Image shown is representative and may differ from the actual product in size, proportions, and color shade
4.500 in
(114.30 mm)
6.880 in
(174.75 mm)
1/2"
FFKM Kalrez 4079 Ring Gasket, Size: 150#-4"-RN-1/2"
Material: FFKM Kalrez 4079 Ring Gasket
Size: 150#-4"-RN-1/2" Ring Gasket
Part Number: KP4079-150#-4"-RN-1/2"
Kalrez® (Dupont)
4079
FFKM (Perfluoroelastomer)
75
Shore A
Color: Black
Detailed Description
KP4079-150#-4"-RN-1/2" is a Black, 75 Shore A, FFKM (Perfluoroelastomer) Ring Gasket made from Kalrez® (Dupont). It is a 75 durometer FFKM (Perfluoroelastomer). [ KP4079-150#-4"-RN-1/2" is size 150#-4"-RN-1/2" Ring Gasket also referred to as 4 (Pipe Size) x 114.3mm (ID) x 174.75mm (OD) x 1/2" (Thickness). KP4079-150#-4"-RN-1/2" is a size 4, 150#-RN ASME Ring Gasket. Material: 75 Durometer FFKM Kalrez 4079 Ring Gasket Size: 150#-4"-RN-1/2", 4 Pipe Size X 114.3mm ID X 174.75mm OD X 1/2" Thickness
| Technical Specification | Value |
|---|---|
| Compound Number | KP4079 |
| Brand | Kalrez® (Dupont) |
| Material | FFKM (Perfluoroelastomer) |
| Color | Black |
| Durometer | 75 Shore A Hardness |
| High Temperature | 316 °C / 601 °F |
| Low Temperature | -19 °C / -2 °F |
| Geometry Specifications | |
| Type | Ring Gasket |
| Size | 150#-4"-RN-1/2" |
| Pipe Size | 4 |
| ID | 114.30 mm / 4.500 in |
| OD | 174.75 mm / 6.880 in |
| Thickness | 1/2" |
DuPont™ Kalrez® 4079 (KP4079) is a 75 Shore A black perfluoroelastomer (FFKM) designed as a true general-purpose sealing material for chemically aggressive, high-temperature environments. Carbon black filled for improved mechanical strength, it offers excellent resistance to a wide range of organic and inorganic chemicals, including acids, alkalis, oils, solvents, alcohols, esters, ketones, and ethers, while maintaining low and stable compression set at elevated temperatures. Kalrez® 4079 has a maximum continuous service temperature of 315°C (599°F), with short excursions to higher temperatures possible, and demonstrates outstanding hot air aging and resistance to thermal cycling. Its relatively low modulus also aids installation and assembly compared to higher-stiffness FFKM grades.
Kalrez® 4079 is widely used for O-rings, gaskets, diaphragms, seals, and custom molded parts across chemical processing, semiconductor support systems, aerospace, and general industrial applications, covering the majority of non-steam FFKM use cases. It is not recommended for hot water or steam service, high-temperature aliphatic amines, or exposure to ethylene oxide or propylene oxide. For applications requiring steam or amine resistance, other FFKM grades are typically selected. Canyon Components offers equivalent general-purpose FFKM materials engineered to match the chemical resistance, thermal stability, and mechanical performance profile of Kalrez® 4079.
Common relevant keywords:
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