Technical data

Permissible temperature range:
- -20 °C … +350 °C (heat carrier oil)
- 0 … +200 °C (water)
Mains connection 3~400 V, 50 Hz
IP rating IP55
Nominal diameter DN 32 to DN 150
Max. operating pressure 25 bar

Materials

Pump housing and lantern. Standard: EN-GJS-400-15
Impeller: EN-GJL-250
Shaft: 1.4021
Mechanical seal:
- AQ7EGG (water)
- AQ1VGG (heat carrier oil)

Construction

Single-stage low-pressure centrifugal pump as baseplate pump with axial suction ports with flanged bearing brackets and axle fastening for flexibly coupled drives
Spacer coupling (sleeve coupling) is standard; this provides the option of leaving the motor in position when dismantling the rotor unit

Scope of delivery

Pump
Installation and operating instructions
Bare shaft pump or
Pump on baseplate with coupling and coupling guard, without motor or
Completely mounted pump on baseplate with electric motor

Installation and operating instructions

Wilo-Atmos GIGA-NHT

Article Number: 8249758

Issue date: 2023-10

Edition: 01

Language: en

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