AGILENT VARIAN 698905M002 Torr Turbo Turbomolecular High Uhv Pump E-7 TV-81 81-T Vacuum

( Brand: Agilent Varian ), ( Manufacturer Part Number: 698905M002 ), ( Part Type: Vacuum Pump ), ( Inlet Flange: Dn 63 ), ( Unit Type: Unit ), ( Maximum Flow Rate: 77 L/s Nitrogen ), ( Outlet Flange: Dn 16 ), ( Country Of Origin: Italy )

Review AGILENT VARIAN Tested E-7 Torr Turbo v 81-t Turbomolecular High Vacuum Pump Uhv

The **Agilent Varian 698905-M002 E-7 Torr TV-81 Turbo-V 81-T Turbomolecular High Vacuum Pump** is a high-performance, ultra-high vacuum (UHV) solution engineered for precision applications requiring exceptional pumping speeds, reliability, and durability. Part of Varian s renowned Turbo-V series, this turbomolecular pump is specifically designed to achieve and maintain vacuum levels as low as **10 Torr (10 Pa)**, making it an ideal choice for demanding environments such as semiconductor manufacturing, surface science research, thin-film deposition, electron microscopy, and advanced materials characterization. The **TV-81-T** model leverages a **three-stage turbomolecular pumping mechanism**, combined with a **forevacuum system** that ensures rapid and efficient gas removal, significantly reducing the time required to reach and sustain ultra-high vacuum conditions. Its **ceramic-coated rotor and stator** enhance longevity by minimizing wear and friction, while the **high-speed (up to 120,000 RPM)** operation delivers superior pumping speeds exceeding **81 liters per second (l/s) for nitrogen (N )** while maintaining low noise levels and minimal vibration, critical for sensitive instrumentation. The pump s **E-7 Torr** designation underscores its capability to handle trace gas loads with precision, ensuring consistent performance even in partial pressure environments where residual gases must be meticulously controlled. Built with **high-temperature-resistant materials**, including **ceramic bearings and a robust oil-free design**, this turbomolecular pump eliminates the risk of contamination from lubricants, a common concern in UHV applications. Additionally, its **modular and compact footprint** allows for seamless integration into existing vacuum systems, while the **user-friendly control interface** simplifies operation and monitoring. Whether used in academic research, industrial R&D, or high-precision manufacturing, the **Agilent Varian 698905-M002** represents a pinnacle of turbomolecular pump technology, offering unmatched efficiency, reliability, and performance in the pursuit of ultra-high vacuum environments.

### **Pros and Cons of buying a Agilent Varian 698905M002 E-7 Torr TV-81 Turbo-V 81-T UHV Pump**

#### **Pros**

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

- The pump is designed for UHV applications, achieving pressures as low as **1 10 Torr**, making it ideal for scientific research, semiconductor manufacturing, and surface science experiments where contamination-free environments are critical.

2. **High Reliability and Durability**

- Varian (now part of Agilent) has a long-standing reputation for manufacturing robust turbomolecular pumps used in demanding laboratory settings. The TV-81 series is known for its durability, especially in continuous operation.

3. **Compatibility with Agilent Varian Systems**

- If you already own or plan to integrate other Agilent Varian equipment (e.g., mass spectrometers, gas chromatographs, or surface analysis tools), this pump will seamlessly fit into your existing setup, reducing compatibility issues.

4. **Low Maintenance Requirements**

- Turbo pumps generally require less maintenance than cryogenic or diffusion pumps, as they do not rely on cooling fluids or replaceable components like oil traps (in older designs). The TV-81 uses a dry-sealed rotor design, reducing wear and tear.

5. **High Pumping Speed**

- The TV-81 series provides excellent pumping speeds for gases like nitrogen, argon, and hydrogen, which is essential for rapid chamber evacuation in applications such as thin-film deposition, sputtering, or electron microscopy.

6. **Modular and Upgradable**

- Some Varian turbopumps allow for upgrades or modifications (e.g., adding a fore-pump or changing the rotor design), extending their lifespan and adaptability to future needs.

7. **Used Market Availability**

- Since this is a well-established model, you can often find it in the **used market at a fraction of the original cost**, making it a cost-effective option for researchers or labs on a budget.

---

#### **Cons**

1. **High Initial Cost (New Unit)**

- A **new** Agilent Varian TV-81 pump can be expensive, often ranging between **$20,000 and $40,000 **, depending on configuration and accessories. This may be prohibitive for small labs or individual researchers.

2. **Depreciation Over Time**

- Like most high-end scientific equipment, turbomolecular pumps depreciate significantly after a few years. If you plan to sell it later, the resale value may not recover the full purchase cost.

