Oil Seals (Rotary Seals)

Oil seals (also know as rotary seals or shaft seals) cover a wide range of applications ranging from domestic equipments to automotive and power plant machinery, industrial pumps, gas and aircraft turbines and compressors. If yours is a modern system, the surface speed can go up to 30 m/s and operating temperature can be as high as 130 degree Celcius. Here at Advanced Sealing Devices, we make and design reliable oil seals for your demanding tasks. If the oil seal is not selected properly, then even a few percents of leakage can be inconvenient and incur expenses to a large number of users, as well as cause environmental pollution. We understand that the reliability and reputation of your system depends on the well functioning of these seals.

Our oil seals are group into the following sections:

• General Purpose High Performance Oil Seals
• PTFE Oil Seals with stainless steel casing
• PTFE Oil Seals with O Rings
• Rotary V Seals
• Rubber Fabric Oil Seals

In making oil seals, we employ modern polymeric seal materials and we rely on our good understanding of the sealing mechanism that occur at the sealing interface. We will thus provide you with reliable oil seals and also to enhance protection of the environment.

The cross section of an oil seal is shown below. The figure on the left shows an oil seal with a rubber-encapsulated metal part, while the figure on the right is a fully metal casing oil seal.

Standard oil seals operate in a splash environment with no pressure or little pressure as low as 0.3 – 0.5 bars. If you have a higher pressure requirement, contact us and we can provide you with a different type of design. If a standard type of oil seal is used in a high pressure situation, lip distortion and wear will occur. This will shorten the lifespan of the oil seal and create unnecessary downtime. If your housing tolerances are not controlled as closely as standard housings, we can make the outer casing of oil seals with special profile so that the oil seals can seat properly in your housing before the assembly press tool is removed.

PTFE oil seals with stainless steel casing

If you application is such that the lubricating liquid is not continuously available, or the operating temperature, fluid compatibility, the speed and pressure are of a more demanding nature, then we can make oil seals using stainless steel outer casings with various pure and filled PTFE lips (type ASD SS-PTFE). This type of oil seal is now widely used by our customers in the automotive and transmissions industry. A stainless steel casing with a PTFE lip oil seal will support more highly rated machinery and allow longer oil change intervals. Our ASD SS-PTFE type is particularly suitable for dry running application, for example, an engine may run dry for some period during startup until oil splash is available especially after a long period of storage or transportation. There are certain design aspects that are required in your system before using our ASD SS-PTFE type oil seal; contact us and we will advise you on this aspect. The following are some examples of stainless steel oil seals we make for our customers.

Beside oil seals, we can also make sealing devices which seal on the radial face of your system, as opposed to the axial face for oil seals. With this type of seals, your shaft surface finish can be less critical and the seals can operate with minor runout and misalignment.

General Purpose High Performance Oil Seals

This type of oil seals are available either in metal or rubber casing. The rubber can be made of nitrile based, EPDM, FKM (Viton), or a material of your choice. Only two examples of profiles are shown here, contact us for more.

Type		Features
RS1		Oil-seal with rubber casing. Maximum operating speed is 30 m/s and operating pressure of 0.5 bar
RS1T		Oil-seal with metal casing. Maximum operating speed is 30 m/s and operating pressure of 0.5 bar

PTFE Rotary Seals with O-Ring

Type		Features
RS10		RS10 has a small cross sectional wide of only 3.9mm and it is designed for inside sealing. It is highly suitable for small space components. RS10 also incorporates a groove to retain lubrication. The O-ring can be made of one of those traditional elastomers while the main body can be made of reinforced PTFE. Standard operating pressure of 360 bar, operating speed of 0.5 m/s and operating temperature will depend on combination of O-ring and body material.
RS11		RS11 is designed for outside sealing and its characteristics are similar to that of the RS10.

Rotary V-seals

Type		Features
RS6		RS6 rotates with a shaft and it seals on a radial face rather than axially along the shaft. Shaft finish can be less critical and will operate with considerable runout and misalignment. The axial shaft movement is accommodated by the flexing of the seal. It can also be acted as an wiper to exclude dirt in grease applications. Operating temperature depends on material of construction, shaft speed up to 8.1 m/s. RS6 has a large cross section which can accommodate a large axial movement of 12 mm.
RS7		RS7 has wide and slated cross-section, for shaft with high speed.

Rubber Fabric Rotary Shaft Seal

Type
RS3		A double-acting rotary Oil seal with two end portions make of hard plastics to prevent extrusion of the seal into the clearance gap. Operating pressure of 400 bar and speed of 0.2 m/s.
RS9		A double-acting rotary Oil seal with two end portions make of high grade fabric reinforced rubber. RS9 can be used in hydraulic oil, water and emulsions, operating temperature of 80oC, pressure of 200 bar and rotating speed of 0.1 m/s
RS12		A rotary Oil seal consists of a fibre reinforced rubber bonded to the top part of a rubber seal. It also has a spring to assist the lip of the seal to be in contact with the shaft and a groove to contain lubricant. Maximum operating temperature of 80 - 100oC, rotating speed of 20 m/s and pressure of 0.5 bar.