The 439 Series Rotary Seal is a popular seal used in moderate- to high-speed applications that require maximum reliability and long service life. The unique encapsulated spring ensures that the spring remains in place during a blind installation. The main body is strong yet flexible for ease of installation and stability within the groove. The lip force is optimized for the full range of sizes by varying designs of the internal spring, allowing low friction and minimal wear.
Lip force is optimized for a range of sizes by varying designs of the internal spring
Works in a wide range of temperatures
Excellent fluid compatibility
Exceptional abrasion resistance
Available in diameters up to 2100 mm
The 439 series rotary seal features high-grade NBR reinforced with elastomer and fabric heel. To suit a variety of applications, the series is also available in higher temperature HNBR and FPM compounds.
|NBR fabric / garter spring||MN139|
|HNBR fabric / garter spring||MN145|
|FKM or FPM / fabric / garter spring||MF24|
|water oil emulsions (HFA)||+5…+60||+41…+140|
|water-glycol fluids (HFC)||-30…+60||-22…+140|
|polyol esters (HFD)||-30…+80||-22…+176|
|Speed||15 m/s (50 ft/sec)|
|Pressure||7.25 bar(105 psi)|
Note: for other materials or fluids please contact our engineering department.