{"id":209,"date":"2026-02-21T21:01:10","date_gmt":"2026-02-21T21:01:10","guid":{"rendered":"https:\/\/systemseals.orangesprocket.com\/?post_type=product&p=209"},"modified":"2026-03-17T21:00:11","modified_gmt":"2026-03-17T21:00:11","slug":"439-series-rotary-seal","status":"publish","type":"product","link":"https:\/\/www.systemseals.com\/en\/products\/439-series-rotary-seal\/","title":{"rendered":"439 Rotary Seal"},"content":{"rendered":"
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439 Series<\/p>\r\n <\/div>\r\n

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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.<\/h3>\n <\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n<\/section>\r\n
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Installation Drawing <\/h2>\r\n <\/div>\r\n
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Material Ranges <\/h2>\r\n <\/div>\r\n
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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.<\/p>\n <\/div>\r\n \r\n \r\n \r\n \r\n
NBR fabric \/ garter spring<\/td>\r\n MN139<\/td>\r\n <\/tr>\r\n
HNBR fabric \/ garter spring<\/td>\r\n MN145<\/td>\r\n <\/tr>\r\n
FKM or FPM \/ fabric \/ garter spring<\/td>\r\n MF24<\/td>\r\n <\/tr>\r\n <\/table>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n\r\n \r\n \r\n
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Temperature Ranges <\/h2>\r\n <\/div>\r\n
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MN139<\/div>\r\n <\/div>\r\n
\u00b0C<\/div>\r\n
\u00b0F<\/div>\r\n <\/div>\r\n
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hydraulic oil<\/div>\r\n
-30\u2026+100<\/div>\r\n <\/div>\r\n
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hydraulic oil<\/div>\r\n
-22\u2026+212<\/div>\r\n <\/div>\r\n
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water oil emulsions (HFA<\/div>\r\n
+5\u2026+60<\/div>\r\n <\/div>\r\n
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water oil emulsions (HFA<\/div>\r\n
+41\u2026+140<\/div>\r\n <\/div>\r\n
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water-glycol fluids (HFC)<\/div>\r\n
-30\u2026+60<\/div>\r\n <\/div>\r\n
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water-glycol fluids (HFC)<\/div>\r\n
-22\u2026+140<\/div>\r\n <\/div>\r\n
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polyol esters (HFD)<\/div>\r\n
-30\u2026+80<\/div>\r\n <\/div>\r\n
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polyol esters (HFD)<\/div>\r\n
-22\u2026+176<\/div>\r\n <\/div>\r\n
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water<\/div>\r\n
+5\u2026+100<\/div>\r\n <\/div>\r\n
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water<\/div>\r\n
+41\u2026+212<\/div>\r\n <\/div>\r\n
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Speed<\/div>\r\n
15 m\/s (50 ft\/sec)<\/div>\r\n <\/div>\r\n
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Speed<\/div>\r\n
15 m\/s (50 ft\/sec)<\/div>\r\n <\/div>\r\n
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Pressure<\/div>\r\n
7.25 bar(105 psi)<\/div>\r\n <\/div>\r\n
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Pressure<\/div>\r\n
7.25 bar(105 psi)<\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n\r\n