Silver Plated OFHC Copper Gasket
Model:KXT 1230
China Quality Silver pladed OFHC copper gasket, you can buy from us Silver plated OFHC Copper gasket with cheap price and quick delivery
Ag-Plated · Model KXT 1230
Silver Plated OFHC Copper Gasket — Engineered for Frequent Bakeout UHV Systems
Silver Plated OFHC Copper Gaskets (KXT 1230) are oxygen-free high-conductivity copper gaskets coated with a thin silver layer, specifically designed for ultra-high vacuum (UHV) systems that require frequent high-temperature bakeouts. The silver coating prevents copper diffusion and gasket-to-flange sticking after repeated thermal cycling — a known failure mode of plain copper gaskets in high-cycle bakeout chambers.
Like the standard OFHC copper gasket, the silver-plated version fits CF16 through CF250 knife-edge flanges, operates down to 10⁻¹³ torr (10⁻¹¹ Pa), and tolerates bakeout up to 450°C. Every gasket is punched from 1/4-hard, high-purity copper and individually packaged for clean handling.
Plain OFHC Copper Standard UHV gasket
- Single-use; not reusable after bakeout
- Tends to stick to flange after repeated thermal cycling
- Copper diffusion into flange surface over many bakeout cycles
- Best for systems opened and re-sealed infrequently
- Lowest material cost
Silver Plated OFHC Copper KXT 1230 — Recommended for bakeout
- Prevents sticking to flange during high-temperature bakeouts
- Silver barrier blocks copper diffusion into flange surface
- Reduces flange re-machining costs in high-cycle systems
- Recommended for systems requiring frequent bakeouts
- Same UHV performance as plain copper: 10⁻¹¹ Pa
10⁻¹¹ Pa UHV Rating
450°C Bakeout
CF16 – CF250 Flange Range
Ag-Plated Anti-stick Layer
Why Silver Plating
Why choose silver plated copper over plain copper CF gaskets?
Direct answer: Silver plated copper gaskets are recommended for UHV systems that require frequent high-temperature bakeouts. The silver plating acts as a diffusion barrier between the copper gasket and the stainless steel flange, preventing the two metals from cold-welding or sticking together after repeated thermal cycles — which would otherwise require expensive flange re-machining.
Diffusion Barrier
The silver layer prevents copper from diffusing into the stainless steel flange surface during extended bakeouts, protecting the knife edge from degradation.
Anti-Stick After Bakeout
Silver resists cold-welding to stainless steel, so the gasket separates cleanly from the flange after high-temperature cycles — no scraping or re-machining required.
Optimized for Frequent Bakeout
Ideal for systems opened and resealed often — semiconductor process tools, surface analysis chambers, and high-cycle research equipment.
Identical UHV Performance
Same 10⁻¹¹ Pa vacuum rating, same 450°C bakeout limit, and same CF16–CF250 compatibility as the standard OFHC copper gasket.
Specifications
What CF flange sizes and dimensions does Kaxite supply?
Direct answer: Kaxite supplies 10 standard sizes of silver plated OFHC copper gasket — CF16, CF25, CF35, CF50, CF63, CF80, CF100, CF150, CF200 and CF250. Non-standard sizes and plating thicknesses are manufactured on request.
| Type | A — ID (mm) | B — OD (mm) | Order No. | Weight (kg) |
|---|---|---|---|---|
| CF16 | 16.2 | 21.3 | 7355 | 0.01 |
| CF25 | 25.6 | 35 | 7356 | 0.01 |
| CF35 | 36.8 | 48.1 | 7357 | 0.02 |
| CF50 | 52 | 61.6 | 7358 | 0.02 |
| CF63 | 63.6 | 82.4 | 7359 | 0.05 |
| CF80 | 82 | 99 | 7360 | 0.07 |
| CF100 | 102 | 120.5 | 7361 | 0.07 |
| CF150 | 152.5 | 171.3 | 7362 | 0.10 |
| CF200 | 203 | 222.1 | 7363 | 0.14 |
| CF250 | 254 | 273.1 | 7364 | 0.20 |
Standard CF dimensions. Silver plating thickness and non-standard gasket sizes are available upon request. Individually packaged for clean handling.
CF16 CF25 CF35 CF50 CF63 CF80 CF100 CF150 CF200 CF250
Applications
Where are silver plated OFHC copper CF gaskets used?
