VAT 21628-KA41-AAK2-0008 Pfeiffer Smc Fischer High Vacuum 21628-KA41-AAK2/0008 Angle Valve 26.4

( Brand: Vat ), ( Manufacturer Part Number: 21628-KA41-AAK2/0008 ), ( Part Type: Vacuum Angle Valve )

Review VAT Pfeiffer Smc Fischer 21628-ka41-aak2/0008 High Vacuum Angle Valve 26.4 Parts Untested

The **VAT Pfeiffer SMC Fischer 21628-KA41-AAK2/0008** is a high-performance, precision-engineered **high vacuum angle valve** designed for demanding applications in scientific research, semiconductor manufacturing, and industrial processes where ultra-clean and reliable gas handling is critical. This valve operates within the **ultra-high vacuum (UHV) to high vacuum (HV) range**, delivering exceptional leak tightness and durability while maintaining a compact yet robust construction. Its **26.4 mm (1.04 in) nominal port size** strikes a balance between flow efficiency and system integration, making it ideal for medium-scale processes such as thin-film deposition, sputtering, or analytical instrumentation where precise gas introduction or isolation is required.

Constructed from **stainless steel (AISI 304 or 316L)**, the valve is engineered to withstand the harshest environments, including repeated thermal cycling, aggressive chemical exposures, and prolonged exposure to corrosive gases. The **KA41 designation** indicates a **pneumatic or manual actuator interface**, allowing for seamless integration into automated control systems or manual operation, depending on the application s requirements. The **AAK2/0008 designation** specifies a **flanged connection (ISO-KF 26.4 or CF 1.0")**, ensuring compatibility with standard vacuum chambers and fittings while minimizing dead volume a critical factor in maintaining system efficiency. The valve s **angle design** (90 orientation) optimizes space utilization in compact setups, reducing the overall footprint without compromising performance.

At the heart of this valve lies a **metal-sealed, bellows-isolated valve mechanism**, which eliminates the need for traditional elastomeric seals that can outgas or degrade over time. This design ensures **ultra-low outgassing rates** (typically below 1 10 torr L/s cm ), making it suitable for applications where residual contamination could compromise results, such as in electron microscopy, surface science, or semiconductor wafer processing. The **high-vacuum-compatible bellows** also provide superior resistance to fatigue, extending the valve s operational lifespan even under cyclic loading conditions. Additionally, the **pneumatic or manual actuation** ensures smooth, repeatable operation with minimal hysteresis, while the **integrated vacuum feedthroughs** prevent external leaks and maintain system integrity.

For applications requiring **remote control or automation**, the valve can be paired with a **pneumatic actuator** (such as the SMC series) for precise, repeatable actuation via compressed air or vacuum signals, enabling seamless integration into automated process sequences. The **manual override capability** ensures flexibility for maintenance or troubleshooting without disrupting the entire system. The valve s **flanged connection** (ISO-KF or CF) allows for easy installation and removal, facilitating routine maintenance or component upgrades. Furthermore, the **high-vacuum-compatible materials and finishes** including electropolished surfaces minimize particle generation and ensure compliance with the strictest cleanliness standards.

Overall, the **VAT Pfeiffer SMC Fischer 21628-KA41-AAK2/0008** is a versatile, high-reliability valve that excels in environments where **precision, durability, and contamination control** are paramount. Whether used in **research laboratories, semiconductor fabrication, or specialized industrial processes**, this valve delivers consistent performance, long-term stability, and the ability to maintain critical vacuum levels with minimal maintenance. Its combination of **metal-sealed integrity, compact design, and adaptable actuation** makes it a trusted choice for engineers and scientists demanding the highest standards in vacuum technology.

### **Pros and Cons of buying a VAT Pfeiffer SMC Fischer 21628-KA41-AAK2/0008 High Vacuum Angle Valve (26.4)**

1. **High-Quality Manufacturing** Produced by VAT (Vacuum Atmospheres Technology), a reputable brand known for precision-engineered vacuum components. The SMC Fischer division further enhances reliability with robust construction.

