ULVAC Single Phase Oil Rotary Vacuum Pump GLD-202A.

( Brand: Ulvac ), ( Manufacturer Part Number: GLD-202A ), ( Part Type: Oil Vacuum Pump )

Review ULVAC Gld-202a. Gld-202 Single Phase Oil Sealed Rotary Vacuum Pump

The **ULVAC GLD-202A (GLD-202) Single-Phase Oil Rotary Vacuum Pump** is a high-performance, precision-engineered solution designed for demanding laboratory, industrial, and research applications requiring reliable and consistent vacuum performance. Part of ULVAC s renowned GLD series, this compact yet robust pump delivers exceptional efficiency and durability, making it an ideal choice for processes such as material deposition, thin-film coating, chemical vapor deposition (CVD), sputtering, and other low-to-medium vacuum applications. Built with a single-phase motor, the GLD-202A ensures seamless integration into standard electrical systems, offering flexibility for laboratories and production environments where dedicated three-phase power may not be available. Its oil-sealed rotary vane design provides smooth, quiet operation while maintaining stable vacuum levels, typically achieving ultimate pressures as low as **1 10 Torr (10 mTorr)** or better, depending on the specific configuration and downstream load. The pump s robust construction, featuring high-quality stainless steel and precision-machined components, ensures long-term reliability and resistance to corrosion, even in environments exposed to moisture or minor chemical contaminants.

One of the standout features of the GLD-202A is its **adjustable vacuum range**, allowing it to handle a wide variety of applications with ease. Whether used for roughing, backing, or as a primary pump in tandem with turbo or diffusion pumps, this unit excels in maintaining consistent performance across varying workloads. The pump s **oil circulation system** ensures optimal lubrication and heat dissipation, extending the lifespan of internal components and reducing the frequency of maintenance. ULVAC s proprietary **GLD oil**, a high-performance synthetic fluid, is engineered to minimize oil vapor emission, reducing contamination risks in sensitive processes such as semiconductor fabrication or optical coating. The pump s **compact footprint** and modular design further enhance its versatility, making it suitable for integration into existing vacuum systems or as a standalone unit in space-constrained environments.

Safety and ease of use are prioritized in the GLD-202A s design, with features such as **overload protection**, **vibration-dampening mounts**, and a **user-friendly control interface** that simplifies operation. The pump s **single-phase motor** operates efficiently with minimal energy consumption, contributing to cost savings over time while adhering to stringent environmental regulations. Additionally, ULVAC s commitment to quality assurance is evident in the GLD-202A s rigorous testing protocols, ensuring that each unit meets or exceeds industry standards for performance, durability, and reliability. Whether deployed in academic research, industrial manufacturing, or materials science, this vacuum pump delivers the precision, consistency, and longevity required to support critical processes with confidence. With its blend of advanced engineering, adaptability, and ease of maintenance, the GLD-202A stands as a dependable workhorse for professionals demanding excellence in vacuum technology.

The **ULVAC GLD-202A (GLD-202) single-phase oil rotary vacuum pump** is a reliable workhorse for laboratory and industrial applications requiring moderate vacuum levels (typically down to 10 Torr or 1 mbar). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the ULVAC GLD-202A/GLD-202**

1. **Reliability and Durability**

The GLD series is known for its robust construction, using high-quality materials and precision engineering. The oil-sealed rotary vane design is well-proven for continuous operation, making it suitable for long-term use in laboratories, R&D, or small-scale industrial processes. The pump s mechanical components are designed to withstand frequent start-stop cycles without excessive wear.

2. **Consistent Performance**

This pump delivers stable vacuum performance within its specified range (typically 1 10 Torr). The oil bath lubrication system ensures smooth operation and minimizes fluctuations in pressure, which is critical for applications like freeze-drying, thin-film deposition, or sample preparation where consistency matters.

3. **Low Maintenance Requirements**

Compared to dry pumps or other rotary vane models, the GLD-202 requires relatively infrequent maintenance. Oil changes are straightforward (every 1,000 2,000 hours, depending on usage), and the pump s simple design reduces the risk of mechanical failures. The single-phase motor (110V/220V options) also simplifies installation in standard laboratory setups.

4. **Compatibility with Foreline Pumps**

The GLD-202 can be paired with a roughing pump (e.g., a diaphragm or scroll pump) for faster evacuation, extending its utility for applications requiring initial roughing before fine vacuum work. This flexibility makes it adaptable to various setups without requiring a complete overhaul.

5. **Quiet Operation**

Relative to larger industrial pumps, the GLD-202 operates at a moderate noise level ( 60 70 dB at full load), which is acceptable for most laboratory environments. This reduces operator fatigue during prolonged use.

6. **Cost-Effective for Moderate Vacuum Needs**

The pump offers a balance between performance and price, making it a cost-effective choice for users who don t require ultra-high vacuum (UHV) capabilities. Its price point is lower than that of dry pumps or larger oil-sealed models, while still providing reliable service for many applications.

7. **Easy to Install and Use**

The pump is designed with user-friendliness in mind. It includes standard vacuum fittings (e.g., KF or ISO flanges), and the control panel is straightforward, often featuring basic gauges or digital displays for monitoring pressure. No specialized training is typically required for operation.

8. **Backed by ULVAC s Reputation**

ULVAC is a well-established manufacturer with a strong reputation for vacuum technology, particularly in Asia and globally. Their pumps are widely used in academia and industry, and service support is generally available through authorized dealers or the manufacturer.

