LEYBOLD TRIVAC 140081 Dual Rotary Vane Vacuum Pump D4B 3.4CFM KF16 240VAC

( Brand: Leybold Trivac ), ( Manufacturer Part Number: 140081 ), ( Part Type: Vacuum Pump )

Review LEYBOLD TRIVAC D4b Dual Stage Rotary Vane Vacuum Pump 3.4cfm 240vac

The **Leybold TRIVAC 1400-81 D4B Dual Rotary Vane Vacuum Pump (3.4 CFM, KF16, 240VAC)** is a high-performance, oil-sealed rotary vane vacuum pump designed for precision applications requiring reliable and consistent vacuum performance in laboratory, industrial, and manufacturing environments. Engineered with Leybold s signature engineering excellence, this pump combines robust construction with advanced vane technology to deliver exceptional suction power and durability, making it an ideal choice for processes such as degassing, vacuum distillation, freeze-drying, and semiconductor manufacturing. The dual-rotor design enhances efficiency by reducing pulsation and improving smooth operation, while the oil-sealed mechanism ensures long-term reliability by maintaining a tight seal between the vanes and the pump housing, minimizing air ingress and maximizing vacuum stability. With a nominal pumping speed of **3.4 cubic feet per minute (CFM)** at atmospheric inlet pressure, this pump efficiently handles moderate to high-volume applications, accommodating a KF16 (ISO-KF40) flange connection for seamless integration with vacuum systems, chambers, or process equipment. The **240VAC** power requirement ensures compatibility with standard industrial power supplies, while the compact yet sturdy construction optimizes space utilization without compromising performance. Built to withstand continuous operation, the TRIVAC 1400-81 D4B features a robust motor and precision-machined components that resist wear, ensuring extended service life and reduced maintenance demands. Whether used in research laboratories for analytical instrumentation, pharmaceutical production for sterile processing, or industrial settings for material processing, this pump delivers consistent, high-quality vacuum performance with minimal noise and vibration, reinforcing its reputation as a dependable workhorse in vacuum technology.

### **Pros and Cons of buying a Leybold TRIVAC 140081 D4B Dual Rotary Vane Vacuum Pump (3.4 CFM, KF16, 240VAC)**

1. **High Performance and Efficiency** The dual rotary vane design provides excellent pumping speed (3.4 CFM) and low ultimate pressure ( 10 mbar), making it suitable for applications requiring precise vacuum control, such as laboratory processes, thin-film deposition, or small-scale industrial systems.

2. **Reliable and Durable Construction** Leybold is a well-established brand known for high-quality vacuum technology. The D4B model features robust materials, precise engineering, and long-term reliability, reducing the risk of frequent breakdowns.

3. **Versatile Compatibility** The KF16 flange standard ensures compatibility with a wide range of vacuum chambers, fittings, and accessories, making it adaptable for various applications without requiring custom modifications.

4. **Energy Efficiency** As a rotary vane pump, it operates efficiently within its specified range, consuming moderate power (240VAC) while maintaining consistent performance without excessive heat generation.

5. **Low Maintenance Requirements** Compared to some other vacuum pump types (e.g., turbomolecular pumps), rotary vane pumps generally require less frequent servicing, though oil changes and filter replacements are still necessary.

6. **Cost-Effective for Mid-Range Applications** While not the cheapest option, it strikes a balance between performance and price, making it a practical choice for laboratories, research facilities, or small manufacturing setups where high precision is needed.

7. **Quiet Operation** Relative to larger industrial pumps, the D4B operates at a moderate noise level, which is beneficial for laboratory environments where noise reduction is desirable.

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1. **Oil-Based Operation** Like most rotary vane pumps, this model requires oil lubrication, which means periodic oil changes (typically every 1,000 2,000 hours) to maintain performance and prevent contamination of the vacuum system. Oil degradation can also introduce particulate matter if not managed properly.

2. **Limited Ultimate Pressure** While sufficient for many applications, the ultimate pressure ( 10 mbar) may not be adequate for ultra-high-vacuum (UHV) or high-purity processes that require pressures below 10 mbar. For such cases, additional pumps (e.g., turbopumps) would be necessary.

