Grundfos Magna1 D 40-120 F 250 Circulator Pump 240V 99221310 #4884 USED

Grundfos MAGNA1 D 40-120 F 250 – 240V Twin-Head Circulator Pump (99221310) #4844 USED

This listing is for a Grundfos MAGNA1 D 40-120 F 250 high-efficiency twin-head canned-rotor circulator pump with DN40 PN6/10 flanged connections and a 250 mm port-to-port length. It is designed for heating, cooling and clean circulation systems where reliable variable-speed performance and twin-head duty/standby style operation are required.

Condition: supplied as a used pump. The unit has been previously installed/used and may show cosmetic wear consistent with service use. It is inspected prior to dispatch. Guarantee: supplied with a 6-month guarantee.

• Pump type: MAGNA1 D twin-head canned-rotor circulator
• Grundfos product number: 99221310
• EAN: 5712608942839
• Connection: DN40 PN6/10 flanged
• Port-to-port length: 250 mm
• Electrical supply: 1 × 230 V / 240 V class, 50 Hz
• Maximum head: 12 m
• Maximum flow: 6.4 L/s / 23.0 m³/h
• Control: electronically controlled variable-speed operation
• Motor: permanent-magnet motor with integrated frequency converter
• Design: glandless canned-rotor pump with no conventional shaft 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 MAGNA1 D 40-120 F (99221310) – Variant curves

Typical applications

• Heating systems and boiler circuits
• Commercial building-services circulation
• District heating and district cooling
• Air-conditioning and chilled water systems
• Mixing loops and plant-room circulation
• Replacement of matching DN40 twin-head circulators

Frequently Asked Questions

What does the model number mean?

• MAGNA1 – Grundfos high-efficiency circulator range with simple control and monitoring
• D – twin-head version
• 40 – nominal connection size, DN40
• 120 – maximum head class, approximately 12 m
• F – flanged connection
• 250 – port-to-port length in millimetres

What connection does this pump have?

This pump has DN40 PN6/10 flanged connections with a 250 mm port-to-port length. Please check the flange size, pressure rating and pipework gap against your existing pump before ordering.

What does the twin-head design do?

The MAGNA1 D is a twin-head circulator with two pump heads mounted on a common body. Twin-head pumps are commonly used where duty/standby operation, service resilience or duty sharing is required, depending on how the system is configured.

Is this suitable to replace other DN40 twin-head circulators?

This model uses DN40 PN6/10 flanges with a 250 mm port-to-port length. Where dimensions and duty are comparable, it can replace other DN40 twin-head in-line circulators from brands such as Wilo, Lowara and KSB, subject to hydraulic duty, flange standard, electrical supply and control compatibility.

The advantage of an electronically controlled circulator is that it can often be adjusted during commissioning to better match the required duty of the pump being replaced, rather than being locked to one fixed-speed curve.

What liquids can this pump be used with?

MAGNA1 is suitable for thin, clean, non-aggressive liquids that do not contain solid particles or fibres. Typical uses include heating water, chilled water and clean circulation duties.

Water/glycol mixtures may be used, but glycol concentration and temperature affect viscosity, performance and pump selection. Refer to Grundfos documentation and glycol supplier guidance before use with glycol mixtures.

Not suitable for:

• Liquids containing solid particles or fibres
• Flammable liquids
• Oils or aggressive chemicals
• Sea water or aggressive saline solutions
• Dirty water, wastewater or drainage applications

Does this pump have a mechanical shaft seal?

No. MAGNA1 is a canned-rotor circulator, so there is no conventional mechanical shaft seal.

Why choose MAGNA1 instead of MAGNA3?

MAGNA1 is usually chosen when you need a reliable, energy-efficient circulator with simpler setup and lower cost. MAGNA3 adds more advanced features such as expanded monitoring, energy metering and additional communication/control options.

Can this pump be controlled or monitored externally?

MAGNA1 includes basic control and monitoring functions, including fault relay, digital start/stop input and wireless communication with Grundfos GO Remote. Please check the required control functions against your system before ordering.

Is this a new pump?

No. This item is supplied as used. It has been inspected prior to dispatch and is supplied with a 6-month guarantee.

About Our Stock

Stock code: #4844
We specialise in supplying used and surplus pumps. This unit is inspected prior to dispatch and supplied with a 6-month guarantee.