11. They are less susceptible to blowing the O-ring seal if banged against something while in use. 12. The left nozzle O-ring seals were not flawed. 13. An O-ring seal in the right booster rocket failed at liftoff, leading to subsequent structural failures. 14. An O-ring seals off the tube, so that the naked electrodes do not contact the water. 15. In the case of Challenger, O-ring seals on the booster rockets failed in the bitter cold. 16. An O-ring seal keeps the plug from leaking. 17. We actually used the toilet wax ring seal for these types of things, but mostly for screws. 18. Last summer, Thiokol reported singeing of O-ring seals located in the nozzles of rocket motors after consecutive launches. 19. But the Norse never learned to use harpoons, and their animal-bone collections are strikingly absent of ring seals . 20. Options include a centrifugal liquid ring seal and a non-contacting inert gas purged labyrinth seal that eliminates leakage.
