The cartridges are designed to fit both standard bore ANSI-type pumps and oversized bore seal chambers, making them applicable to most process pumps. The present application range for these seals is vacuum to 600 psig, -40 to 500 F, and speeds from 10 to 5000 fpm. However, these boundaries have been and will continue to be expanded in specifically engineered applications. The technology has no limiting factor due to the pressure-velocity relationship or wear at the seal faces. The limiting factor appears to be the materials of construction.
Pressure is limited due to the effect it has on deflection of the seal faces.
New materials are being tested, on an ongoing basis, that will continue to expand these ranges. Also, unlike dual wet seals, the support system for dual dry seals is neither costly nor complicated. A simple, dependable gas panel is shown in Figure 6. The support system here provide a dependable flow of barrier gas to the double seal shown in Figure 5. There may be many candidates in your facility that you have not considered.