Description
Inficon Centering Ring with Throttle KF25 PN 211-623.
This INFICON ISO-KF 25 fittings are manufactured according to ISO 2861/1, DIN 28403 and Pneurop 6606. Our quality fittings are the standard components for all vacuum and high vacuum applications. This is a simple NW KF Valve fitting for automatic soft starts. The Auto-Soft valve has a vane that pivots about an off-center axis. A pair coil springs hold the vane open when the pressure differential is low enough. When the roughing system goes into operation, the initial flow closes the vane assembly, automatically throttling the roughing pump. Initial pumpdown occurs through small openings around the vane. This reduces the effective pumping speed, which minimizes turbulence and extends pumpdown time. When the pressure differential reaches the level determined by the springs, the springs open the vane and full pumping speed is restored. The high quality INFICON components are designed and tested for leak rates less than 1 x 10-9 mbar l/s.
