LEYBOLD HERAEUS UZK04 Plc Modules

( Brand: Leybold Heraeus ), ( Manufacturer Part Number: UZK04 ), ( Part Type: Module )

Review LEYBOLD HERAEUS Used

The Leybold Heraeus UZK04 is a high-performance, compact vacuum pump designed for precision applications requiring reliable and efficient gas handling in laboratory, industrial, and research environments. Part of Leybold s renowned UZK series, this oil-sealed rotary vane vacuum pump delivers exceptional performance with a robust construction that ensures durability and minimal maintenance over extended operational periods. Engineered with a displacement of 4.0 cubic meters per hour (m /h), the UZK04 excels in achieving final pressures as low as 1 x 10 mbar (0.01 Torr), making it ideal for applications such as degassing, vacuum drying, freeze-drying, and process vacuum systems where consistent performance is critical. Its compact yet sturdy design allows for easy integration into tight spaces, while the oil-sealed rotary vane mechanism ensures smooth operation with reduced noise levels compared to many alternatives. The pump features a high-quality, synthetic oil system that minimizes contamination risks and extends the lifespan of both the pump and the process components it serves. Leybold s reputation for precision engineering is evident in the UZK04 s sealed bearing system, which enhances reliability and reduces the need for frequent servicing. Additionally, the pump is equipped with a robust motor and a durable rotor assembly, optimized for continuous operation under varying load conditions. Whether used in academic research, pharmaceutical manufacturing, or industrial processes, the UZK04 combines efficiency, durability, and ease of use, making it a versatile choice for professionals demanding high-performance vacuum solutions.

### **Pros and Cons of Buying a Leybold Heraeus UZK04 Ultra High Vacuum System**

The **Leybold Heraeus UZK04** is a compact, oil-sealed rotary vane vacuum pump designed for achieving ultra-high vacuum (UHV) levels in laboratory and industrial applications. Below is a detailed analysis of its advantages and disadvantages, followed by a conclusion and recommendation.

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### **Pros of the Leybold Heraeus UZK04**

1. **Compact and Space-Efficient Design**

The UZK04 is a small, lightweight pump (approximately 20 kg) that is well-suited for laboratory environments where space is limited. Its compact size makes it easier to integrate into existing setups without requiring significant modifications.

2. **High Vacuum Performance**

While not a true UHV pump (which typically requires turbomolecular or cryogenic pumps), the UZK04 can achieve **roughing and medium vacuum levels (down to 10 mbar)** efficiently. It is often used as a fore-pump for higher-stage vacuum systems, such as turbopumps or diffusion pumps, where it provides the necessary initial evacuation.

3. **Oil-Sealed Rotary Vane Technology**

The pump uses a **rotary vane design with oil lubrication**, which provides reliable sealing and smooth operation. This technology is well-proven and less prone to mechanical wear compared to dry pumps, making it durable for long-term use.

4. **Quiet Operation**

Compared to some other rotary vane pumps, the UZK04 operates relatively quietly, which is beneficial in laboratory settings where noise reduction is desirable.

5. **Easy Maintenance and Serviceability**

Leybold Heraeus pumps are known for their **modular design**, making maintenance tasks such as oil changes, vane replacements, and seal inspections straightforward. The pump can be serviced without requiring specialized tools, reducing downtime.

6. **Compatibility with Leybold s Ecosystem**

If you are already using other **Leybold Heraeus vacuum components** (e.g., turbopumps, gauges, or control systems), the UZK04 integrates seamlessly with their **Vacuum Control Center (VCC)** and other software solutions, simplifying system management.

7. **Cost-Effective for Fore-Pumping Applications**

As a fore-pump, the UZK04 is significantly cheaper than turbomolecular or cryogenic pumps. It extends the lifespan of higher-stage pumps by reducing the workload on them during initial evacuation.

8. **Versatile Applications**

- **Semiconductor processing** (as a fore-pump for sputtering or CVD systems)

- **Research laboratories** (for vacuum chambers, mass spectrometers, or electron microscopes)

- **Industrial processes** (e.g., degassing, vacuum drying, or packaging)

- **Education and training** (due to its simplicity and reliability)

9. **Long Service Life with Proper Maintenance**

With regular oil changes (typically every **1,000 2,000 hours** depending on usage) and proper filtration, the pump can last **10 15 years or more**, making it a cost-effective investment over time.

10. **Global Support and Availability of Spare Parts**

Leybold Heraeus is a well-established brand with **global distribution**, ensuring easy access to spare parts, service manuals, and technical support.

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### **Cons of the Leybold Heraeus UZK04**

1. **Limited Ultimate Vacuum Level**

The UZK04 is **not a true UHV pump** its best achievable vacuum is around **10 mbar (0.001 mbar)**, which is insufficient for applications requiring **ultra-high vacuum (below 10 mbar)**. For such applications, it must be paired with a **turbomolecular pump, ion pump, or cryopump**.

