Grundfos TP 32-50/2 96408473 B A-O-Z BUBE 415v Bronze Centrifugal In Line Pump #1935

GRUNDFOS TP 32-50/2 B A-O-Z BUBE – 415V Bronze In-Line Centrifugal Pump (96408473) #1935

This listing is for a Grundfos TP pump from the TP family of dry-rotor, single-stage in-line centrifugal pumps. The “B/I” series uses a bronze pump housing with a stainless-steel impeller and is primarily intended for applications such as hot water recirculation and general HVAC circulation. It is a fixed-speed, close-coupled in-line centrifugal unit with a mechanical shaft seal and union connection.

Condition: supplied as surplus / unused stock. The unit may show cosmetic marks consistent with storage and handling. It is inspected prior to dispatch and confirmed free-turning and operational.
Guarantee: supplied with our 2-year guarantee.

• Pump type: TP bronze in-line centrifugal (single-stage, single-head)
• Control: fixed-speed motor
• Connection: 2″ union (PN 10)
• Port-to-port length: 180 mm
• Shaft seal: BUBE mechanical seal

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

Manufacturer product page

Full technical specifications, performance curves and documentation can be found on the official Grundfos product page:
View Grundfos TP 32-50/2 B A-O-Z BUBE (96408473) – Variant details

Key specifications (summary)

• Model: TP 32-50/2 B A-O-Z BUBE
• Grundfos product number: 96408473
• Rated motor output (P2): 0.12 kW
• Electrical supply: 3 × 220–240 V Δ / 380–415 V Y, 50 Hz (listed as 415 V)
• Connection: 2″ union, PN 10
• Port-to-port length: 180 mm
• Impeller material: stainless steel
• Shaft seal: BUBE

Typical applications

• Heating systems and hot water circulation
• Air-conditioning chilled water circuits (above 0 °C)
• Boiler feed and return loops
• Domestic and light industrial circulation duties
• Building services and HVAC installations

Frequently Asked Questions

What does the model number mean?

• TP – TP pump range (dry-rotor in-line centrifugal)
• 32 – nominal diameter of suction/discharge
• 50 – head series designation
• /2 – 2-pole motor
• B – bronze version
• A – basic version
• O – union connection style
• Z – bronze housing
• 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 good behaviour in clean water recirculation duties and improved tolerance to brief dry running compared with hard/hard seal 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
• Chilled water circuits (above 0 °C)
• Hot water recirculation
• 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
• Aggressive chemicals or solvents that attack EPDM
• Sea water or aggressive saline solutions

Is this suitable to replace other 2″ union circulators?

This model uses a 2″ union connection with a port-to-port length of 180 mm. It can replace other bronze or similar in-line circulators with equivalent union connections, 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 or union connection.

About Our Stock

Stock code: #1935
We specialise in supplying quality pumps and equipment. This unit is supplied as surplus stock, inspected prior to dispatch and supplied with a 2-year guarantee.