What is the John Crane Type 1 equivalent?

The Type 1 is a rubber-bellows (elastomer bellows) single mechanical seal. Matched equivalents are Burgmann MG1/MG12, Flowserve PAC-Seal 21/190, AESSEAL rubber-bellows series, Chesterton 110 and similar China-built alternatives — all to the same shaft and gland envelope.

What size range does the Type 1 cover?

Shaft diameter 0.5–3.5 in (12.7–88.9 mm), pressure up to 29 bar (425 psi), temperature −40 to 205 °C depending on elastomer. Built to DIN 24960 / ISO 3069 dimensions.

Is the equivalent identical to the OEM part?

No. It is matched by size and function, not a genuine John Crane part. For critical service confirm face material and elastomer with the supplying factory before ordering.

John Crane Type 1 Equivalent — China Rubber-Bellows Mechanical Seal

At a glance

Attribute	John Crane Type 1 (typical)
Seal type	Rubber-bellows (elastomer bellows), single, non-pusher
Shaft diameter	0.5–3.5 in (12.7–88.9 mm)
Pressure	Up to 29 bar (425 psi)
Temperature	−40 to 205 °C (by elastomer grade)
Standard	DIN 24960 / ISO 3069 envelope
Face / elastomer	Carbon / SiC / TC · NBR, EPDM, FKM (Viton)
Hardware	304 / 316 stainless steel
Typical duty	Water, wastewater, light chemical, pulp & paper, food (general service)

Matched equivalent options we source

Burgmann

MG1 / MG12

Rubber-bellows single seal, same envelope as Type 1. The most common cross-brand match.

Flowserve / PAC-Seal

21 / 190

PAC-Seal rubber-bellows equivalents to the Type 1 envelope.

AESSEAL

Rubber-bellows series

AESSEAL's bellows single seals built to the same gland dimensions.

Chesterton

110

Chesterton 110 single rubber-bellows seal, functional equivalent.

Exact China model confirmed by the supplying factory AE after you send shaft Ø + elastomer + medium. We translate the OEM number; we don't invent a model.

Materials we can specify

Rotary faceCarbon graphite, Silicon Carbide (SiC), Tungsten Carbide (TC)

SeatCeramic, SiC, TC — matched to abrasiveness

ElastomerNBR (oil), EPDM (hot water/steam), FKM (acids/solvents)

Hardware304 / 316 SS; duplex or Hastelloy on request

Is the Type 1 equivalent the same as the genuine John Crane part?

No. It is matched by size and function to the OEM envelope, sourced from an ISO 9001-certified partner plant through our coordination. It is not a genuine John Crane seal and is not sold as one.

Why choose a rubber-bellows seal?

The bellows is both the secondary seal and the drive — it tolerates shaft run-out, end-play and fibrous/abrasive media far better than pusher O-ring designs, which can "hang up" on solids.

Lead time and minimum?

Made-to-order; typical 4–6 weeks to NA/EU (production + air freight). Small-batch / trial quantities are OK; exact lead time confirmed per inquiry. We do not claim standing stock.

Equivalent, not identical. Listed equivalents are matched by size and function to the OEM part and sourced from ISO 9001-certified partner plants via our coordination — PlatGlobe is a sourcing coordinator, not the original manufacturer. For pressure / temperature / chemical-critical service, confirm the exact compound and dimensions with the supplying factory before ordering. Lead time and availability are confirmed per inquiry.

Need a Type 1 equivalent?

Send shaft Ø + elastomer + medium (or a photo of the old seal) — we return the matched model and quote.

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John Crane Type 1 Equivalent