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### **Cons of the ULVAC GLD-202A/GLD-202**

1. **Oil Contamination Risk**

As an oil-sealed pump, the GLD-202 requires regular oil changes to prevent contamination of the vacuum system. Oil backstreaming can introduce impurities into sensitive processes (e.g., semiconductor manufacturing or high-purity chemical synthesis), requiring additional filtration or trapping systems. This adds complexity and cost to the setup.

2. **Limited Vacuum Range**

The pump s maximum vacuum is typically around 10 Torr (1 mbar), which is insufficient for applications requiring higher vacuums (e.g., UHV or high-vacuum processes like sputtering or electron microscopy). For such applications, a secondary pump (e.g., a turbomolecular or diffusion pump) is needed, increasing system cost and complexity.

3. **Single-Phase Motor Limitations**

The single-phase motor (common in the GLD-202) is less powerful than three-phase motors found in larger industrial pumps. This limits the pump s capacity for heavy-duty or continuous high-load applications. If the system requires frequent high-flow demands, the pump may struggle to maintain performance, leading to overheating or reduced lifespan.

4. **Vibration and Mechanical Noise**

While quieter than some industrial pumps, the GLD-202 can still produce noticeable vibration and mechanical noise, especially at higher loads. This may not be ideal for noise-sensitive environments or when used in conjunction with delicate equipment (e.g., sensitive balances or optical instruments).

5. **Oil Degradation Over Time**

The pump oil degrades with use, absorbing moisture, gases, and contaminants from the system. Over time, this can reduce the pump s efficiency and increase the risk of oil breakdown, leading to carbon deposits or pump failure. Regular oil analysis and replacement are necessary to maintain performance.

6. **Not Ideal for Corrosive or Reactive Gases**

The GLD-202 is not designed for handling highly corrosive or reactive gases (e.g., chlorine, fluorine, or strong acids), as these can degrade the oil and pump materials. For such applications, specialized pumps (e.g., dry pumps or chemically resistant models) are required.

7. **Limited Lifespan Compared to Dry Pumps**

Oil-sealed pumps generally have a shorter lifespan than dry pumps (e.g., scroll or diaphragm pumps) due to oil degradation and wear on moving parts. While the GLD-202 is durable, it may require more frequent maintenance or replacement over time compared to dry alternatives.

8. **Dependence on External Power Supply**

The pump requires a stable power supply (110V or 220V, depending on the model). Fluctuations or power outages can disrupt operation, and the pump lacks built-in fail-safes for extreme voltage variations. Users may need an uninterruptible power supply (UPS) for critical applications.

9. **Disposal and Environmental Concerns**

Oil-sealed pumps contain used vacuum oil that must be disposed of properly to avoid environmental contamination. This adds an administrative burden compared to dry pumps, which produce no hazardous waste.

10. **Higher Operating Costs Long-Term**

While the initial purchase price is reasonable, the long-term costs of oil replacement, maintenance, and potential repairs can add up. Dry pumps, though more expensive upfront, often have lower total cost of ownership over time due to reduced maintenance needs.

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### **Conclusion**

The **ULVAC GLD-202A/GLD-202** is an excellent choice for users requiring a **reliable, mid-range vacuum pump** for laboratory or light industrial applications where moderate vacuum levels (down to 1 mbar) are sufficient. Its strengths lie in its **durability, ease of use, and cost-effectiveness** for routine tasks such as freeze-drying, sample preparation, or basic vacuum processes. However, it is **not suitable** for applications demanding ultra-high vacuum, corrosive gas handling, or continuous heavy-duty operation without additional support systems.

The pump s oil-sealed design, while robust, introduces maintenance requirements and potential contamination risks that must be managed. Users must also consider the need for complementary roughing or secondary pumps if higher vacuum levels are eventually required.

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### **Recommendation**

- You need a **dependable, mid-vacuum pump** for general laboratory use (e.g., freeze-drying, degassing, or basic vacuum processes).

- Your budget is constrained, and you prioritize **affordability and simplicity** over ultra-high vacuum capabilities.

- Your applications do not involve **corrosive or reactive gases**, and you can accommodate oil maintenance.

- You plan to pair it with a roughing pump for faster evacuation when needed.

- You require **ultra-high vacuum (UHV) or high vacuum (HV) levels** (e.g., for thin-film deposition, electron microscopy, or semiconductor processing). In this case, a **turbomolecular pump** or **diffusion pump** paired with a roughing pump would be necessary.

- Your workflow involves **highly corrosive or reactive gases**, which would necessitate a **dry pump** (e.g., scroll or diaphragm pump).

- You need **continuous, heavy-duty operation** with minimal maintenance. A **three-phase industrial pump** or **dry pump** may be more suitable.

- Noise or vibration is a critical concern, as the GLD-202 may not be the quietest option available.

For most **moderate vacuum applications** in laboratories or small-scale industrial settings, the **ULVAC GLD-202A/GLD-202** is a **solid, practical choice** that balances performance, reliability, and cost. However, users should carefully assess their specific needs and potential future requirements to ensure the pump remains the best long-term solution. If in doubt, consulting with a vacuum specialist or comparing it with dry pump alternatives may help make an informed decision.

Details:

Ulvac GLD-202A GLD-202 Single Phase, Oil Sealed Rotary Vacuum Pump.

part #: gld202a price

• $750.00

specifications valvplu:

• brand: Ulvac
• mpn: Gld-202a
• part type: Oil Vacuum Pump

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• class: Standard
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• type: Fixed
• transit: 9-12 Days
• cost: $107.77
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general valvplu:

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

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• city: Santa Clara, California
• # reviews: 526
• rating: 98.6%

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offer valvplu:

• availability: In Stock
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• started: May 9, 2026
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• sold: 0

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