double lips silicone rubber oil seals

Double lips silicone rubber oil seals.The majority of the cost for a rear main seal replacement is in the labor involved to remove the engine and transmission from your vehicle.  Often times once you’ve paid for that kind of labor, you could have afforded to replace the entire motor, or even your entire car.
The other option is to try and get a second opinion on your leaking rear main seal to see if there is a way to fix the problem without the high price tag.  The guaranteed permanent solution is to add 1 8oz. Bottle of BlueDevil Rear Main Sealer to up to 8 quarts of engine oil.  BlueDevil Rear Main Sealer will mix with your engine oil and recondition the current rear main seal in your car or truck.  BlueDevil Products will not harm any components in your engine and can stay in the engine oil until your next regular oil change.Double lips silicone rubber oil seals.Many people operate rotary screw compressors with oil seeping from around the shaft.

The mechanical seal and lip seal are the most common types of shaft seals used on Rotary Screw compressors. This housekeeping nuisance and waste of expensive oil can be avoided with a better understanding of the shaft seal.The following provides further information specific to each of these styles.Double lips silicone rubber oil seals.


The common design has a carbon rotating element that is bonded to the shaft with a Buna N or Viton boot. This seals to a steel or a ceramic stationary seat in the housing. Compressors with total closure (air tight) air inlet valves typically used these seals because they could withstand full system pressure reversal during shutdown.

Many mechanical seals are designed as a lubricated part. This means that there is usually an oil feed line to the seal and an oil scavenge line from the seal.

The shaft seal may weep oil continuously while running if something plugs the scavenge line. This line usually attaches to a fitting on the bottom of the shaft seal housing. The fitting and the scavenge line should be checked before replacing the seal.Double lips silicone rubber oil seals.

Also, some air ends may have a check valve in the seal scavenge line or in the inlet valve area where it connects. This can cause a seal to leak if it fails.

Sometimes a leaky mechanical seal is accompanied by a jingling sound from the drive end. This is an indicator of a broken seal spring.
Most mechanical shaft seals work on the same basic principle. A contact sealing face composed of soft, sacrificial face material forms a seal against a hard material.Double lips silicone rubber oil seals.