2. **High Vacuum Performance** Designed for ultra-high vacuum (UHV) and high vacuum applications, ensuring minimal leakage and stable operation at pressures as low as 10 mbar or better, depending on the system configuration.

3. **Durable Materials** Constructed with corrosion-resistant materials (likely stainless steel, CF flanges, and vacuum-compatible seals) that withstand harsh environments, including cryogenic and high-temperature applications.

4. **Compact Design** The angle valve configuration allows for efficient space utilization in vacuum chambers, reducing installation complexity compared to linear valves.

5. **Modular and Compatible** The **26.4** designation suggests a **26.4 mm (1.04 in) CF (Conflat) flange** connection, making it compatible with standard CF vacuum systems, reducing integration challenges.

6. **Long Service Life** High-quality seals (e.g., Viton, Kalrez, or metal seals) and robust actuation mechanisms minimize wear, extending operational lifespan.

7. **Precision Control** Suitable for applications requiring fine control, such as semiconductor manufacturing, research labs, or particle accelerators, where leak rates must be extremely low.

8. **After-Sales Support** VAT Pfeiffer is a well-established brand with global support networks, ensuring availability of spare parts, maintenance, and technical assistance.

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1. **High Initial Cost** As a premium vacuum component, this valve is significantly more expensive than generic or lower-quality alternatives. The price may range from **$2,000 to $5,000 **, depending on configuration and supplier.

2. **Specialized Knowledge Required** Installing and maintaining high-vacuum valves demands expertise in vacuum technology. Improper handling can lead to contamination or damage, increasing operational risks.

3. **Limited Compatibility with Non-CF Systems** If your system uses **KF, ISO, or other flange standards**, additional adapters may be needed, adding cost and complexity.

4. **Potential for Contamination** Even high-quality valves can introduce particulate or outgassing if not properly baked or cleaned before installation. This is critical in UHV applications.

5. **Actuation Mechanism Dependence** The valve s operation (manual, pneumatic, or electric) may require additional controllers or power sources, increasing system integration costs.

6. **Lead Times** Due to custom engineering and global supply chain dependencies, lead times for delivery or repairs can be longer than standard industrial components.

7. **Maintenance Requirements** While durable, periodic checks for seal integrity, flange tightness, and actuator functionality are necessary to prevent failures in critical applications.

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The **VAT Pfeiffer SMC Fischer 21628-KA41-AAK2/0008** is an **excellent choice** for applications demanding **ultra-high vacuum performance, reliability, and precision**. Its **superior materials, compatibility with CF systems, and long-term durability** justify the higher cost for industries like **semiconductor manufacturing, scientific research, or particle physics**.

However, the **high upfront investment, need for specialized expertise, and potential integration challenges** make it less ideal for **budget-conscious or non-vacuum-specialized applications**. If your system requires **high-vacuum integrity and long-term stability**, this valve is a **strong recommendation**. For less demanding applications, a **lower-cost alternative** (e.g., a basic CF angle valve from a different manufacturer) may suffice.

- You operate in a **UHV or high-vacuum environment** (e.g., semiconductor fabrication, synchrotrons, or research labs).

- Your system uses **CF flanges**, and you prioritize **minimal leakage and long-term reliability**.

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

- Your budget is **strictly limited**, and lower-cost valves (e.g., from Edwards, Leybold, or smaller manufacturers) meet your requirements.

- Your system uses **non-CF flange standards**, as adapters may be needed.

- You lack **vacuum system expertise**, as improper handling could compromise performance.

For most **high-end vacuum applications**, this valve is a **sound investment** due to its **proven performance and longevity**. Always verify compatibility with your specific system and consult with a vacuum specialist before purchase.

Details:

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part #: 21628ka41aak20008 prices

• $375.00-$11423.00

specifications valvesplumbing:

• brand: Vat
• mpn: 21628-ka41-aak2/0008
• part type: Vacuum Angle Valve

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• quantity: 1
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• started: April 13, 2026
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