DRESSER 6-1800 Dpd Water Cooled Diffusion Pump Oil Sec DC-704 L/sec
( Brand: Dresser ), ( Manufacturer Part Number: 6-1800 ), ( Part Type: Oil Pump ), ( Fluid Charge: Dc-704 Oil ), ( Cooling Method: Water-cooled ), ( Inlet Flange Diameter: 6 In ), ( Pumping Speed: 1800 L/sec )
Review DRESSER Dpd Inch Water cooled Diffusion Pump Oil 1800 L/sec
The **6-1800 DPD Water-Cooled Diffusion Pump (Model DPD-704, Oil Capacity: 1800 L/sec)** is a high-performance, industrial-grade vacuum system designed for demanding applications requiring ultra-high vacuum (UHV) and precise control in research, semiconductor fabrication, thin-film deposition, and materials science environments. Engineered with advanced diffusion pump technology, this unit leverages a robust **water-cooled diffusion system** to efficiently evacuate gases and contaminants from chambers, ensuring exceptional pumping speeds of **1800 liters per second** ideal for large-volume or high-throughput processes where rapid and reliable vacuum generation is critical. The **DPD-704** incorporates a **direct drive (DPD) mechanism**, eliminating the need for traditional rotary vane or mechanical seals, which reduces maintenance requirements and extends operational lifespan while maintaining consistent performance under continuous use.
At its core, this diffusion pump operates using a **high-boiling-point diffusion fluid** (typically a silicone or fluorinated oil) that vaporizes and condenses within the pump s internal chambers, creating a high-velocity vapor stream that carries gases away from the vacuum chamber. The **water-cooled design** ensures optimal thermal management, preventing overheating and thermal degradation of the diffusion oil, which is essential for maintaining long-term efficiency and preventing oil degradation that could compromise vacuum integrity. The **integrated cooling system** also enhances the pump s ability to handle high thermal loads, making it suitable for applications involving high-energy processes such as sputtering, evaporation, or plasma etching.
The **6-1800 DPD** is constructed from **high-grade stainless steel and precision-machined components**, ensuring durability, corrosion resistance, and compatibility with aggressive process gases. Its **modular and compact footprint** allows for seamless integration into existing vacuum systems, whether in laboratory setups, production lines, or specialized research facilities. The pump s **direct drive system** eliminates the need for external mechanical linkages, reducing wear and tear while improving reliability. Additionally, the **adjustable diffusion nozzle** enables fine-tuning of the pumping speed to match specific application requirements, enhancing versatility across a wide range of industrial and scientific processes.
For applications requiring **ultra-high vacuum (UHV) levels**, the **DPD-704** can be paired with a **forepump system** (such as a turbomolecular or dry screw pump) to achieve pressures as low as **10 -9 to 10 -10 Torr**, making it indispensable for sensitive experiments in surface science, nanotechnology, or semiconductor manufacturing. The pump s **low outgassing characteristics** and **minimal oil vapor contamination** further ensure that the vacuum chamber remains pristine, reducing the risk of cross-contamination and preserving the integrity of delicate processes.
Maintenance of the **6-1800 DPD** is streamlined thanks to its **easy-access design**, allowing for quick oil changes and internal inspections without requiring extensive disassembly. The **water-cooling system** is designed for efficient heat dissipation, reducing energy consumption while maintaining optimal operating temperatures. Furthermore, the pump s **digital or analog control interfaces** (depending on the model configuration) enable precise regulation of diffusion fluid temperature and flow, ensuring consistent performance and adaptability to varying workloads.
Whether deployed in **academic research laboratories, semiconductor fabrication plants, or advanced materials testing facilities**, the **6-1800 DPD Water-Cooled Diffusion Pump (DPD-704, 1800 L/sec)** represents a pinnacle of vacuum technology combining **high pumping efficiency, durability, and precision** to meet the most exacting demands of modern scientific and industrial applications. Its **reliability, low maintenance requirements, and superior performance** make it an indispensable asset for any operation requiring **ultra-high vacuum capabilities** with minimal operational downtime.
### Pros and Cons of buying a **DPD 6-1800 DPD Water-Cooled Diffusion Pump (DC-704 Oil, 1800 L/sec)**
#### **Pros**
1. **High Pumping Speed (1800 L/sec)**
- Ideal for applications requiring rapid evacuation, such as vacuum coating, thin-film deposition, or high-vacuum processes where efficiency is critical.
2. **Water-Cooled Design**
- Eliminates the need for external oil cooling systems, reducing maintenance complexity and improving reliability in continuous operation.
- More environmentally friendly than air-cooled models, as it avoids heat buildup in enclosed spaces.
3. **DC-704 Diffusion Pump Oil**
- DC-704 is a high-performance diffusion pump oil known for its low vapor pressure, long service life, and resistance to thermal degradation.
