SWAGELOK Uhv High Vacuum Gas Feedthrough Conflat SS-4BK-VCR-1C Flange

( Brand: Swagelok ), ( Manufacturer Part Number: SS4BKVCR1C ), ( Part Type: Vacuum Flange )

Review SWAGELOK Uhv High Vacuum Gas Feedthrough Assembly Conflat Flange

The **Swagelok SS4BKVCR1C (SS-4BK-VCR-1C) Ultra-High Vacuum (UHV) Gas Feedthrough with Conflat Flange** is a precision-engineered component designed for demanding applications in scientific research, semiconductor manufacturing, and advanced materials processing where ultra-clean, leak-tight performance is paramount. Constructed from **316L stainless steel**, this feedthrough combines exceptional corrosion resistance with high mechanical strength, ensuring long-term reliability even under extreme conditions. The **Conflat (CF) flange interface**, standardized as a **CF16 (40 mm) flange**, provides a robust, reusable connection that maintains vacuum integrity while allowing for easy integration into complex UHV systems. The feedthrough features a **VCR (Vacuum Compatible Ring) seal**, a high-performance elastomeric gasket that delivers superior leak resistance and repeatable sealing performance across multiple cycles, making it ideal for applications requiring frequent assembly and disassembly without compromising vacuum quality.

At the heart of this feedthrough is a **high-purity, stainless steel gas passage** designed to minimize contamination and maximize flow efficiency, critical for applications such as gas dosing, plasma etching, or thin-film deposition. The **1/4-inch (6.35 mm) female NPT (National Pipe Thread) port** on the non-vacuum side ensures compatibility with standard gas supply lines, allowing for precise control of gas introduction into the chamber. The feedthrough is engineered to withstand **ultra-high vacuum conditions**, typically achieving pressures below **10 Torr**, making it suitable for surface science experiments, electron microscopy, or other applications where residual gas contamination must be minimized. The **polished internal surfaces** and **electropolished finish** further enhance cleanliness, reducing particulate and molecular outgassing that could degrade vacuum performance over time.

For added durability and ease of installation, the feedthrough incorporates a **threaded body design** that allows for secure mounting within the chamber wall or flange assembly, while the **Conflat flange** ensures a consistent, leak-tight seal when mated with complementary CF flanges. The **VCR seal** not only provides an excellent vacuum barrier but also accommodates minor misalignments during assembly, reducing the risk of damage to the gasket or flange. This feedthrough is particularly well-suited for applications in **semiconductor fabrication, synchrotron beamlines, accelerator technology, and materials research**, where reliability, cleanliness, and precision are non-negotiable. Whether used in a research laboratory, industrial vacuum system, or high-energy physics experiment, the **Swagelok SS4BKVCR1C** delivers the performance and durability required to maintain optimal operating conditions in the most demanding UHV environments.

### **Pros and Cons of buying a Swagelok SS4BKVCR1C (SS-4BK-VCR-1C) UHV High Vacuum Gas Feedthrough with Conflat Flange**

1. **Ultra-High Vacuum (UHV) Compatibility** This feedthrough is designed for UHV applications, ensuring minimal outgassing and maintaining extremely low pressure levels (typically below 10 Torr). This is critical for sensitive experiments in surface science, thin-film deposition, or particle physics.

2. **Conflat (CF) Flange Standard** The Conflat flange (typically CF100 or CF160, depending on the exact model) is a widely accepted standard in vacuum systems. It provides a reliable, reusable seal with minimal leakage when properly aligned and bolted.

3. **Stainless Steel Construction** The feedthrough is made of stainless steel (likely 304 or 316), which offers excellent corrosion resistance, durability, and compatibility with most vacuum system materials. This ensures long-term reliability in harsh environments.

4. **Vacuum-Compatible Seal (VCR or KF)** The **VCR (Vacuum Compatible Rubber) or KF (KF Flange)** connection allows for easy integration with other vacuum components without compromising the system s integrity. The VCR seal is particularly useful for high-vacuum applications due to its low outgassing properties.

5. **High-Purity Gas Feedthrough** The design allows for controlled gas introduction into a vacuum chamber without breaking the seal, which is essential for processes like plasma etching, sputtering, or gas dosing in surface science.

6. **Modular and Reusable** Unlike some disposable or one-time-use feedthroughs, this Swagelok component is designed for repeated use, reducing long-term costs and maintenance.