Direct answer: Silver plated copper CF gaskets are used in UHV systems that undergo frequent high-temperature bakeouts — including semiconductor process tools, surface science chambers, synchrotron and accelerator beamlines, and any vacuum chamber where the flange is opened and resealed repeatedly.
Semiconductor Process Tools
Ion implanters, plasma etch systems, and CVD/PVD chambers that require routine maintenance bakeout cycles and frequent flange reassembly.
Surface Science Chambers
XPS, AES, LEED and other surface analysis tools where sample transfer and chamber maintenance require repeated UHV bakeout cycles.
Synchrotron & Accelerator
Beamline vacuum joints where components are swapped frequently and the flange surface must be preserved over years of service.
Research & Analytical Instruments
Mass spectrometers, electron microscopes, and instrument chambers where bakeout cycles are routine and flange damage is costly.
Industrial Vacuum Systems
Freeze dryers and vacuum furnaces that require periodic bakeout for process cleanliness and long-term metal seal integrity.
High-Cycle Maintenance Systems
Any UHV system where the flange is opened more than a handful of times — the anti-stick silver layer pays for itself in reduced flange re-machining.
FAQ
Frequently asked questions about silver plated copper CF gaskets
Q1What is a silver plated OFHC copper gasket?
A silver plated OFHC (oxygen-free high conductivity) copper gasket is a knife-edge metal seal used between two CF (Conflat) flanges, with a thin silver layer plated on the copper surface. The silver layer prevents copper diffusion and sticking to the stainless steel flange after repeated high-temperature bakeouts.
Q2When should I choose silver plated over plain copper?
Choose silver plated copper when the UHV system requires frequent high-temperature bakeouts, or when the flange is opened and resealed repeatedly. The silver barrier prevents the copper from cold-welding to the flange, avoiding expensive re-machining of the knife edge.
Q3Does the silver plating affect vacuum performance?
No. Silver plated copper gaskets maintain the same UHV rating (10⁻¹¹ Pa), same 450°C bakeout limit, and same CF16–CF250 compatibility as plain OFHC copper gaskets. The silver layer only improves the interface behavior between the gasket and the flange.
Q4What is the silver plating thickness?
Standard silver plating thickness is typically 5–10 microns. Custom plating thickness can be arranged for high-cycle bakeout applications. Provide your requirement when requesting a quote.
Q5What sizes are available?
Kaxite supplies 10 standard sizes — CF16, CF25, CF35, CF50, CF63, CF80, CF100, CF150, CF200 and CF250 — plus non-standard sizes manufactured to customer drawings.
Q6Are silver plated copper gaskets reusable?
No. Like plain copper CF gaskets, silver plated versions are single-use. The knife edge permanently deforms the copper, so a fresh gasket must be used each time the flange is opened to maintain vacuum integrity.
Q7Can silver plated copper gaskets be used on aluminum CF flanges?
No. Aluminum CF flanges must use aluminum gaskets, never copper or silver plated copper. Aluminum gaskets may only be used on stainless steel CF flanges if baking is restricted to 200°C.
Q8How are Kaxite silver plated gaskets cleaned and packaged?
Every gasket is chemically cleaned and processed through proprietary deburring and polishing procedures designed specifically for vacuum applications. Each gasket is individually packaged for clean handling.
Q9What is the MOQ and lead time?
MOQ depends on size and quantity — small trial orders are possible for standard sizes. Sample lead time is typically 5–7 days. Production lead time for standard and custom orders is typically 15–25 days after order confirmation.
Q10Can Kaxite manufacture non-standard silver plated gaskets?
Yes. Kaxite manufactures non-standard silver plated gaskets upon customer requirement. Provide inner diameter, outer diameter, thickness, plating specification and knife-edge profile details for a custom quotation.
Why Kaxite
Why choose Kaxite for silver plated copper CF gaskets?
10+ Years of Experience Ningbo Kaxite Sealing Materials Co., Ltd. has more than a decade of sealing materials production experience.
Complete CF Range Full range of standard sizes CF16 through CF250 — plus non-standard sizes manufactured to your drawing.
Vacuum-Grade Cleanliness Proprietary deburring and polishing processes designed specifically for vacuum applications.
Individually Packaged Every silver plated gasket is individually packaged for clean handling in UHV environments.
Request a quote for Silver Plated OFHC Copper Gaskets
Send us your CF flange size (CF16 to CF250), quantity, plating thickness preference, and bakeout cycle frequency. Kaxite's technical team will respond within 2 business hours with pricing and lead time. For non-standard sizes, include a drawing with inner and outer diameters, thickness, and knife-edge profile.
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