PFA-FKM TF75BK50 O-Ring, Size: -020
Material: PFA-FKM TF75BK50 O-Ring
Size: AS568 -020 O-Ring
Part Number: TF75BK50-OR-020
TF75BK50
Teflon® PFA Encapsulated FKM
75
Shore A
Encapsulated
FKM Core
Color: Black
Detailed Description
TF75BK50-OR-020 is a Black, 75 Shore A, Teflon® PFA Encapsulated FKM O-Ring, a FKM Core product. It is a 75 durometer Teflon® PFA Encapsulated FKM. TF75BK50 is manufactured with the following features & specifications: Encapsulated. TF75BK50-OR-020 is AS568 size -020 O-Ring also referred to as 1.78mm (Cross Sectional Diameter (CS)) x 21.95mm (Inside Diameter (ID)).
Material: 75 Durometer PFA-FKM TF75BK50 O-Ring
Size: AS568 -020, 1.78mm CS X 21.95mm ID (0.070" CS X 0.864" ID)
| Technical Specification | Value |
|---|---|
| Compound Number | TF75BK50 |
| Material | Teflon® PFA Encapsulated FKM |
| Subtype | FKM Core |
| Color | Black |
| Durometer | 75 Shore A Hardness |
| High Temperature | 205 °C / 401 °F |
| Low Temperature | -26 °C / -15 °F |
| Geometry Specifications | |
| Cross Sectional Geometry | O-Ring |
| Size Standard | AS568 |
| Size | -020 |
| Cross Section (CS) | 1.78 mm / 0.070 in |
| Inside Diameter (ID) | 21.95 mm / 0.864 in |
| Other Specifications | |
Encapsulated | |
TF75BK50 is a 75 shore A black PFA encapsulated FKM compound designed for sealing applications requiring extreme chemical resistance with reliable elastomeric performance. The PFA Teflon outer shell provides near universal chemical compatibility, making it ideal for O-rings and gaskets exposed to aggressive acids, solvents, and process media, while the FKM core delivers resilience and recovery for effective sealing. This material is well suited for pharmaceutical, food processing, and chemical handling systems, with compliance to FDA 21 CFR 177.1550, USP Class VI, and 3A 20-17 standards. With a service temperature range of -26°C to 205°C, TF75BK50 meets ASTM D2000 requirements and offers dependable performance in demanding environments.
PFA encapsulated FKM materials combine the chemical inertness of fluoropolymers with the flexibility of elastomer cores to create high performance sealing solutions. The PFA outer layer resists a wide range of aggressive chemicals, while the FKM core maintains sealing force and compression recovery in O-rings and gaskets. These materials are commonly used in pharmaceutical, semiconductor, and chemical processing industries where contamination control and chemical resistance are critical. While highly effective in harsh chemical environments, encapsulated seals are typically best suited for static applications due to reduced abrasion resistance compared to solid elastomers.
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