Product Overview
KF50 NW50 Stainless Centering Ring for Vacuum Sealing with Buna-N O-Ring
Condition
Single unit available. Unused NOS condition with no issues noted during visual evaluation. Evaluation: Visual inspection only. Function testing not performed. Packaging is a bit beat up, but the part is in great shape and looks unused. Genuine Kurt J. Lesker part obtained from a government research facility and covered by our No Hassle PartsMine Guarantee.
Ships same business day from Idaho. Packed carefully.
Product Overview
Kurt J. Lesker QF50-200-SRB is a KF50 centering ring for ISO-KF vacuum systems. It supports and centers the O-ring between two KF50 flanges to create a leak-tight seal in forelines, roughing lines, and chamber ports.
Key Features
- Fits KF50 flanges, also known as NW50 or QF50
- Stainless steel ring construction
- Buna-N nitrile O-ring
- Designed for use with two KF50 flanges and a compatible KF50 clamp
- Temperature range: -20 C to 100 C
- Suitable for ISO-KF quick-flange vacuum systems
Applications
- Foreline vacuum plumbing
- Roughing line connections
- Vacuum chamber port sealing
- General KF50 NW50 vacuum hardware service
Frequently Asked Questions
What flange size does this centering ring fit?
It is designed for KF50 NW50 QF50 flanges only.
What O-ring material does this model use?
This model uses a Buna-N nitrile O-ring.
Will this fit KF40 or CF flanges?
No. It will not fit KF16, KF25, KF40, CF, or ISO-K and ISO-F bolted systems.
Is this suitable for high-temperature bake-out service?
No. The confirmed temperature range for the Buna-N O-ring is -20 C to 100 C, so it is not suitable for bake-out processes above 100 C.
Good choice for buyers who need the Buna-N version of a KF50 centering ring. Verify your flange size and temperature requirements before ordering.
