Grundfos TP 40-90/2 A F A BUBE 240V Circulator Pump 96408476 DN40 0.25kW #4483

GRUNDFOS TP 40-90/2 A-F-A-BUBE – 0.25 kW 240V In-Line Circulator Pump (96408476) #4483

This listing is for a Grundfos TP pump from the TP family of dry-rotor, single-stage in-line circulator pumps. It is a single-head, fixed-speed unit with identical in-line suction and discharge ports, designed for heating, cooling and light industrial circulation duties where simple, reliable pump construction is required.

The pump uses the top-pull-out design, meaning the power head (motor, pump head and impeller) can be removed for maintenance while the pump housing remains in the pipework.

Condition: supplied as pictured. The unit is inspected prior to dispatch.
Guarantee: supplied with our 2-year guarantee.

• Pump type: TP family – dry-rotor, single-stage in-line circulator (single-head)
• Control: fixed-speed operation
• Connection: DN40 DIN flanges (PN6/10)
• Port-to-port length: 250 mm
• Service design: Top-pull-out – power head removable without disturbing pipework
• Shaft seal: BUBE mechanical seal

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

Manufacturer product page

Full technical specifications, curves and documentation can be viewed on the official Grundfos product page:
View Grundfos TP 40-90/2 (96408476) – Variant details

Key specifications (summary)

• Model: TP 40-90/2 A-F-A-BUBE
• Grundfos product number: 96408476
• Rated motor output (P2): 0.25 kW
• Electrical supply: 1 × 220–240 V, 50 Hz
• Connection: DN40, PN6/10 DIN flanges
• Port-to-port length: 250 mm
• Shaft seal: BUBE

Typical applications

• Heating systems and boiler circuits
• Small district heating loops
• Air-conditioning and chilled water systems
• Light industrial circulation
• Building services and HVAC installations

Frequently Asked Questions

What does the model number mean?

• TP – TP pump range (dry-rotor in-line circulator)
• 40 – nominal diameter of inlet and outlet ports (DN40)
• 90 – head series designation
• /2 – 2-pole motor
• A – basic version
• F – DIN flange connections
• A – basic version
• BUBE – shaft seal code

What does the BUBE shaft seal code mean?

• B – rubber bellows seal construction
• U – tungsten carbide seal face
• B – carbon, plastic-impregnated counterface
• E – EPDM elastomers

Seal operating temperature (BUBE): suitable from 0 °C up to 120 °C in water duties (EPDM-limited).

Why choose the BUBE seal?

The BUBE seal uses a tungsten carbide against carbon-impregnated graphite face pairing. This combination provides the wear resistance of tungsten carbide together with the self-lubricating, low-noise properties of carbon, offering better behaviour in hot water and improved tolerance to brief dry running compared with hard/hard pairings.

What liquids can this pump be used with?

This pump is typically suitable for clean circulation liquids compatible with EPDM, such as:

• Heating system water meeting accepted water quality standards
• Cooling and chilled water circuits
• District heating water
• Condensate
• Softened water
• Clean industrial circulation liquids compatible with EPDM

Not suitable for:

• Liquids containing solid particles or fibres
• Flammable liquids
• Mineral oils or synthetic oils
• Strong chemicals or solvents that attack EPDM
• Sea water or aggressive saline solutions

Is this suitable to replace other DN40 circulators?

This model uses DN40 PN6/10 DIN flanges with a port-to-port length of 250 mm. Where dimensions match, it can replace other DN40 in-line circulators from manufacturers such as Wilo, Lowara and KSB, subject to hydraulic duty and system requirements.

Can the motor be removed without draining the system?

Yes – the pump uses a top-pull-out design, so the power head can be removed while the pump housing remains installed in the pipework.

About Our Stock

Stock code: #4483
We specialise in supplying quality pumps and equipment. This unit is inspected prior to dispatch and supplied with a 2-year guarantee.