Rotary O-Ring Seal Gland
Click image above to see design charge, table and guide 5-4
An O-ring has proved to be a practical rotary shaft seal in many applications. With the correct design, Parker O-Ring rotary seal compound N1090-85, will provide satisfactory service at surface speeds up to 1500 feet per minute.
The design conditions are most critical for rotary seals, as would be expected. Relatively high durometer compounds, close control of tolerances, and minimum cross section are required.
Key design points:
•Rotary seals are best if temperature is not colder than -40°C (-40°F)
•Hardened steel shaft materials will wear less
•Design for minimum stretch on the O-ring inner diameter
•Optimum design is dependent on the rotational speed in Feet Per Minute (Feet per minute = .26 x Shaft Diameter (inches) x rpm
•The smallest “W” cross-sectional diameter will have the least amount of friction
|Maximum recommended "W" Cross-section diameter|
|0 to 200||Use Reciprocating Design Guide|
|200 to 400||yes||yes*||yes|
|400 to 600||yes*||yes|
|600 to 1500||yes|
|* .103" “W” dimension is often best option for speeds up to 600 fpm
Design chart 5-4 provides the basis for calculating gland dimensions for rotary O-ring use. For standard O-ring sizes, the hardware dimensions have been calculated and are listed in the design guides pages.