Grundfos TPE2 50-240 N-A-F-A-BQQE-IYC Circulator Pump 415V 2.2kW 98437897 #4874

Grundfos TPE2 50-240 N-A-F-A-BQQE-IYC – 2.2 kW 415V Variable-Speed In-Line Circulator Pump (98437897) #4874

This listing is for a Grundfos TPE2 50-240 pump from the TP family of dry-rotor, single-stage in-line circulator pumps. It is a single-head, electronically speed-controlled unit with in-line suction and discharge ports of identical diameter, designed for heating, cooling and industrial circulation duties where efficient variable-speed operation and serviceability are important.

Condition: supplied in as new surplus condition – the unit has not been installed or used but may show minor cosmetic markings from storage and handling. Guarantee: supplied with a 2-year guarantee.

• Pump type: TPE2 single-head dry-rotor in-line circulator
• Grundfos product number: 98437897
• Connection: DN50 PN6/10 DIN flanges
• Port-to-port length: 280 mm
• Rated motor output: 2.2 kW
• Electrical supply: 3 × 380–500 V, 50/60 Hz
• Motor: ECM permanent-magnet motor with integrated frequency converter
• Speed variant: 4000–5900 RPM ECM
• Efficiency class: IE5
• Sensor version: N version – supplied without built-in differential-pressure and temperature sensor
• Service design: top-pull-out design – power head removable without disturbing pipework
• Shaft seal: BQQE mechanical seal

Important commissioning note:
This TPE2 pump should be programmed and commissioned using Grundfos GO Remote. The correct control mode, setpoint, external sensor setup and operating limits must be configured on site to suit the application.

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 TPE2 50-240 N-A-F-A-BQQE-IYC (98437897) – Variant specifications

Technical documentation

Grundfos TP, TPE, TPE2 and TPE3 technical documentation can be viewed here:
View Grundfos TPE3, TPE2, TPE Series 2000/1000, TP and TPD data booklet

Typical applications

• Heating systems and boiler circuits
• District heating and district cooling
• Air-conditioning and chilled water systems
• Industrial circulation loops
• Building services and HVAC installations

Frequently Asked Questions

What does the model number mean?

• TPE2 – electronically speed-controlled in-line circulator, without built-in differential-pressure and temperature sensor
• 50 – nominal diameter of inlet and outlet ports, DN50
• 240 – maximum head class, 240 dm / approximately 24 m
• N – without built-in sensor
• A – basic pump version
• F – DIN flange connection
• A – basic materials version
• BQQE – shaft seal code
• IYC – motor / regulatory / speed suffix:
  • I – 2.2 kW rated motor power
  • Y – out of DOE scope
  • C – 4000–5900 RPM ECM speed variant

What is the difference between TPE, TPE2 and TPE3?

TPE is Grundfos’ electronically speed-controlled version of the TP dry-rotor in-line circulator range. TPE2 is a newer-generation electronically controlled in-line pump without built-in differential-pressure and temperature sensors. TPE3 is the more advanced version with built-in sensor functions and additional intelligent features such as AUTOADAPT, FLOWADAPT, FLOWLIMIT, heat-energy monitoring and flow estimation on suitable models.

For this pump, the key point is that it is a variable-speed TPE2, but it does not have the built-in sensor package of a TPE3. Any pressure, temperature, flow or level-based control will normally require a suitable external sensor, controller or BMS signal.

What control modes are available on this TPE2 pump?

This pump has an integrated frequency converter and can be commissioned for different control modes depending on the system design and connected sensors.

Available control modes can include:

• Proportional pressure
• Constant pressure
• Constant temperature
• Constant differential pressure
• Constant differential temperature
• Constant flow rate
• Constant level
• Constant other value
• Constant curve

Note: AUTOADAPT and FLOWADAPT are associated with TPE3 versions with built-in sensor functions and should not be assumed available on this TPE2 N model.

What does BQQE mean?

BQQE describes the mechanical seal construction and materials:

• B – rubber bellows seal construction
• Q – silicon carbide rotating seal face
• Q – silicon carbide stationary seal face
• E – EPDM elastomers

BQQE is commonly used for heating and cooling water duties compatible with EPDM. The silicon carbide / silicon carbide seal faces offer good wear resistance and are useful for hot water applications.

What liquids can this pump be used with?

This pump is typically suitable for clean circulation liquids compatible with cast iron and EPDM, including heating water, chilled water, district heating/cooling water, condensate, softened water and clean industrial circulation liquids.

Water/glycol mixtures may be used, but allowable temperature and concentration depend on the full system design, seal selection and operating conditions. Refer to the Grundfos liquid compatibility guidance before use with glycol or brines.

Not suitable for:

• Liquids containing solid particles or fibres
• Flammable liquids
• Mineral oils or synthetic oils without suitable alternative seal selection
• Strong chemicals or solvents that attack EPDM
• Sea water or aggressive saline solutions
• Dirty water, wastewater or drainage duties

Is this suitable to replace other DN50 circulators?

This model uses DN50 PN6/10 DIN flanges with a 280 mm port-to-port length. Where dimensions and duty are comparable, it can replace other DN50 in-line circulators from brands such as Wilo, Lowara and KSB, subject to hydraulic duty, flange standard and control compatibility.

The advantage of a variable-speed circulator is that it can often be tuned during commissioning to better match the duty of the pump being replaced, rather than being locked to one fixed-speed curve.

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: #4874
We specialise in supplying new and unused surplus pumps. All units are inspected prior to dispatch and supplied with a 2-year guarantee.