O-Ring 4.47 x 1.78 FFKM 75 Black – PFX8050

Descrizione

O-Ring with dimensions 4.47 x 1.78 mm in PFX8050 FFKM perfluoroelastomer compound.

The technical data below are taken from the supplied NEXA Compound Data Sheet for PFX8050.

Physical and mechanical compound data

• Material designation: FFKM / perfluoroelastomer according to DIN/ISO 1629
• Colour: Black
• Hardness: 75 Shore A (+/- 5)
• Specific gravity: 1.96 g/cm³ (+/- 0.02)
• Modulus 50%: >= 7 MPa; Modulus 100%: >= 13 MPa
• Tensile strength: >= 14 MPa; Elongation at break: >= 150%
• Compression set: <= 22% after 72 h at 200°C; <= 45% after 72 h at 300°C; <= 35% after 336 h at 200°C
• Low-temperature data: TR70 9°C; TR50 6°C; TR30 3°C; TR10 -1°C
• Glass transition: Tg Mid-Point -1°C; Tg On-Set -7°C
• Application temperature range: -10°C / +320°C (14°F / 608°F)

Chemical ageing / application notes

• The datasheet reports fluid immersion in Skydrol LD4 for 72 h at 125°C.
• The datasheet reports water steam ageing for 168 h at 260°C and 300°C.
• The datasheet reports ageing data in Reference Oil 300 for 72 h at 175°C.
• The datasheet reports Aromatic Fuel Resistance (FUEL B) for 72 h at 23°C.
• The datasheet reports dry heat resistance data at several time/temperature points, including 1000 h at 250°C and 275°C.

Certifications / approvals: Compound according to AMS 7257C.