Submersible cartridge seals
Drop-in cartridge units built to common Flygt submersible pump dimensions.
Flygt-Compatible Pump Mechanical Seals
Drop-in replacement seals for Flygt submersible pumps — built to the original cartridge dimensions in abrasion-resistant materials.
We build most Flygt seals, not only the types named on this page. Send the seal part number, a drawing or the old seal.
At a glance
- 01Submersible cartridge
- 02SiC / SiC
- 03WC / WC
- 04OEM dimensions
- 05Custom & obsolete
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 Flygt submersible envelopes
Abrasion-resistantSiC/SiC and tungsten-carbide faces
Cost savingsmanufacturer-direct vs OEM pricing
Selection
Why a Flygt-compatible seal
- Built for grit
SiC/SiC and tungsten-carbide faces survive the sand and solids in wastewater and drainage.
- Drop-in cartridge
Matched to Flygt dimensions so it slides into the same pump.
- Lower cost, faster
Manufacturer-direct, with no long OEM lead time.
- Obsolete models covered
Discontinued Flygt seals reverse-engineered from a sample.
See our submersible & wastewater pump seals for the full application picture.
Range
What we supply
Drop-in cartridge units for the common Flygt submersible range, OEM-compatible or fully custom.
Abrasion-resistant pairs
SiC/SiC and WC/WC faces for grit-laden wastewater and stormwater duty.
Custom & obsolete
Non-standard or discontinued Flygt seals machined from a sample or drawing.
Selection guide
Match the seal to the service
Face pair follows the solids load. Send the seal part number, a drawing or the old seal and we confirm. The table is a starting point.
| Service | Face pair | Form | Elastomer |
|---|---|---|---|
| Wastewater | SiC / SiC | Cartridge | FKM |
| Stormwater / drainage | SiC / SiC | Cartridge | NBR |
| Sludge / grit | WC / WC | Cartridge | FKM |
| Clean transfer | Carbon / SiC | Cartridge | NBR |
OEM-compatible equivalents built to the original envelope — not sold as genuine Flygt parts.
Go deeper: Submersible & wastewater seals · all seal types.
From our catalog
Flygt-type seals in our catalog
Common requests from our catalog, not the limit of what we build for Flygt pumps: send the seal part number, a drawing or the old seal.
| Model | Standard sizes (d1) | Pressure | Speed | Temperature |
|---|---|---|---|---|
| WM X | 20 – 35 mm | ≤ 1.0 MPa | ≤ 5 m/s | -30 to +200 °C |
| WM XE | 20 mm (on drawing) | ≤ 1.2 MPa | ≤ 10 m/s | -30 to +180 °C |
| WM XC-35/XC-45 | 35 / 45 mm (on drawing) | ≤ 1.0 MPa | ≤ 10 m/s | -30 to +200 °C |
| WM XA | 20 – 35 mm | ≤ 1.0 MPa | ≤ 10 m/s | -30 to +200 °C |
Limits as printed in our catalog for each model; the real limit depends on the face pair, elastomer and fluid.
Drawings & dimensions
Drawings and dimension tables
Dimensions in mm unless a table says inches. Inch sizes are named by the nominal shaft size in inches; d1 gives the same size in mm. Letters match the section drawing. Standard sizes shown; other sizes are built from a drawing or the old seal.
Catalog model
WM X
- Pressure
- ≤ 1.0 MPa
- Speed
- ≤ 5 m/s
- Temperature
- -30 to +200 °C
- Stationary ring
- SiC, tungsten carbide
- O-ring
- NBR, EPDM, Viton
- Spring
- 304 stainless, 316 stainless
- Tension spring
- 321 stainless
- Stationary seat
- 304 stainless, 316 stainless
- Spring cover
- Bakelite, alumina
- Retainer
- Bakelite, alumina
| Model | d (mm) | d3 | d7 | l1 | l3 |
|---|---|---|---|---|---|
| WMX-20 | 20 | 42.5 | 55.5 | 36.5 | 11.0 |
| WMX-22 | 22 | 47.0 | 45.5 | 32.6 | 9.0 |
| WMX-25 | 25 | 54.0 | 50.5 | 38.6 | 10.0 |
| WMX-28 | 28 | 54.0 | 50.5 | 38.6 | 10.0 |
| WMX-30 | 30 | 54.0 | 50.5 | 38.6 | 10.0 |
| WMX-35 | 35 | 62.0 | 60.5 | 39.8 | 11.0 |
Catalog model
WM XE
- Pressure
- ≤ 1.2 MPa
- Speed
- ≤ 10 m/s
- Temperature
- -30 to +180 °C
- Rotary ring
- Tungsten carbide
- Stationary ring
- Tungsten carbide
- Secondary seals
- NBR, Viton, EPDM
- Spring and metal parts
- 304 stainless, 316 stainless
- Other parts
- Plastic
Main dimensions (mm) as printed on the drawing; other sizes on request
Catalog model
WM XC-35/XC-45
- Pressure
- ≤ 1.0 MPa
- Speed
- ≤ 10 m/s
- Temperature
- -30 to +200 °C
- Rotary ring
- Carbon, SiC, tungsten carbide
- Stationary ring
- Ceramic, SiC, tungsten carbide
- Secondary seals
- NBR, EPDM, Viton
- Spring and metal parts
- 65Mn spring steel, 304 stainless, 316 stainless
- Other parts
- Plastic
Main dimensions (mm) as printed on the drawing; other sizes on request
Catalog model
WM XA
- Pressure
- ≤ 1.0 MPa
- Speed
- ≤ 10 m/s
- Temperature
- -30 to +200 °C
- Rotary ring
- Tungsten carbide
- Stationary ring
- Tungsten carbide
- Secondary seals
- NBR, Viton, EPDM
- Spring and metal parts
- 304 stainless, 316 stainless
- Other parts
- Plastic
| Model | d (mm) | d3 | d6 | d7 | l1 | l3 |
|---|---|---|---|---|---|---|
| WMXA-20 | 20 | 45.2 | \ | 36 | 21.5 | 7.2 |
| WMXA-25 | 25 | 54.0 | 35.2 | 42 | 21.0 | 6.0 |
| WMXA-35 | 35 | 69.8 | 50.3 | 56 | 25.7 | 10.2 |
FAQ
Flygt-Compatible Seal FAQ
Are these genuine Flygt seals?
No — they are OEM-compatible equivalents built to Flygt dimensions at manufacturer-direct pricing. They are not sold as genuine Flygt parts.
Will it fit my pump?
Built to the same cartridge envelope as the original. Send the Flygt seal part number, a drawing or the old seal and we confirm the fit before quoting.
What faces for gritty wastewater?
SiC/SiC for most wastewater, tungsten-carbide (WC/WC) for heavy sludge and sand — both far outlast carbon in abrasive service.
Can you match obsolete Flygt seals?
Yes — we reverse-engineer discontinued models from a sample.
Source Flygt-Compatible Seals At Scale
OEM-compatible, custom-machined and private-label Flygt equivalents built in-house to your spec, at low minimums. Send the seal drawing, the seal model or a sample and we’ll quote.