1. Valves And Flow Controls Industrial Automation Control For Sale
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  3. LEYBOLD 350/30I

LEYBOLD 350-30I Turbovac 350/30I P/n 709-809-440 PLM1

709-809-440 Leybold 350/30i Turbovac P/n Plm1

( Brand: Leybold ), ( Manufacturer Part Number: 350/30I )

Review LEYBOLD 350/30i Turbovac P/n

The **Leybold 350/30i TURBOVAC** with part number **709-809-440 PLM1** is a high-performance, compact turbomolecular pumping unit designed for demanding applications in vacuum technology, particularly where precision, reliability, and efficiency are critical. This advanced turbopump integrates Leybold s proven **350/30i** series technology, optimized for achieving ultra-high vacuum (UHV) levels with exceptional speed and stability. The **PLM1** variant features a **hybrid design**, combining a **ceramic-coated rotor** with a **high-speed permanent magnet motor**, ensuring superior durability, reduced maintenance, and enhanced energy efficiency compared to traditional turbopumps. With a **nominal pumping speed of 350 liters per second for nitrogen (N ) at 10 mbar**, this unit excels in applications such as semiconductor manufacturing, thin-film deposition, surface analysis, and research environments where rapid evacuation and stable vacuum conditions are essential.

The **709-809-440 PLM1** is equipped with Leybold s **iCON** control system, which provides intuitive operation, real-time monitoring, and advanced diagnostic tools via a user-friendly interface. This system allows for precise parameter adjustments, including **gas ballast control**, **auto-start/stop functionality**, and **vacuum leak detection**, ensuring optimal performance across varying workloads. The pump s **ceramic-coated rotor** minimizes wear and extends operational lifespan, while its **low-vibration design** reduces mechanical stress on connected systems, making it ideal for sensitive applications where stability is paramount. Additionally, the **compact and modular construction** of the 350/30i series allows for easy integration into existing vacuum chambers, with flexible mounting options and compatibility with standard flange sizes.

For enhanced safety and reliability, the **PLM1** includes **Leybold s patented gas handling technology**, which prevents backstreaming and ensures efficient pumping of a wide range of gases, including reactive and corrosive substances. The pump s **automatic gas ballast system** dynamically adjusts to varying gas loads, maintaining optimal performance without manual intervention. Furthermore, the **energy-efficient motor** reduces operational costs while delivering consistent high-speed performance, making it a cost-effective solution for both industrial and research applications. With its **low noise output** and **minimal heat generation**, the 350/30i TURBOVAC PLM1 is well-suited for environments where noise and thermal management are concerns. Overall, this turbopump represents a cutting-edge solution for achieving ultra-high vacuum levels with unmatched precision, efficiency, and longevity.

### **Pros and Cons of buying a Leybold 350/30i Turbovac (P/N 709-809-440, PLM1)**

#### **Pros**

1. **High Performance and Efficiency**

- The Leybold 350/30i is a robust turbomolecular pump designed for high-vacuum applications, capable of achieving ultimate pressures in the **10 to 10 mbar** range, depending on the backing pressure and configuration.

- It features a **350 mm pumping speed at nitrogen (N )**, making it suitable for medium to large chamber applications, such as thin-film deposition, semiconductor processing, or analytical instruments.

- The **PLM1 (Permanent Magnet Motor)** version eliminates the need for external power supplies for the motor, reducing complexity and improving reliability in some setups.

2. **Durability and Longevity**

- Leybold (now part of **HiPace Group**) is a well-established manufacturer with a strong reputation for vacuum technology, offering pumps with **long service life** when properly maintained.

- The **ceramic bearings** (in this model) are known for their durability and resistance to wear, reducing the need for frequent replacements.

- The **stainless steel construction** ensures resistance to corrosion and high-temperature environments.

3. **Compatibility and Integration**

- The pump is designed to work with **Leybold s Vacuum Control System (VCS)** and other industry-standard interfaces, making it easy to integrate into existing setups.

- It is compatible with **Leybold s roughing pumps (e.g., dry screw or diaphragm pumps)** for efficient pumping sequences.

- The **NWFL (Nitrogen Leak Detection)** option (if available) can be added for leak detection, improving system reliability.

4. **Energy Efficiency**

- The **PLM1 permanent magnet motor** reduces power consumption compared to traditional motor-driven turbopumps, as it does not require an external motor controller.

- The pump is designed for **low vibration**, which is beneficial for sensitive applications like electron microscopy or precision coating.

5. **After-Sales Support and Spare Parts Availability**

- Leybold (now HiPace) has a **global network of service centers**, ensuring easy access to spare parts, maintenance, and technical support.

- The pump s design is well-documented, with **clear maintenance procedures** available from the manufacturer.

---

#### **Cons**

1. **High Initial Cost**

- The Leybold 350/30i is a **mid-to-high-end turbopump**, with prices typically ranging from **$15,000 to $25,000 USD**, depending on configuration and additional options.

