Single & cartridge equivalents
Drop-in replacements for common John Crane Type 1, 2, 21 and cartridge seals.
John Crane-Compatible Mechanical Seals
Drop-in replacement mechanical seals built to John Crane dimensions — matched faces and materials at manufacturer-direct pricing.
We build most John Crane seals, not only the types named on this page. Send the seal part number, a drawing or the old seal.
At a glance
- 01Common requests: Type 1 / 2 / 21 & cartridge
- 02SiC / Carbon / TC
- 03OEM dimensions
- 04Custom & 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 fitmatched to John Crane envelopes
OEM dimensionsfaces, springs and hardware to spec
Cost savingsmanufacturer-direct vs OEM pricing
Selection
Why a John Crane-compatible seal
- Same fit, lower cost
Built to John Crane dimensions so it drops into the same pump, at manufacturer-direct pricing.
- Faster availability
No long OEM lead times; we machine to the pattern in-house.
- Matched materials
The face pair and elastomer are specified to the duty, not down-specced to hit a price.
- Obsolete patterns covered
Discontinued John Crane seals reverse-engineered from a sample.
See how the major brands compare in our John Crane vs Flowserve breakdown.
Range
What we supply
Drop-in equivalents across the common John Crane range, OEM-compatible or fully custom.
Bellows & double equivalents
Metal bellows and double-seal equivalents for high-temperature and hazardous duty.
Custom & obsolete
Discontinued or non-standard John Crane patterns machined from a drawing or sample.
Selection guide
Match the replacement to your John Crane seal
Send the part number, a drawing or the old seal and we confirm the equivalent. The table is a starting point.
| Original style | Equivalent | Face pair | Typical duty |
|---|---|---|---|
| Type 1 / 2 component | Single equivalent | Carbon / Ceramic | Clean water |
| Type 21 | Single equivalent | Carbon / SiC | Utilities / mild chemical |
| Cartridge | Cartridge equivalent | SiC / SiC | Process pumps |
| Metal bellows | Bellows equivalent | Carbon / SiC | High temperature |
OEM-compatible equivalents built to the original envelope — not sold as genuine John Crane parts.
Go deeper: John Crane vs Flowserve · all seal types.
From our catalog
John Crane styles with drawings and dimensions
Catalog models built to John Crane styles. Each usually corresponds to the John Crane type named; check the working length against the old seal or its drawing before ordering.
FAQ
John Crane-Compatible Seal FAQ
Are these genuine John Crane seals?
No — they are OEM-compatible equivalents built to John Crane dimensions and specifications at manufacturer-direct pricing. They are not sold as genuine John Crane parts.
Will it fit my pump exactly?
Built to the same envelope as the original. Send the John Crane part number, a drawing or the old seal and we confirm the fit before quoting.
Can you match obsolete John Crane seals?
Yes — we reverse-engineer discontinued patterns 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 John Crane-Compatible Seals At Scale
OEM-compatible, custom-machined and private-label John Crane equivalents built in-house to your spec, at low minimums. Send a part number, a drawing or a sample and we’ll quote.