Questions regarding series dry gas seals
Thread Content
What is the difference between using a series dry gas seal in a centrifugal pump and in a centrifuge? When used in centrifugal pumps, are there also primary seal gas, secondary seal gas, and isolation gas?
For centrifugal pumps, only a dry gas seal on the outside and a conventional mechanical seal on the inside are used, in series.
May I ask what is the function of the dry gas seal outside, and how are the spring, stationary, and rotating rings arranged? Are the two seals from the medium side to the atmosphere side a spring-driven moving ring and a static ring + spring, or a static ring and a moving ring? Can the dry gas also carry away the medium that leaks from the mechanical seal into the liquid collection tank? I don’t quite understand what the experienced technician meant when he said that the first mechanical seal leaks into the liquid collection tank, while the second one leaks onto the site. The flushing protocol used is 32 72 75. Thank you!:P