Seal selection.
Seal selection.
(OP)
As per API 682 , In seal Types A,B,C. Type B flexible element normally rotates.and in Type C flexible element is normally stationary.
As I understand - if seal seal-face surface speed is below 23 m/s than flexible element rotates and if seal- face surface speed is more than 23 m/s than flexible element is stationary.
I have 2 question regarding this,
1) Is my understanding is OK? is this only criteria to choose seal type?
2) How can i calculate seal-face surface speed?
Thank you in advance.
As I understand - if seal seal-face surface speed is below 23 m/s than flexible element rotates and if seal- face surface speed is more than 23 m/s than flexible element is stationary.
I have 2 question regarding this,
1) Is my understanding is OK? is this only criteria to choose seal type?
2) How can i calculate seal-face surface speed?
Thank you in advance.





RE: Seal selection.
Calculating seal face surface speed is relatively simple. A good explanation is given in this article from Texas A&M's Turbo Lab. It's old, but the information is still relevant for the purposes of this conversation. http://turbolab.tamu.edu/proc/turboproc/T12/T129-1...
v = (η * π * D) / 60,000
For D, use the seal face diameter (or simply the published seal size for a quick and easy evaluation).
η is your shaft speed