Confused by all the sealing terms out there? Whether you’re sourcing parts or managing inventory, understanding seal terminology is key.
This glossary breaks down the most common terms, materials, size codes, and standards in industrial sealing. Bookmark it — your sealing cheat sheet starts here.
From O-rings and oil seals to PTFE backups and radial lips, this guide explains it all — clearly, quickly, and from a supplier’s perspective.
Common Seal Types
| شرط | وصف | Learn More |
|---|---|---|
| حلقة مطاطية | Circular elastomer seal used in static/dynamic applications | O-Ring Basics |
| ختم الزيت | Lip seal that retains oil in shafts | Oil Seal Guide |
| Rotary Seal | Designed for rotating shafts and dynamic applications | ختم العمود الدوار |
| ختم هيدروليكي | High-pressure seal in hydraulic cylinders and pumps | دليل الختم الهيدروليكي |
| Dust/Wiper Seal | Protects from contamination in pneumatic/hydraulic systems | Dust Seal Use |
Seal Material Glossary
| مادة | ملكيات | الاستخدام المثالي |
|---|---|---|
| NBR (نتريل) | Oil resistant, cost-effective | General hydraulic & fuel |
| FKM (فيتون®) | High temperature & chemical resistant | Automotive, aerospace |
| الإيثيلين بروبيلين دي إم | Excellent weather/ozone resistance | Outdoor, brake fluids |
| سيليكون | Flexible, FDA-grade options | Food, pharma, dry heat |
| مادة البولي تترافلورو إيثيلين | Chemically inert, extreme temp | Aggressive chemicals, steam |
➡️ See comparisons in our EPDM vs FKM Guide
Seal Size & Identification Terms
| شرط | Meaning |
|---|---|
| القطر الداخلي (ID) | Inside diameter of the seal ring |
| OD (القطر الخارجي) | Outside diameter, often matches housing bore |
| CS (Cross Section) | Thickness of the ring |
| TC / SC / TG4 | Common oil seal types based on lip and case design |
| AS568 | Inch O-ring sizing standard |
| DIN 3771 | Metric O-ring sizing standard |
Need help with sizing? Use our Seal Size Cross Reference.
Popular Standards & Certifications
| معيار | What It Covers |
|---|---|
| AS568 | US inch O-ring sizes |
| DIN 3760 | Oil seal standards |
| ISO 3601 | O-ring tolerances and sizes |
| FDA 21 CFR 177.2600 | Food-grade elastomers |
| RoHS / REACH | Environmental compliance |
| TS16949 / ISO9001 | Quality system certifications for OEMs |
We manufacture seals in compliance with all above standards upon request — custom specs available.
Bulk Sealing Terminology
| شرط | وصف |
|---|---|
| Bulk rubber seal | Large quantities of generic or customized seals for inventory stocking |
| OEM seal | Seal manufactured according to original equipment specs |
| Custom molded seal | Made from client-provided drawings or samples |
| طقم الختم | Pre-packaged seals by type, size, or application |
| Oring assortment | Mixed-size boxes for maintenance or repair use |
➡️ Explore our دليل مجموعة تشكيلة حلقات O أو Automotive Kits
خاتمة
Understanding sealing terminology makes you a smarter buyer, engineer, and operator. Use this glossary to eliminate confusion and improve your seal selection confidence.
نداء للعمل
Need help decoding your seal specs or choosing the right material? Send us your part number, drawing, or photo — we’ll identify and quote fast.
- بريد إلكتروني:[email protected]
- واتساب: +86 17622979498
We simplify sealing — from bulk orders to custom solutions.
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