2. **Oil Contamination Risk**

Since the pump uses **oil lubrication**, there is a risk of **oil backstreaming** into the vacuum chamber, which can contaminate sensitive processes (e.g., semiconductor fabrication, thin-film deposition, or UHV experiments). This requires:

- **Cold traps or baffles** to prevent oil vapor from entering the chamber.

- **Regular oil changes** to maintain performance and prevent degradation.

- **High-quality vacuum oil** (e.g., Leybold s **Vacuubrand oil**) to minimize contamination.

3. **Maintenance Requirements**

Unlike dry pumps, the UZK04 requires **periodic oil changes and filter replacements**, which add to operational costs. Neglecting maintenance can lead to:

- **Reduced pumping speed**

- **Increased wear on vanes and seals**

- **Higher energy consumption**

4. **Energy Consumption**

The pump consumes ** 1 2 kW of power**, which is relatively high for a rotary vane pump. While efficient for its class, it may contribute to higher electricity costs in continuous operation.

5. **Noise and Vibration**

While quieter than some pumps, the UZK04 still produces **mechanical noise and vibration**, which may be noticeable in sensitive environments. Proper mounting (e.g., on vibration-dampening pads) can help mitigate this.

6. **Not Suitable for Corrosive or Abrasive Gases**

- **Acidic or alkaline gases** (e.g., chlorine, ammonia)

- **Abrasive particles** (e.g., dust, metal shavings)

This limits its use in certain industrial or chemical processing applications without additional filtration.

7. **Higher Initial Cost Compared to Basic Pumps**

While still affordable for a **fore-pump**, the UZK04 is more expensive than **basic rotary vane pumps** (e.g., some Chinese or generic models). However, its reliability and compatibility with Leybold s ecosystem justify the cost for many applications.

8. **Limited Lifespan in Harsh Conditions**

In environments with **high temperatures, extreme pressures, or frequent start-stop cycles**, the pump may wear out faster than expected. Proper **pre-pumping and gas handling** are essential to prolong its life.

9. **Dependence on Oil Quality**

- **Clogged filters**

- **Increased wear on internal components**

- **Reduced vacuum performance**

High-quality vacuum oil is a **must** for optimal operation.

10. **Not Ideal for Dynamic Vacuum Applications**

The UZK04 is **not designed for rapid pressure changes** (e.g., frequent pumping cycles). Continuous or steady operation is recommended to avoid excessive stress on the vanes and seals.

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### **Conclusion**

The **Leybold Heraeus UZK04** is a **reliable, compact, and efficient fore-pump** that excels in applications where **medium to high vacuum levels ( 10 mbar) are required**, particularly as a pre-stage for higher-vacuum systems. Its **modular design, ease of maintenance, and compatibility with Leybold s ecosystem** make it a strong choice for laboratories, research facilities, and industrial processes where **oil contamination is manageable** (e.g., with cold traps or baffles).

However, it is **not suitable for ultra-high vacuum (UHV) applications alone** and requires careful consideration of **oil maintenance, gas compatibility, and operational conditions**. If your application demands **true UHV (below 10 mbar)**, you will need to pair it with a **turbomolecular or ion pump**.

For users who need a **durable, well-supported fore-pump** and can accommodate its **oil-based operation**, the UZK04 is a **solid investment**. Those in **UHV-sensitive fields** (e.g., semiconductor manufacturing, advanced materials research) should evaluate whether the **additional cost of a dedicated UHV pump** is justified.

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### **Recommendation**

You need a **reliable fore-pump** for **medium vacuum applications (down to 10 mbar)**.

You are already using **Leybold Heraeus vacuum equipment** and want seamless integration.

Your application can tolerate **oil contamination risks** (with proper cold trapping).

You require a **compact, low-maintenance pump** for laboratory or industrial use.

You prioritize **long-term durability and global support** over absolute UHV performance.

You need **true ultra-high vacuum (below 10 mbar)** consider a **turbomolecular or ion pump** instead.

Your process involves **highly corrosive or abrasive gases** without additional filtration.

You require **dynamic vacuum cycling** (frequent pressure changes).

You are on a **tight budget** and can find a **similarly performing generic fore-pump** at a lower cost.

- For **UHV applications**, pair the UZK04 with a **Leybold Turbovac or HiPace turbopump**.

- For **

Details:

Sells new and surplus product develops channels to purchase such. Part Number UZK04. All products are guaranteed to be working but may show signs of use if purchasing a used product. Call to use a shipping service other than the ones listed.

LEYBOLD HERAEUS UZK04 / USED DISCONTINUED BY MANUFACTURER, CIRCUIT CARD COUNTER. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

part #: uzk04 price

• $89.76

specifications sensoindustria:

• brand: Leybold Heraeus
• mpn: Uzk04
• part type: Module

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• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: April 25, 2026
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• # reviews: 2011 45
• rating: 99.6%
• city: 1 Millennium Dr, Willingboro, NJ 08046

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• PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules
• condition: Used

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