3. **Sensitivity to Contaminants** Oil-based pumps can be susceptible to damage from moisture, gases with reactive properties (e.g., oxygen, chlorine), or particulate matter. Proper filtration and dry nitrogen purging may be required in corrosive environments.

4. **Vibration and Mechanical Noise** While quieter than some industrial pumps, it may still produce noticeable vibration and mechanical noise, which could be a concern in sensitive or noise-restricted environments.

5. **Size and Installation Space** The pump is not compact, requiring dedicated space for installation, cooling (if air-cooled), and maintenance access. This may be a limitation in tight laboratory or workshop setups.

6. **Power Dependency** Operating on 240VAC means it requires a stable electrical supply. Fluctuations or power outages could disrupt operations, and a backup generator or UPS may be needed for critical applications.

7. **Resale Value and Parts Availability** While Leybold is reputable, older models may have limited aftermarket support or spare parts availability compared to newer or more commonly used pumps. Always verify supplier reliability before purchase.

8. **Not Ideal for High-Gas-Load Applications** For processes with high gas loads (e.g., aggressive chemicals or large volumes of air), a larger or more advanced pump (e.g., a dry pump or scroll pump) might be more suitable to avoid overheating or reduced efficiency.

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The Leybold TRIVAC 140081 D4B dual rotary vane vacuum pump is a **strong, mid-range vacuum solution** well-suited for laboratories, research applications, and small-scale industrial processes requiring reliable, oil-lubricated vacuum performance. Its strengths lie in its **durability, compatibility, and efficiency** for moderate vacuum demands, while its **oil maintenance requirements, ultimate pressure limitations, and size** are key considerations.

- Need a **cost-effective, high-quality vacuum pump** for general laboratory or production use.

- Can accommodate **periodic oil changes and basic maintenance**.

- Require **KF16 compatibility** with existing systems.

- Operate in environments where **ultimate pressures of 10 mbar are sufficient**.

- **Ultra-high-vacuum (UHV) or high-purity applications**.

- **Frequent exposure to corrosive or reactive gases**.

- **Compact or noise-sensitive setups** without additional soundproofing.

- **Zero-maintenance operation** (oil changes are mandatory).

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- You need a **reliable, mid-range vacuum pump** for laboratory, research, or small industrial use.

- Your application does not require **ultra-high vacuum** or extreme gas loads.

- You are prepared for **regular oil maintenance** and can ensure proper filtration to protect the pump.

- Compatibility with **KF16 flanges** is a priority.

- You require **ultra-high vacuum (UHV)** in which case a **turbomolecular pump** or **ion pump** would be necessary.

- Your environment involves **aggressive or corrosive gases** a **dry pump (e.g., scroll pump)** or **chemical-resistant model** may be better.

- You need **higher pumping speeds or lower noise levels** larger rotary vane pumps or dry pumps might be more appropriate.

- Budget constraints are tight **used or refurbished pumps** from reputable suppliers could offer cost savings.

**Final Verdict:** For most **general-purpose vacuum applications** where oil-lubricated performance is acceptable, the Leybold TRIVAC D4B is a **solid, well-engineered choice** that balances performance, reliability, and cost effectively. Ensure you factor in maintenance requirements and system compatibility before purchasing.

Details:

Ultimate Pressure: 10-4 MBA. Inlet Outlet: KF16. Pumping Speed: 3.4 cfm 4m /h. Full size truck access and forklift is acceptable.

This is a surplus item. Leybold Trivac. Specifications: model #: 140081.

part #: 140081 prices

• $245.00-$400.00

specifications valvplu:

• brand: Leybold Trivac
• mpn: 140081
• part type: Vacuum Pump

seller valvplu:

• rating: 100.0%
• # reviews: 43641
• city: Osseo, Minnesota

returns valvplu:

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

offer valvplu:

• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: February 17, 2026
• sold: 0
• best offers: True

payments valvplu:

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

general valvplu:

• Pumps Pump Accessories > Vacuum Pumps > Rotary Vane Pumps
• condition: Used

shipping valvplu:

• type: Fixed
• class: Freight
• service: Flat Rate Freight
• cost: $0.00

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