Precision O-Ring 633.48 x 5.33 mm FPM - High-Performance Fluoroelastomer Seal

Applications

This precision O-ring is engineered for robust industrial sealing tasks in demanding hydraulic, pneumatic and chemical systems. Made from fluoroelastomer (FPM/FKM), it is ideally suited for aggressive media, fuels, oils, hydraulic fluids and industrial gases. Its large nominal inner diameter of 633.48 mm and cross-section thickness of 5.33 mm enable deployment in major flanges, large valve housings and high-flow pipe systems. It delivers reliable static sealing performance in oil & gas production, chemical process plants, food-grade equipment (where approved) and high-pressure hydraulic modules.

Advantages

Thanks to the FPM material (also known under FKM/Viton®), this O-ring offers exceptional chemical resistance, high temperature tolerance and long service life. FPM fluoroelastomers endure continuous use up to +200 °C (and higher in specialised grades) and resist a wide array of oils, fuels, solvents and aggressive fluids. Their superb resistance to ageing, ozone and weathering means the rubber gasket remains stable in static seal applications over long maintenance intervals. The generous cross-section and precise machining minimise extrusion risk and provide secure sealing in flange grooves and large diameter housings. Moreover, the size specification 633.48 x 5.33 mm meets DIN/ISO and BS standard sizing conventions, simplifying integration into custom sealing systems.

Technical Data

• Inner diameter (ID): 633.48 mm

• Cross-section/thickness: 5.33 mm

• Material: Fluoroelastomer FPM/FKM (fluorocarbon rubber)

• Shore hardness: typical variants 75-90 ShA (depending on grade)

• Operating temperature range: approx. -20 °C to +200 °C for standard FPM grades (higher for speciality fluoroelastomers)

• Excellent resistance: hydrocarbons, oils, greases, fuels, many solvents. Note: limited service in hot water/steam or strong polar solvents like ketones.

• Typical use case: static sealing applications, flanged joints, large diameter housings in industrial systems.

Main description:

The **O‑Ring 633.48 x 5.33 mm FPM is a premium industrial sealing component designed for high-performance systems where reliability, durability and chemical stability are mandatory. As a large-diameter rubber seal manufactured from fluoroelastomer (FPM/FKM/Viton®), it provides exceptional protection in demanding environments. Whether your application involves hydraulic manifolds, pneumatic chambers, chemical reactors or large-scale valve systems, this rubber gasket (oring) ensures robust sealing of static joints and cylinder interfaces.

The oversized diameter of 633.48 mm combined with a cross-section of 5.33 mm addresses requirements for hefty grooves and flange faces typical in heavy-duty industrial equipment. With fluoroelastomer material, the sealing ring resists compression set, chemical attack and thermal degradation — crucial for long-term stability of your sealing system. This product addresses the needs of engineers specifying high-durability seals, procurement managers seeking reliable stocking solutions and maintenance teams looking to reduce downtime through fewer replacements.

In practical terms, the ring offers a high-performance rubber seal that can serve as a static seal, O-ring retainer or large-diameter flange gasket in industrial sealing configurations. By selecting this component, you leverage the known advantages of FPM material: wide temperature tolerance, strong chemical resistance and long operational lifespan. Integration is simplified thanks to the standardised sizing (633.48 x 5.33 mm) and compatibility with ISO/DIN standard grooves. The result is a technical sealing component that delivers on both performance and cost-efficiency.

Stocked at our warehouse in Lublin, ul. Smoluchowskiego 1, building 4, this product supports your industrial projects by offering flexible quantity supply, fast dispatch and reliable delivery. With 24 h dispatch capability, you benefit from minimal lead-time and a smooth supply chain for critical parts such as seals, orings, sealing rings and industrial rubber gaskets.

Buyers in hydraulics & pneumatics, chemical processing, heavy-duty machinery and mobile equipment will appreciate the high-end specification of this O-ring. As a static seal element with proven material credentials, it complements your portfolio of technical sealing parts and reinforces system integrity where you cannot afford failure.

FAQ:

1. What makes FPM different from NBR or EPDM for O-rings?
   Fluoroelastomer FPM (also known as FKM/Viton®) is significantly more resistant to high temperatures and aggressive chemicals compared to NBR or EPDM. It maintains elasticity and sealing integrity in environments where standard rubber seals degrade quickly.

2. Is the size 633.48 x 5.33 mm standard?
   Yes - this dimension corresponds to standard metric sizing conventions (ID 633.48 mm, cross-section 5.33 mm). It fits large-diameter applications and allows drop-in replacement where compatible groove geometry exists.

3. Can this sealing ring be used in dynamic applications (moving parts)?
   While the primary design is for static sealing (flanges, housings, large diameter faces), with appropriate groove design and lubrication it may be applied in low-movement interfaces. For high-dynamic or reciprocating use, consider a specification validated for dynamic conditions.

4. What temperature limits apply for an FPM O-ring?
   Standard FPM seals remain effective from approximately -20 °C up to +200 °C. In specialty fluoro-elastomer grades, temperature capability may extend beyond +200 °C, but those should be specified separately.

5. What industrial sectors use this type of large-diameter FPM O-ring?
   Common sectors include chemical processing, oil & gas, valves and pumps, hydraulic power units, large-scale pneumatics and process equipment. The combination of size and high-performance material makes it ideal for major industrial sealing applications.