These centering rings with mesh screen are used for mating KF flanges, particularly at the inlet of a pump to filter debris, and include both the centering ring and o-ring. The KF (QF) flange is used for through- or foreline vacuum plumbing and for simple HV chamber ports.
KF Centering Rings with Screen Feature:
- Stainless steel ring with fluorocarbon o-ring and #72 mesh screen
- Used at mechanical pump inlet to prevent passage of loose debris through orifice
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