- Compared to **budget turbopumps (e.g., some Chinese or generic brands)**, this model is significantly more expensive.

2. **Maintenance and Repair Costs**

- While durable, **ceramic bearings and rotor seals** can wear out over time and may require **specialized replacement parts**, increasing long-term costs.

- If not properly maintained, **contamination (e.g., oil backstreaming in hybrid systems, though this model is oil-free)** can degrade performance.

- **Service contracts** from Leybold/HiPace can be costly, though they may be necessary for critical applications.

3. **Size and Installation Complexity**

- The pump is **bulky (approximately 400 mm in diameter and 600 mm in length)**, requiring adequate space in the vacuum chamber or pumping station.

- Installation may require **custom mounting flanges** (e.g., CF, ISO-K, or custom sizes), adding to setup costs.

- **Vibration isolation** may be needed for sensitive applications, increasing system complexity.

4. **Limited Lifespan Compared to Some Alternatives**

- While durable, **turbomolecular pumps have finite lifespans**, typically **100,000 to 300,000 hours** depending on usage and maintenance.

- If the pump is used in **aggressive environments (e.g., high chemical exposure, frequent thermal cycling)**, its lifespan may be shortened.

- **Oil-free turbopumps (e.g., dry screw turbopump hybrid systems)** may offer longer service intervals in some cases, though they can be more expensive to operate.

5. **Dependence on Leybold/HiPace Ecosystem**

- Some users report **proprietary components** (e.g., certain sensors or control modules) that may not be easily replaceable with third-party parts.

- If the manufacturer s support network weakens (as has happened with some vacuum companies), **long-term availability of parts and service** could become an issue.

6. **Potential for Contamination Risks**

- While the **350/30i is an oil-free turbopump**, **hybrid systems (e.g., turbopump roughing pump)** can still introduce contamination risks if not properly maintained.

- **Backstreaming gases** (though minimal in oil-free designs) can occur if the pump is not properly baked or if seals degrade.

---

### **Ending Conclusion**

The **Leybold 350/30i Turbovac (P/N 709-809-440, PLM1)** is a **high-performance, reliable turbomolecular pump** well-suited for **medium to large vacuum chambers** in applications such as **semiconductor processing, thin-film deposition, analytical instruments, and research laboratories**. Its **durability, efficiency, and compatibility with Leybold s ecosystem** make it a strong choice for users who prioritize **long-term performance and support**.

However, the **high upfront cost, maintenance requirements, and potential long-term expenses** (spare parts, service contracts) mean it is **not the best choice for budget-conscious or low-volume applications**. Users should carefully assess whether the **performance benefits outweigh the costs** compared to alternatives like **lower-cost turbopumps, dry screw pumps, or hybrid systems**.

---

### **Recommendation**

**Buy the Leybold 350/30i if:**

You require **high pumping speed (350 mm /s at N )** for **medium to large chambers**.

Your application demands **ultra-high vacuum (UHV) or high vacuum (HV) with low outgassing**.

You operate in an **industry or research field where Leybold/HiPace support and spare parts are readily available**.

You can **justify the cost** based on **long-term reliability and reduced downtime**.

You need **permanent magnet operation (PLM1)** for simplified wiring in your setup.

**Consider alternatives if:**

Your budget is **strictly limited** explore **lower-cost turbopumps (e.g., Edwards RV, Pfeiffer HiPace)** or **hybrid dry screw turbopump systems**.

Your application is **low-volume or intermittent** a **used or refurbished turbopump** may be a cost-effective option.

You require **extreme durability in harsh environments** evaluate **dry screw pumps or cryopumps** as complementary solutions.

You prefer **non-proprietary components** some **open-source or third-party turbopumps** may offer more flexibility.

**Final Verdict:**

For **high-reliability, medium-to-large vacuum systems where cost is not the primary concern**, the **Leybold 350/30i is an excellent choice**. However, **prospective buyers should conduct a thorough cost-benefit analysis**, considering **total ownership costs (purchase, maintenance, downtime)** before committing. If possible, **test or demo the pump in your specific application** to ensure it meets performance expectations.

Details:

Used items have a 30-day return. Acquired from a reliable source. No cords included. Appears to be new in an open box.

part #: 35030i price

  • $1500.00

specifications valvplu:

  • brand: Leybold
  • mpn: 350/30i

general valvplu:

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

returns valvplu:

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

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  • city: Bosque Farms, New Mexico
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shipping valvplu:

  • service: USPS Ground Advantage
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  • cost: $74.41
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offer valvplu:

  • best offers: True
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  • quantity: 1
  • availability: In Stock
  • started: March 2, 2026
category: business & industrial > pumps pump accessories > vacuum pumps > turbomolecular pumps, sku: 11647335358142663,
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  • Used. Offer #1 priced at $1500.00 + $74.41 shipping estimate = $1574.41* total. No cords included Appears to be new in an open box.+$74.41 shipping

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