CR / CRI / CRN cartridges
Drop-in cartridge seals for the Grundfos multistage CR range, pre-set and ready to fit.
Grundfos Mechanical Seal Replacements
Drop-in Grundfos mechanical seal replacements for CR, CRI, CRN and other Grundfos pumps — built to OEM dimensions at manufacturer-direct pricing.
We build most Grundfos seals, not only the types named on this page. Send the seal part number, a drawing or the old seal.
Common requests: CR / CRI / CRNSiC / SiCCarbon / SiCOEM dimensionsCustom
We are the manufacturer, not a reseller — we build in-house and supply at quantities that work for a distributor, an OEM or a maintenance department.
Drop-in fitto Grundfos seal envelopes
OEM dimensionsmatched faces, springs and hardware
Cost savingsmanufacturer-direct vs OEM pricing
Selection
Why a Grundfos-compatible seal
- Same fit, lower cost
Built to Grundfos dimensions so the Grundfos mechanical seal replacement drops into the same pump.
- Cartridge convenience
Pre-set cartridge units, for example for the CR multistage range, with no field setting.
- Matched materials
Carbon/SiC for clean water, SiC/SiC and FFKM for harder and chemical duty.
- Obsolete models covered
Discontinued Grundfos seals reverse-engineered from a sample.
Most Grundfos ranges use cartridge seals — see our cartridge mechanical seals.
Range
What we supply
Drop-in equivalents across the Grundfos range, OEM-compatible or fully custom.
Single seal equivalents
Component single seals for smaller Grundfos circulators and end-suction pumps.
Custom & obsolete
Non-standard or discontinued Grundfos seals machined from a sample or drawing.
Photographed in our shop
From our bench
Seals as they leave the shop. Faces, springs and elastomers vary with the duty.
Selection guide
Match the seal to your Grundfos pump
The pumped liquid sets the face pair and elastomer. Send the seal part number, a drawing or the old seal and we confirm. The table is a starting point.
| Service | Face pair | Elastomer |
|---|---|---|
| Clean water | Carbon / SiC | EPDM |
| Chemical | SiC / SiC | FFKM |
| Hot water | SiC / SiC | Viton |
OEM-compatible equivalents built to the original envelope — not sold as genuine Grundfos parts.
Go deeper: Cartridge seals · all seal types.
From our catalog
Grundfos-type seals from our catalog
Catalog models GLF-1, GLF-2, GLF-3 and GLF-5, examples of the Grundfos-type seals we build. Send the seal part number, a drawing or the old seal and we match it.
FAQ
Grundfos-Compatible Seal FAQ
Are these genuine Grundfos seals?
No — they are OEM-compatible equivalents built to Grundfos dimensions at manufacturer-direct pricing. They are not sold as genuine Grundfos parts.
Will it fit my Grundfos pump?
Built to the same cartridge envelope as the original. Send the Grundfos seal part number, a drawing or the old seal and we confirm the fit before quoting.
Can you match obsolete Grundfos seals?
Yes — we reverse-engineer discontinued models from a sample or drawing.
How much can I save versus OEM?
As the manufacturer we supply direct, typically well below OEM list, without down-speccing materials.
Source Grundfos-Compatible Seals At Scale
OEM-compatible, custom-machined and private-label Grundfos equivalents built in-house to your spec, at low minimums. Send the seal drawing, the seal model or a sample and we’ll quote.