MDC 454005 Uhv Vacuum Od Conflat Manual Vp Shutter Flange VPS-675 4.5 VPS-450

( Brand: Mdc ), ( Manufacturer Part Number: 454005 ), ( Model: VPS-675 ), ( Type: Vacuum ), ( Country Of Origin: United States )

Review MDC Used And Tested Uhv Vacuum 4.5 Inch Od Conflat Manual Vp Shutter Flange

The **MDC 454005 UHV Vacuum 4.5" OD Conflat Manual VP Shutter Flange (VPS-450)** is a precision-engineered, ultra-high-vacuum (UHV) compatible component designed for demanding applications in scientific research, semiconductor manufacturing, and advanced materials processing. This high-performance flange integrates a robust **Conflat (CF) 4.5" outer diameter (OD) design**, adhering to the industry-standard ISO-KF 4.5" interface, ensuring reliable sealing and compatibility with a wide range of UHV chambers, pumps, and instrumentation. The manual VP (Vacuum Port) shutter mechanism provides precise control over gas or particle flow, allowing operators to isolate sections of a vacuum system with minimal contamination risk. Constructed from **high-purity stainless steel (typically 304 or 316L grade)**, the flange is designed to withstand extreme vacuum conditions achieving pressures as low as **10 Torr** while maintaining structural integrity under thermal cycling and mechanical stress. The **Conflat seal** employs a copper gasket (often nickel-plated for enhanced durability) that deforms under bolt torque, creating an ultra-leak-tight interface without the need for additional lubricants, thus preserving the UHV environment. The manual shutter operates via a **geared or direct-drive mechanism**, allowing for smooth, repeatable opening and closing motions with minimal backlash, ensuring consistent performance over thousands of cycles. This flange is particularly well-suited for applications requiring **clean, contamination-free isolation**, such as in electron microscopy, thin-film deposition, surface science experiments, or plasma etching systems. Its modular design facilitates easy integration into existing vacuum systems, and the absence of outgassing materials ensures long-term reliability in high-purity environments. Whether used in research laboratories, industrial R&D facilities, or specialized manufacturing processes, the MDC 454005 VPS-450 delivers a balance of precision, durability, and vacuum integrity, making it an indispensable component for professionals demanding the highest standards of performance in UHV applications.

The **MDC 454005 UHV Vacuum 4.5" OD Conflat Manual VP Shutter Flange (VPS-450)** is a high-quality vacuum component commonly used in scientific, industrial, and research applications requiring ultra-high vacuum (UHV) environments. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros**

1. **Ultra-High Vacuum (UHV) Compatibility**

The flange is designed for UHV applications, ensuring minimal outgassing and high sealing integrity. This is critical for experiments requiring extreme cleanliness, such as surface science, thin-film deposition, or particle physics research.

2. **Conflat (CF) Flange Standard**

The 4.5" OD Conflat flange adheres to the **CF standard (ANSI/VMA 31.1)**, which is widely used in vacuum systems. This ensures compatibility with other CF components, making integration into existing setups straightforward. The standard also guarantees reliable sealing when properly torqued.

3. **Manual VP (Vacuum Port) Shutter Mechanism**

- Inserting or removing components (e.g., samples, probes) without venting the entire system.

- Reducing contamination risk by minimizing exposure to atmospheric gases.

- Simplifying maintenance procedures in complex setups.

4. **High Durability and Material Quality**

MDC (Manufacturing Designs, Inc.) is a reputable manufacturer known for producing high-precision vacuum components. The flange is likely made from **304 or 316 stainless steel**, materials resistant to corrosion, thermal cycling, and prolonged exposure to vacuum conditions. The Conflat design uses a copper gasket (often included or optional), which provides an excellent seal even under thermal stress.

5. **Versatility in Applications**

- **Surface science** (e.g., LEED, AES, XPS).

- **Thin-film deposition** (e.g., sputtering, evaporation).

- **Particle accelerators and synchrotrons**.

- **Semiconductor manufacturing** (though some applications may require additional cleanliness standards).

- **Research in plasma physics or space simulation chambers**.

6. **Easy Installation and Maintenance**

The manual shutter is operated via a simple handle or lever, requiring no additional power or complex controls. This makes it user-friendly for technicians who may not have specialized training. The Conflat design also allows for easy disassembly and cleaning if needed.

