Grundfos UMC/D 65-60 Circulator Replacement Pump Head 240V 96406330 #5009/17

Grundfos UMC/D 65-60 Circulator Replacement Pump Head 240V 96406330 #5009

This listing is for a Grundfos UMC/D 65-60 replacement circulator pump head, current part number 96406330, also associated with old / superseded part number 56632673. It is a genuine Grundfos replacement head for compatible UMC 65-60 and UMCD 65-60 commercial circulator pump assemblies.

This is a replacement pump head only. It is not a complete pump and does not include the pump body, flanges, valves, pipework or complete circulator assembly. It is intended for repairing an existing compatible Grundfos installation where the pump body and pipework are being retained.

Compatibility note: UMC replacement heads can also fit the corresponding Grundfos UMS range, including suitable UMS 65-60 installations, where the existing pump head, body interface and electrical specification match. Please check the existing pump nameplate, head fixing, terminal box arrangement and photos before ordering.

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

• Manufacturer: Grundfos
• Part type: replacement circulator pump head / motor head
• Model reference: UMC/D 65-60
• Current replacement head part number: 96406330
• Old / superseded part number: 56632673
• Stock code: #5009
• Suitable pump range: UMC / UMCD 65-60
• Additional compatibility: may also fit corresponding UMS 65-60 pump assemblies, subject to confirmation
• Electrical supply: 240V, single-phase, 50Hz
• Pump style: glandless wet-rotor circulator head
• Model head reference: 65-60 / 6m head class
• Use: replacement head for compatible UMC, UMCD and corresponding UMS circulator pump bodies
• Compatibility: check existing pump model, nameplate, head interface, terminal box arrangement and electrical supply before purchase
• Obsolescence note: this is a legacy Grundfos spare that is now difficult to obtain through normal distributor channels

Need help confirming compatibility?
Call us on 01803 220416 or send photos of your existing pump nameplate, terminal box and pump body.

Technical documentation

Archived Grundfos UMC / UPC in-line circulator brochure:
View Grundfos UMC / UPC in-line circulator brochure

Typical applications

• Replacement head for compatible Grundfos UMC 65-60 circulators
• Replacement head for compatible Grundfos UMCD 65-60 twin-head circulators
• Possible replacement head for corresponding Grundfos UMS 65-60 circulators, subject to confirmation
• Commercial heating circulation
• HVAC circulation systems
• Clean closed-loop water circulation
• Repair of legacy 240V single-phase circulator installations without changing pipework

Frequently Asked Questions

What is this item?

This is a replacement pump head for compatible Grundfos UMC/D 65-60 circulator pumps. It replaces the motor/head section of the pump while retaining the existing pump body, flanges and pipework.

Is this a complete pump?

No. This is the pump head only. It is intended for replacing a failed head on an existing compatible pump body.

Is 56632673 the same part?

56632673 is an older / superseded Grundfos reference associated with this replacement head. The current replacement head part number used for this listing is 96406330. When checking compatibility, compare both the old part number and the current part number against the existing pump model, size, voltage and head/body interface.

What does UMC/D mean?

The wording UMC/D is used because this replacement head is suitable for both UMC single-head pump assemblies and UMCD twin-head pump assemblies of the corresponding 65-60 size, where the existing head and body interface match.

Does this fit the UMS range?

Yes, UMC replacement heads can also fit the corresponding Grundfos UMS range, including suitable UMS 65-60 installations. Compatibility should still be confirmed against the existing pump nameplate, pump body, head interface and electrical supply before ordering.

What voltage is this head?

This is a 240V, single-phase, 50Hz replacement head. It is intended for existing single-phase commercial heating circulator installations and is not a 415V three-phase replacement head.

What does 65-60 mean?

The 65 refers to the pump size / DN65 circulator family, and 60 refers to the 6m head class. This replacement head is for the 65-60 size range, not the smaller 50-60 or larger 80-60 versions.

Does this fit UMCD twin-head pumps?

Yes. This head can be used on compatible UMCD 65-60 twin-head pump assemblies. On twin-head pumps, only the failed head is normally replaced while the shared pump body remains in place.

Why choose this replacement head instead of a modern high-efficiency circulator?

The main advantage is that this head allows a like-for-like repair of an existing UMC, UMCD or corresponding UMS 65-60 installation. If the existing pump body, flanges and pipework are still sound, replacing only the head can avoid disturbing the pipework and can be much simpler than changing the complete circulator.

Modern high-efficiency circulators can be a good option, but a full replacement may require checks on port-to-port length, flange standard, electrical supply, control method, minimum inlet pressure and commissioning settings. A correct original-style replacement head keeps the repair closer to the original pump arrangement that the system was designed around.

What about NPSH or minimum inlet pressure?

When changing an older circulator for a modern high-efficiency replacement, the minimum inlet pressure / NPSH requirement should be checked. Modern circulators may have different minimum inlet pressure requirements to avoid cavitation noise and bearing damage, especially at higher liquid temperatures.

Using the correct original-style replacement head keeps the pump closer to the original hydraulic arrangement. It does not remove the need to check system pressure, water temperature and system condition, but it avoids introducing a different modern pump design with different inlet-pressure assumptions.

Should the terminal box be changed at the same time?

Distributor information for this type of replacement head often recommends changing the terminal box with the head to help prolong pump life. If the existing terminal box is old, heat-damaged, water-damaged or showing signs of electrical wear, it should be inspected and replaced where required by a competent person.

Does this pump head have a mechanical shaft seal?

No. This is a glandless wet-rotor circulator head, so it does not use a conventional mechanical shaft seal like a dry-rotor pump. The pumped liquid lubricates and cools the rotor/bearing assembly, so the pump must not be run dry.

What liquids is it suitable for?

This head is intended for clean commercial heating and HVAC circulation water duties in compatible UMC, UMCD and corresponding UMS pump bodies. Suitability depends on the full pump body, system water quality, temperature, pressure and electrical installation.

Can this handle dirty water or sludge?

No. This type of circulator head is for clean closed-loop circulation duties. It is not designed for dirty water, sewage, sludge, abrasive solids, fibres or heavily contaminated systems. Poor system water quality can damage the rotor and bearing assembly.

Is this still available from Grundfos?

This is a legacy Grundfos replacement head and is now difficult to obtain through normal distributor channels. Some spares listings show this part as discontinued or obsolete with no known replacement, so surplus stock can be useful where an existing UMC, UMCD or corresponding UMS installation needs to be kept running.

What should I check before ordering?

• Existing pump model: UMC, UMCD or corresponding UMS
• Existing size: 65-60
• Current replacement head part number: 96406330
• Old / superseded part number: 56632673
• Electrical supply: 240V, single-phase, 50Hz
• Head/body interface and bolt pattern
• Terminal box condition and wiring arrangement
• System water quality and whether the pump body is still serviceable
• Minimum inlet pressure / NPSH suitability if considering a modern alternative

About Our Stock

Stock code: #5009
We specialise in supplying new and unused surplus commercial pump equipment and replacement pump heads. This item is supplied in as new surplus condition and may show minor cosmetic marks from storage and handling.

This item is supplied with a 2-year guarantee. Please check the part number, voltage, pump size and compatibility carefully before purchase. If unsure, send us photos of your existing pump and we will help confirm suitability.