3. **Power and Cooling Requirements**

- Turbo pumps require **significant electrical power (typically 3 5 kW)** and proper **cooling (water or air-cooled)**. Poor cooling can lead to overheating and reduced performance or lifespan.

- Some older models may lack modern energy-efficient features, increasing operational costs.

4. **Sensitivity to Contamination**

- While designed for UHV, **oil backstreaming (if using oil-sealed bearings) or particulate contamination** can degrade performance over time. Regular maintenance (e.g., bearing replacements) is necessary to prevent downtime.

5. **Limited Lifespan of Bearings**

- The **magnetic bearings** in turbo pumps (if not properly maintained) can wear out after **10,000 20,000 hours** of operation, requiring costly replacements. Oil-lubricated bearings may last longer but introduce contamination risks.

6. **Complex Installation and Calibration**

- Setting up a turbomolecular pump requires **proper alignment, vacuum system integration, and calibration**, which may necessitate professional assistance. Improper installation can lead to inefficiencies or damage.

7. **Potential for Counterfeit or Refurbished Issues**

- If purchasing **used**, there is a risk of buying a **counterfeit, improperly refurbished, or damaged unit**. Always verify the pump s history, service records, and test results before purchase.

8. **Noise and Vibration**

- Turbo pumps can generate **significant noise (60 80 dB)** and vibration, which may require **acoustic enclosures or vibration isolation** in sensitive applications (e.g., microscopy).

---

### **Ending Conclusion**

The **Agilent Varian 698905M002 TV-81 Turbo-V 81-T UHV pump** is a **high-performance, reliable workhorse** for ultra-high vacuum applications, particularly in **research labs, semiconductor manufacturing, and surface science**. Its **low maintenance requirements, compatibility with Agilent systems, and availability in the used market** make it an attractive option for those needing **consistent, high-vacuum performance**.

However, the **high upfront cost (especially for new units), power requirements, sensitivity to maintenance, and potential long-term bearing issues** must be carefully considered. If budget allows, a **new unit with extended warranty** may be ideal for critical applications, while a **well-maintained used pump** can offer excellent value for cost-conscious buyers.

### **Recommendation**

- You have a **dedicated budget** and require **long-term reliability** with **full warranty support**.

- Your application demands **peak performance** (e.g., cutting-edge research, high-end semiconductor processing).

- You plan to **integrate it with other Agilent Varian systems** for seamless operation.

- You are working within a **tight budget** and can **verify the pump s service history** (look for **less than 10,000 hours** of operation).

- The pump is **properly refurbished** by a reputable vendor (check for **new bearings, seals, and vacuum testing**).

- You are willing to **perform regular maintenance** to extend its lifespan.

- You cannot **commit to proper installation and maintenance** (risk of premature failure).

- Your application does **not strictly require UHV** (a lower-cost turbopump or dry pump may suffice).

- You suspect the seller is **not transparent about the pump s condition** (always request **vacuum performance data**).

**Final Verdict:** This pump is a **strong choice for serious UHV applications**, but **due diligence in sourcing (especially for used units) and maintenance planning** is essential to maximize its value and longevity.

Details:

Included: Varian Turbo-V 81-T turbomolecular pump. Part Number: 698905M002. Turbo pump cable that runs from controller to the turbo body. Start-up time.

Pump and controller have been tested run properly; system achieved 5E-7 Torr in our setup, we ran it for about 6 hours. Does not include any of the gauges or fittings from our test stand: those were to demonstrate performance only. High-performance turbomolecular pump package for high and ultra-high vacuum systems. TESTED 5E-7 Torr: Varian Turbo-V 81-T Turbomolecular High Vacuum Pump UHV Includes TV81AG-NAV Navigator Controller / Power Supply.

part #: 698905m002 prices

• $799.20-$2900.00

specifications valvplu:

• brand: Agilent Varian
• mpn: 698905m002
• part type: Vacuum Pump
• inlet flange: Dn 63
• unit type: Unit
• maximum flow rate: 77 L/s Nitrogen
• outlet flange: Dn 16
• country of origin: Italy

returns valvplu:

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

seller valvplu:

• rating: 99.8%
• # reviews: 2808
• city: Fargo, North Dakota

payments valvplu:

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

general valvplu:

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

offer valvplu:

• sold: 0
• availability: In Stock
• quantity: 1
• best offers: True
• options: Ship-to-home
• started: February 3, 2026

shipping valvplu:

• class: Standard
• transit: 3-7 Days
• type: Fixed
• cost: $0.00
• service: Standard

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