High quality cylinder seal rings for hydraulic & pneumatic systems. OEM seal ring manufacturer offering custom sizes, durable materials & reliable sealing performance.
Cylinder seal rings are critical sealing components designed to prevent fluid or gas leakage within hydraulic and pneumatic cylinders, ensuring reliable performance and extended service life of the system. They form a tight barrier between the cylinder body and moving parts such as pistons and rods, maintaining internal pressure and preventing contamination.
These seal rings can be manufactured in different materials (e.g., NBR, FKM, PTFE) and profiles to match specific operating pressures, speeds, and temperature requirements of industrial equipment.
Designed to seal high pressure fluids and prevent internal leak paths in hydraulic and pneumatic actuators.
Optimized cross-section geometry delivers superior sealing under both static and dynamic motion.
Elastomeric seals like NBR (nitrile rubber) offer good wear resistance and broad chemical compatibility.
PTFE and FKM (fluoro-rubber) options available for high temperature, high pressure or specialty media.
Support for custom sizes and shapes based on CAD drawings or technical specs.
Tight tolerance machining ensures proper fit and long service life.
Resistant to wear, extrusion and harsh environments.
Suitable for heavy-duty industrial machinery, construction equipment, and automation systems.
Cylinder seal rings are widely used across many sectors, including:
Hydraulic cylinders for excavators, presses and industrial machinery
Pneumatic actuators in automation and robotics
Mobile hydraulic equipment – loaders, cranes
Oil & gas fluid power systems
Agricultural and mining machinery
Their main role is to contain working fluid and maintain pressure integrity under dynamic loads and cycling conditions.
Below are common types of seal rings often required by buyers:
Hydraulic seal rings – used for high-pressure fluid applications
Pneumatic seal rings – used for compressed air systems
Wear rings / guide rings – to prevent metal-to-metal contact and guide moving shafts
Back-up rings – support elastomeric seals at high pressures
O-rings & multiple lip seals – versatile sealing for static and dynamic joints
Each variant is selected based on pressure rating, temperature range, motion type, and material compatibility.
| Material | Characteristics |
|---|---|
| NBR (Nitrile Rubber) | Excellent for general hydraulic sealing, good oil resistance; cost-effective. |
| FKM (Fluoro-rubber) | High temperature and chemical resistance. |
| PTFE (Teflon) | Low friction, high wear resistance and broad fluid compatibility. |
| Wear / Guide Ring Materials | Reduce friction and guide piston/rod movement. |
Professional OEM Seal Supplier – direct factory pricing.
Custom Solutions – from prototype to large orders.
Engineering Support – material & design selection.
Quality Assurance – tested for pressure rating and durability.
Global Export Readiness – packaging & documentation for international logistics.
Submit your drawing or requirements (CAD, STEP, PDF)
Technical review and quotation
Prototype and approval
Production and quality inspection
Delivery and documentation
No. 7, inside No. 345, Linfu West Street, Yingdong Village, Beian Sub-district Office, Jimo District, Qingdao City, Shandong Province
