FPM O-Ring 42,5x3,55 - High-Performance Fluoro Seal

Technical Specifications of the FPM O-Ring 42,5x3,55

Overview
The FPM O-Ring 42,5x3,55 (inner diameter 42.5 mm, cross-section 3.55 mm) is a high-end fluoroelastomer sealing ring. Made from FPM (also known as FKM or fluor rubber), it is engineered for demanding applications where resistance to aggressive chemicals, high temperatures, fuels, oils, and aging is essential. This version is positioned as a specialist variant in your simmering.pl catalogue, so as not to cannibalize other packaging variants.

Key Technical Specifications

• Inner diameter (ID): 42.50 mm

• Cross-section (CS): 3.55 mm

• Material: FPM / fluor elastomer (commonly branded as Viton® / FKM)

• Typical Temperature Range: approx. -20 °C to +200 °C (depending on specific fluoro compound)

• Chemical Resistance: excellent resistance to mineral oils, fuels, aromatics, solvents, acids, weak alkalis, and many aggressive media

• Mechanical Properties: high aging resistance, low compression set, excellent resilience

• Standards & Tolerances: produced under O-ring dimensional tolerances (DIN/ISO metric series)

• Color / Appearance: typically dark brown, black or brownish depending on batch/compound

Performance & Benefits

• Outstanding chemical resistance - ideal for uses with fuels, solvents, aggressive fluids

• Wide temperature stability, retaining sealing properties in extreme conditions

• Low long-term deformation, high dimensional stability under load

• Long service life even in harsh environments

• Ideal as a complement in product catalog - distinct variant, not competing with bulk packs

• Strong positioning for niche, high-spec applications

Use Cases / Applications
This FPM O-Ring 42,5x3,55 is suitable for:

• Sealing in chemical process equipment and reactors

• Fuel system connections, dosing pumps, injection systems

• High-temperature applications, e.g. heating, steam, ovens

• Aggressive environments, e.g. solvents, acids, catalysts

• Industrial machinery, hydraulics with aggressive fluids

• Automotive and aerospace fluid systems

Installation & Recommendations

1. Ensure the groove / gland is precisely sized for 42,5 x 3,55 mm O-rings.

2. Clean mating surfaces and eliminate sharp edges or burrs prior to installation.

3. Use compatible lubricant (fluorosafe grease) to ease fitment without damaging fluor elastomer.

4. Avoid over-stretching beyond recommended elongation limits.

5. Shield from ozone, UV, or strong oxidizing agents beyond material’s resistance.

FAQ (Frequently Asked Questions)

Q: What does “FPM 42,5x3,55” mean?
A: It signifies an O-ring with inner diameter of 42.5 mm and cross-section 3.55 mm made from fluoro elastomer (FPM / FKM).

Q: Why choose an FPM O-ring over NBR or EPDM?
A: FPM (fluor rubber) offers far superior chemical resistance, thermal stability, and aging performance compared to NBR or EPDM in demanding environments.

Q: What temperature range can it withstand?
A: Typically from -20 °C up to +200 °C, though exact limits depend on compound and operating conditions.

Q: Is this O-ring suitable for dynamic (rotary) sealing?
A: Yes, for moderate speeds and correct lubrication. For high-speed rotary seals, specialized designs or materials may be more appropriate.

Q: Do you offer this O-ring in bulk packs or alternate packaging?
A: This listing is for the specific variant “FPM O-Ring 42,5x3,55.” Other packaging options exist in our catalog and are handled in separate product entries, avoiding internal competition.

Q: How fast is delivery?
A: We dispatch from 📍 Warehouse & Store: Lublin, ul. Smoluchowskiego 1, building 4. 🚚 24h shipping - fast and efficient order processing for business customers.

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