John Crane-Compatible Mechanical Seals
Drop-in replacement mechanical seals built to John Crane dimensions — matched faces and materials at manufacturer-direct pricing.
Type 1 / 2 / 21 & cartridge equivalents · SiC / Carbon / TC · OEM dimensions · Custom & 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 fit
matched to John Crane envelopes
OEM dimensions
faces, springs and hardware to spec
Cost savings
manufacturer-direct vs OEM pricing
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.
What we supply
Drop-in equivalents across the common John Crane range, OEM-compatible or fully custom.
Single & cartridge equivalents
Drop-in replacements for common John Crane Type 1, 2, 21 and cartridge seals.
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.
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 balanced | Balanced single | Carbon / SiC | Utilities / mild chemical |
| Cartridge | Cartridge equivalent | SiC / SiC | Process pumps |
| Metal bellows | Bellows equivalent | Carbon / SiC | High temperature |
Go deeper: John Crane vs Flowserve · all seal types.
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.