What is the Burgmann M7N equivalent?

The M7N is a wave-spring pusher single seal (unbalanced). Matched equivalents are John Crane Type 8-1 / 8B1, Flowserve 140 / 155, Chesterton 491 and similar China-built alternatives — all pusher-type single seals to the same envelope.

What size range does the M7N cover?

Shaft diameter 14–100 mm (M74 variant to 200 mm), pressure up to 25 bar, temperature −30 to 220 °C. Built to DIN 24960 / EN 12756.

Is the equivalent identical to the OEM part?

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

Burgmann M7N Equivalent — China Wave-Spring Pusher Mechanical Seal

At a glance

Attribute	Burgmann M7N (typical)
Seal type	Wave-spring pusher, single, unbalanced
Shaft diameter	14–100 mm (M74: to 200 mm)
Pressure	Up to 25 bar (363 psi)
Temperature	−30 to 220 °C (EagleBurgmann range −50 to 220 °C)
Standard	DIN 24960 / EN 12756
Face / elastomer	SiC / SiC, Carbon / SiC · EPDM, FKM, FFKM
Hardware	CrNiMo steel (304/316), duplex on request
Typical duty	Process, chemical, pulp & paper, water/wastewater, lube oils

Matched equivalent options we source

John Crane

Type 8-1 / 8B1

Multi-spring pusher single seal — functional equivalent to the M7N envelope.

Flowserve

140 / 155

Flowserve multi-spring pusher equivalents to the M7N class.

Chesterton

491 / 491HT

Chesterton pusher single seals, functional equivalent.

AESSEAL

Multi-spring series

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

Note: the M7N uses a wave spring; JC Type 8-1 / Flowserve 140 use multi-springs — both are pusher-type single seals and function-equivalent by envelope. Exact China model confirmed by the supplying factory AE after you send shaft Ø + elastomer + medium.

Materials we can specify

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

SeatG9 carbon-graphite, G4 / G6 / G13 SiC — by medium

ElastomerEPDM, FKM (Viton), FFKM (Kalrez-equivalent), Aflas

Hardware304 / 316 SS, duplex, Hastelloy C on request

Is the M7N equivalent the same as the genuine EagleBurgmann 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 EagleBurgmann seal and is not sold as one.

When is a balanced seal needed instead?

Above ~10–15 bar seal-chamber pressure, or for poor-lubrication fluids (light hydrocarbons, hot water), a balanced design reduces face heat. Tell us the duty and the factory AE will recommend balanced vs unbalanced.

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 an M7N equivalent?

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

Start a cross-reference

Burgmann M7N Equivalent