Single Mechanical Seals
The workhorse seal for standard pump duties — balanced and unbalanced designs for water, cooling and general industrial service.
Product images coming soon — request samples or the full catalog for photos.
Why Single Mechanical Seals
The workhorse seal for standard pump duties — balanced and unbalanced designs for water, cooling and general industrial service.
- Model cross-reference: send your pump brand/model or old seal part number — we confirm the fit before you order
- Seal faces: SiC/SiC, SiC/TC, ceramic/carbon — matched to your media, not sold by price
- Elastomers: EPDM, FKM (Viton), NBR, PTFE with chemical compatibility guidance
- Standard shaft sizes 6-120 mm, metric and inch; cartridge and component options
- Factory-direct pricing from the Ningbo seal cluster — 1 piece to container loads
- Honest duty guidance: real pressure/temperature windows, no overpromising
How Single Mechanical Seals Work
A mechanical seal keeps pumped media inside the pump where the shaft passes through the casing. Two precision-lapped faces — one rotating with the shaft, one stationary — ride on a microscopic fluid film that seals while allowing rotation.
Selection Basics
You need four numbers: shaft diameter, seal bore, operating pressure and temperature — plus your media. With those, we match configuration, face material and elastomer. Send them and we do the rest.
What We Do Differently
No fake "never-leak" promises. We tell you which seal fits your duty window, how to install it right, and what shortens seal life — honesty that keeps your pumps running longer.
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FAQ
Questions Buyers Ask
How do I know which single mechanical seal fits my pump?
Send us your pump brand/model or the old seal part number with shaft diameter and bore size. We cross-reference standard sizes and confirm the fit before you order — no guesswork.
What is your lead time?
Standard sizes ship in 7-15 days. Custom or non-standard sizes are quoted individually after drawing or sample confirmation.
Can I order a single piece as a sample?
Yes — sample orders of 1-10 pieces are welcome at factory-direct prices so you can verify fit and quality first.
Do you support OEM / custom production?
Yes — custom sizes, materials and designs from drawing or sample, with prototype → sampling → mass production workflow.