7. **Compatibility with Swagelok Fittings** Since it is part of the Swagelok system, it integrates seamlessly with other Swagelok valves, fittings, and tubing, simplifying system assembly and maintenance.

8. **High-Temperature Resistance** Stainless steel and proper sealing materials can withstand elevated temperatures (typically up to 200 C, depending on the application), making it suitable for some high-temperature vacuum processes.

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1. **High Cost** Swagelok components, especially those designed for UHV applications, are premium-priced. The SS4BKVCR1C is no exception, and the cost may be prohibitive for small-scale or budget-conscious projects.

2. **Specialized Knowledge Required** Proper installation, alignment, and sealing of a UHV feedthrough require expertise in vacuum technology. Improper handling can lead to leaks, contamination, or damage to the system.

3. **Maintenance and Cleaning Challenges** UHV systems demand meticulous cleaning to prevent contamination. The feedthrough s internal surfaces must be thoroughly cleaned after each use, which can be time-consuming and require specialized tools or procedures.

4. **Limited Compatibility with Non-Swagelok Systems** If your vacuum system uses non-Swagelok components (e.g., ISO flanges, custom fittings), integration may require additional adapters or modifications, adding complexity and cost.

5. **Potential for Leaks if Misaligned** Conflat flanges are forgiving but require precise alignment to avoid leaks. If not properly torqued or seated, gas can ingress or vacuum can be compromised.

6. **Weight and Bulk** Stainless steel components are heavy, which may complicate handling, especially in large or complex vacuum chambers.

7. **Long Lead Times** Swagelok and other high-end vacuum components may have longer lead times, particularly for custom or specialized orders.

8. **Potential for Outgassing Over Time** While designed for UHV, any rubber or sealing material (even VCR) can outgas over extended use or high-temperature exposure, requiring periodic bake-outs or replacement.

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The **Swagelok SS4BKVCR1C (SS-4BK-VCR-1C) UHV High Vacuum Gas Feedthrough with Conflat Flange** is an excellent choice for applications requiring **ultra-high vacuum integrity, gas feedthrough functionality, and long-term reliability**. Its stainless steel construction, VCR/KF compatibility, and modular design make it a robust solution for research, semiconductor processing, or scientific instrumentation. However, the **high cost, need for specialized installation, and maintenance demands** may make it less suitable for small-scale or non-UHV applications.

- You are working in a **UHV environment** (e.g., surface science, thin-film deposition, particle physics).

- Your system already uses **Swagelok fittings** or Conflat flanges.

- You have access to **vacuum expertise** for proper installation and maintenance.

- Budget constraints allow for a **premium, high-quality component** that will last for years.

- You are on a **tight budget** look for lower-cost feedthroughs (e.g., some ISO or custom flanged options).

- Your application does **not require UHV** a standard CF or KF feedthrough may suffice.

- You lack **vacuum expertise** consult an experienced technician or supplier for guidance on installation.

- You need **faster lead times** some generic feedthroughs may be available sooner.

For most **serious UHV applications**, this Swagelok feedthrough is a **strong, reliable investment** that justifies its cost through performance and longevity. However, always verify the exact specifications (e.g., flange size, gas compatibility) to ensure it meets your specific requirements.

Details:

Comes as pictured. Shipping Handling. No other accessories. Regardless of the origin equipment, documentation provided or identification appearing upon equipment described and offered here is in no way certified for, recommended for any specific use.

Inventory ID: WH2 Z2-S13B, 033026, BAE. 1841 W Carriage House Dr, Baton Rouge, LA 70815. Please see the pictures for cosmetic condition and components it comes with. We acquired the unit in a state surplus sale.

part #: ss4bkvcr1c prices

• $107.58-$368.49

specifications valvplu:

• brand: Swagelok
• mpn: Ss4bkvcr1c
• part type: Vacuum Flange

returns valvplu:

• paid by: Buyer
• time: 30 Days
• policy: Returns Accepted
• method: Money back

offer valvplu:

• availability: In Stock
• started: March 30, 2026
• best offers: True
• sold: 0
• options: Ship-to-home
• quantity: 1

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general valvplu:

• condition: Used
• Pumps Pump Accessories > Vacuum Pumps > Other Vacuum Pumps

shipping valvplu:

• transit: 3-8 Days
• service: Standard
• type: Fixed
• class: Standard
• cost: $50.00

seller valvplu:

• rating: 100.0%
• # reviews: 2133
• city: Baton Rouge, Louisiana

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