7. **Compatibility with Common Vacuum Systems**

The flange can be integrated with turbomolecular pumps, ion pumps, or diffusion pumps, depending on the application. Its standard size (4.5") ensures availability of adapters, feedthroughs, and other accessories.

8. **Long-Term Reliability**

Properly maintained, Conflat flanges can last decades in UHV environments. The manual shutter reduces wear on the gasket compared to automated shutters, which may have more moving parts prone to failure.

---

### **Cons**

1. **Cost**

The MDC 454005 is a **premium UHV component**, and its price reflects the quality and precision involved. For budget-conscious projects or non-UHV applications, alternatives like **KF flanges (lower cost, but not UHV-rated)** or **cheaper manual shutters** may be considered. However, cutting corners on UHV components can lead to leaks or contamination, potentially costing more in the long run.

2. **Manual Operation Limitations**

- **Remote or automated systems** where motorized shutters (e.g., MDC s VPS-450M) are preferred.

- **High-throughput applications** where frequent access is needed, as manual operation may slow down workflows.

- **Hazardous environments** (e.g., radioactive or cryogenic setups) where remote control is safer.

3. **Gasket Maintenance and Replacement**

- **Thermal cycling** (expansion/contraction can weaken the seal).

- **Contamination** (residues from experiments or improper handling).

- **Mechanical stress** (over-torquing can damage the gasket).

Replacing gaskets requires careful handling to avoid cross-contamination, and improper installation can lead to leaks.

4. **Space and Installation Constraints**

The 4.5" OD flange is larger than smaller CF sizes (e.g., 2.75" or 1.5"), which may limit its use in compact systems. If space is a constraint, alternative designs (e.g., **NW flange** or **custom CF adapters**) may be needed.

5. **Learning Curve for Proper Installation**

- Correct **torque values** (over-torquing can damage the gasket; under-torquing can cause leaks).

- Proper **gasket alignment** (misalignment can lead to uneven sealing).

- Cleanliness (residues or debris can compromise the vacuum).

Inexperienced users may struggle initially, potentially leading to leaks or wasted time.

6. **Limited Customization**

The VPS-450 is a standard manual shutter flange. If specialized features are needed (e.g., **motorized control, vacuum interlocks, or integrated pressure gauges**), additional components may be required, increasing complexity and cost.

7. **Potential for Leaks in Improper Use**

- The gasket is damaged or improperly installed.

- The flange is not torqued evenly (using a torque wrench is recommended).

- The system is exposed to temperature extremes without proper thermal management.

Detecting and fixing leaks in UHV systems can be time-consuming and may require specialized tools (e.g., helium leak detectors).

---

### **Conclusion**

The **MDC 454005 UHV Vacuum 4.5" OD Conflat Manual VP Shutter Flange (VPS-450)** is an excellent choice for applications requiring **reliable, high-integrity UHV sealing with manual access control**. Its strengths lie in its **standardized design, durability, and compatibility with a wide range of UHV systems**, making it a trusted component in research and industrial settings. However, its **higher cost, manual operation limitations, and maintenance requirements** may pose challenges depending on the specific use case.

For most **UHV-sensitive applications** (e.g., surface science, thin-film deposition, or particle physics), the benefits outweigh the drawbacks. If budget or space is a concern, alternatives like **motorized shutters (e.g., MDC VPS-450M)** or **smaller CF sizes** should be considered. For non-UHV applications, **KF flanges or cheaper manual shutters** may suffice.

---

### **Recommendation**

- You require a **reliable UHV-compatible flange** for critical applications.

- Your system **benefits from manual access control** without frequent automation needs.

- You are working with **standard 4.5" CF components** and need seamless integration.

- You prioritize **long-term durability and low outgassing** over cost savings.

- Your budget is **strictly limited**, and you can justify using a lower-cost flange (e.g., KF) for non-UHV applications.

- You need **frequent or remote operation**, in which case a **motorized shutter (e.g., MDC VPS-450M)** is preferable.

- Your system has **extreme space constraints**, and a smaller CF size (e.g., 2.75") would suffice.

- You lack experience with **Conflat flanges**, and training or a simpler design (e.g., a basic manual shutter) would reduce risk.

- Verify that the **gasket is included** (some models require separate ordering).

- Ensure compatibility with your **pump system and other CF components**.

