Pump mechanical seals · Manufacturer · Ningbo, China
Mechanical seals, built to spec.
Standard, cartridge, double, metal bellows, split and custom seals, OEM-compatible to the major brands. Send the seal drawing, the seal model or the old seal.
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Seal types we manufacture
Send the seal drawing or model. We build the seal.
These are the core ranges. We also build OEM-compatible and obsolete designs to spec, from the seal drawing, the seal’s part number or a sample of the old seal.
Cartridge seals
Pre-set, pre-assembled single and double cartridges to API 682. Drop-in fit with no field measurement.
View cartridge seals → Barrier / buffer fluidDouble seals
Back-to-back, tandem and face-to-face arrangements with barrier or buffer fluid for hazardous duty.
View double seals → No elastomer secondaryMetal bellows seals
Edge-welded and formed bellows for high-temperature, cryogenic and chemical service.
View bellows seals → Built to OEM dimensionsOEM-compatible seals
Drop-in equivalents for Grundfos, Burgmann, John Crane, Flygt and most other brands.
View OEM-compatible → Type 1 · 2 · 21 and moreStandard component seals
Single and multi-spring seals for general water and industrial pumps.
View single seals → Built from a sampleCustom & split seals
Custom-machined and split seals for obsolete, oversized or hard-to-service pumps.
Request custom →OEM-compatible replacements
Same envelope. Your duty. Manufacturer-direct.
A compatible seal is built to the same shaft, sleeve and gland dimensions as the original, so it drops straight into the pump. We match the face pair, balance and elastomer to your service, and reverse-engineer obsolete patterns from a sample.
Our seals are equivalents built to OEM dimensions. They are not sold as genuine OEM parts.
| Brand | What we build | Link |
|---|---|---|
| Grundfos | Most Grundfos pump seals. Common requests: CR, CRI and CRN. | View → |
| John Crane | Most John Crane seals. Common requests: Type 1, 2 and 21. | View → |
| Burgmann / EagleBurgmann | Most EagleBurgmann pump seals. Common requests: MG1, MG12, MG13. | View → |
| Flowserve | Most Flowserve seals, to API 682 where required. | View → |
| Chesterton | Most Chesterton seals: split, cartridge and component. | View → |
| Flygt | Most Flygt submersible pump seals. | View → |
Also KSB, Wilo, Ebara, Lowara, Pentair, Hayward, AESSEAL, Vulcan, Roten and more. Don’t see your brand? Send the seal drawing, its part number or the old seal.
Solutions by application
Start from the pump and the fluid.
Each application page starts from your industry and pump duty, then points you to the right seal.
Chemical processing
→Corrosive duty. Silicon carbide faces, Viton / FFKM elastomers.
Mining & slurry
→Abrasive slurry duty. Hard-faced, heavy-duty seals.
Power generation
→Boiler-feed and cooling-water pump sealing.
HVAC
→Chilled-water and condenser-water pumps in commercial buildings.
Food & beverage
→Sanitary, hygienic sealing for process and transfer pumps.
Pharmaceutical
→Clean-room and high-purity pump sealing.
Submersible & wastewater
→Double seals for Flygt, Grundfos, Tsurumi and most sewage and drainage pumps.
Swimming pool
→Shaft seals for Hayward, Pentair, Jacuzzi and most pool pumps.
Hot tub & spa
→Heat-rated shaft seals for Waterway, Balboa, Aqua-Flo and most spa pumps.
How an order works
From a seal drawing to a drop-in replacement.
Send the seal drawing, model or sample
A drawing of the seal, its model or OEM part number, or a sample of the old seal for us to measure.
We confirm and quote
We confirm the fit, faces and materials for your duty, then quote.
We machine, inspect and ship
Built in-house and shipped under our brand, or under yours.
Manufacturing capabilities
A manufacturer, not a middleman.
- Machining
- In-house CNC turning and grinding for faces, sleeves, glands and hardware.
- Faces
- Silicon carbide, tungsten carbide, carbon, alumina.
- Elastomers
- FFKM, FKM, EPDM, PTFE.
- Standards
- API 682, ISO 3069, EN 12756, DIN 24960 where the spec requires.
- Orders
- Low minimums: quantities that work for a distributor or a single maintenance order.
- Programs
- Private label, build-to-print and ODM →
From the blog
Notes from the seal shop.
Failure analysis, selection and installation, written for the people who keep pumps running.
Request a quote
Send the seal drawing, the model or the old seal.
As the manufacturer we quote OEM-compatible, custom and private-label seals at low minimums.