- Consider purchasing from a **reputable distributor** (e.g., MDC s official site, Vacuum Specialties, or specialized vacuum supply companies) to avoid counterfeit or low-quality replicas.

- If possible, **test the flange in a non-critical setup first** to confirm proper sealing and operation before full integration.

Details:

Equipment Testing: Part has been used and tested, all parts are in functioning order. USED TESTED MDC UHV Vacuum 4.5 OD Conflat Manual View port Shutter Flange VPS-450. Defective items, missing or inaccurate. Selling the item AS IS.

part #: 454005 prices

• $65.00-$95.00

specifications valvplu:

• brand: Mdc
• mpn: 454005
• model: Vps-675
• type: Vacuum
• country of origin: United States

offer valvplu:

• availability: In Stock
• sold: 0
• quantity: 1
• options: Ship-to-home
• started: April 2, 2026

shipping valvplu:

• class: Standard
• service: USPS Ground Advantage
• carrier: USPS
• cost: $9.81
• transit: 5-11 Days
• type: Calculated

returns valvplu:

• policy: No Returns

general valvplu:

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

seller valvplu:

• # reviews: 1
• rating: 100.0%
• city: Houston, Texas

payments valvplu:

• other
• wallet: Google-pay
• credit card: Discover

Mdc 454005 Is Similar To:

• 100025 Mdc Blank Rotatable Flange Cfbr (29.7% similar) Mdc blank 6 rota table flange cobra 150: used, good condition. Some minor scratches and dings...(May 19th, 2018)
• 100450 Mdc Accu-glass Vacuum Products (25.2% similar) Unless explicitly noted...(January 11th, 2018)
• 1004a Alcatel Mdc Vacuum Bellow Used Working (26.9% similar) 2, KF-25, 36 inch long. Buyer has the option to use their own shipping account. Specifications qty. Pictured test equipment is not included or available for sale. Two of the below in lot are long and other note: buyer has option to use their own shipping account. 2: KF-25, 48 inch long qty. The ...(May 8th, 2018)
• 110004 Mdc Flange (18.7% similar) Mdc F133075 flange: new in packaging as shown...(May 28th, 2018)
• 110018 Mdc Vacuum Conflat Flange Blank (40.6% similar) Shipping only to the USA. Some scratches, nicks and blemishes, particularly around bolt holes. 5 non-rota table conflat flange blank. Mdc vacuum n, ref. Knife edge is in good condition...(November 11th, 2018)
• 110025 Mdc Vacuum Conflat Flange Blank (40.6% similar) Mdc vacuum P/N non-rota table conflat flange blank. Signs of normal wear, blemishes and scratches, particularly around the bolt holes. Available for shipping only to the USA...(November 5th, 2018)
• 130018 Huntington Mdc Norcal 4.5-inch (18.9% similar) 5 inches 1 one. Note: PPS are accepted only from major accredited American universities, us-based corporations. Knife edges are in great shape see pics. Canada, Europe, Australia, new Zealand, Taiwan, japan, Korea and china very good condition. All test equipment must be deployed in combination with...(November 23rd, 2017)
• 150-6 Mdc Vacuum Cross Tube Uhv Fitting New (24.1% similar) Uhv rated to 1X10-13HIGH temperature 450 code copper or optional Vito elastic gaskets clearance bolt holes conflat compatible design standard matte finish each axis has one rota table flange body type dependent on tube flanges 304SSGASKETS foe copper bolts 300SS and silver plated fastening ...(August 15th, 2018)
• 150001 Mdc Lot Cf Conflat Vacuum Flange Reducer (36.5% similar) All offered products are sold as advertised, is and without warranty. The unpacked weight of this item is 2 pounds. 33 cf conflat vacuum flange reducers, along with two new-in-bag no software, power cords, or other accessories are included unless stated above. 75 gaskets, as shown. 33 copper gaskets...(August 23rd, 2018)
• 150016 Mdc Uhv Zero Length Reducer Cf To Ultra High Vacuum (18.9% similar) 4 all equipment is sold as-is. Most items were purchased at inventory reduction, government surplus, or semi-conductor equipment sales. This ultra high vacuum adapter has clean knife edges warranted to seal. 75 cf uhv reducer. This includes all original packaging, labels, instructions, and subpart. ...(January 3rd, 2019)
• 150018 Mdc Conflat Reducer 6.0 (28.3% similar) Actual picture of item...(November 27th, 2017)