- Provides better ultimate vacuum levels compared to lower-grade oils, reducing contamination risks in sensitive applications.
4. **Durability and Longevity**
- Water-cooled systems generally have a longer operational lifespan due to reduced thermal stress on components.
- The robust construction of diffusion pumps like this model ensures stability under high-vacuum conditions.
5. **Compatibility with Modern Vacuum Systems**
- Suitable for integration with turbomolecular pumps, roughing pumps, and other high-vacuum components in advanced research or industrial setups.
- Works well in applications requiring precise control, such as semiconductor manufacturing or optical coating.
6. **Lower Maintenance Compared to Oil-Sealed Rotary Pumps**
- Diffusion pumps do not require frequent oil changes (though DC-704 still needs periodic replenishment) and have fewer moving parts prone to wear.
7. **Consistent Performance**
- Once properly maintained, diffusion pumps deliver stable pumping performance over extended periods, making them reliable for long-term projects.
---
#### **Cons**
1. **High Initial Cost**
- Water-cooled diffusion pumps with high pumping speeds and premium oil (like DC-704) are significantly more expensive than basic rotary or diaphragm pumps.
- Additional costs may include water-cooling infrastructure, backup pumps, and maintenance contracts.
2. **Oil Contamination Risks**
- Diffusion pumps rely on oil vapor to create the vacuum, which can backstream into the chamber if not properly maintained.
- Requires regular oil changes (typically every 1,000 2,000 hours) and careful handling to prevent cross-contamination in sensitive applications (e.g., semiconductor or pharmaceutical processes).
3. **Limited Ultimate Vacuum Compared to Turbomolecular Pumps**
- While excellent for roughing and medium vacuum, diffusion pumps typically cannot achieve the ultra-high vacuum (UHV) levels (
- May require additional pumping stages (e.g., ion pumps) for applications needing extreme vacuums.
4. **Water Dependency**
- Requires a stable water supply for cooling, which may not be available in all lab or industrial settings.
- Water quality (e.g., minerals, bacteria) can affect pump performance if not properly filtered.
5. **Maintenance Complexity**
- Oil changes, baffle cleaning, and pump disassembly are labor-intensive and may require specialized training.
- Leaks or oil degradation can lead to downtime if not monitored closely.
6. **Environmental and Safety Concerns**
- Diffusion pump oil (even DC-704) is flammable and toxic if mishandled, requiring proper disposal and ventilation.
- Water-cooling systems must be leak-proof to avoid electrical hazards or water damage to equipment.
7. **Not Ideal for Reactive Gases**
- Diffusion pumps are less effective with reactive gases (e.g., oxygen, fluorine) that can degrade the oil or damage the pump internals.
- May require additional gas handling systems (e.g., cryopumps) for such applications.
8. **Energy Consumption**
- High-pumping-speed diffusion pumps consume significant power, increasing operational costs compared to lower-power alternatives like diaphragm pumps.
---
### **Conclusion**
The **DPD 6-1800 water-cooled diffusion pump with DC-704 oil** is a powerful and efficient choice for applications demanding high pumping speeds and reliable medium-to-high vacuum performance. Its water-cooled design and premium oil enhance durability and reduce maintenance burdens compared to air-cooled or lower-grade pumps. However, the high upfront cost, potential contamination risks, and limitations in ultra-high vacuum applications must be carefully considered.
This pump is **best suited for**:- Industrial vacuum coating (e.g., decorative or functional coatings).
- Thin-film deposition in research labs.
- Medium-vacuum processes where oil backstreaming is manageable.
- Applications where water cooling is available and maintenance can be consistently performed.
It is **less ideal for**:- Ultra-high vacuum (UHV) or cleanroom environments where oil contamination is unacceptable.
- Settings with unreliable water supply or poor ventilation.
- Budget-conscious operations where lower-cost pumps (e.g., turbomolecular or diaphragm pumps) could suffice.
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### **Recommendation**
**Buy this pump if:**- Your application requires **1800 L/sec pumping speed** and can tolerate oil backstreaming.
- You have **access to stable water cooling** and can maintain the pump properly.
- Budget constraints allow for the **higher initial cost** and operational expenses.
- The process does not involve **reactive gases or UHV requirements**.
**Consider alternatives if:**- You need **ultra-high vacuum (UHV) or cleanroom compatibility** opt for a **turbomolecular pump ion pump combo**.
- Your budget is limited evaluate **lower-cost diffusion pumps with less oil** or **diaphragm pumps** for roughing.
- Water cooling is unavailable a **high-performance rotary pump or cryopump** may be more practical.
For most **medium-to-high vacuum industrial or research applications**, this pump is a **strong, reliable choice** when used correctly. However, weigh the trade-offs carefully against your specific needs before purchasing.
Details:
Dresser DPD 6-1800 6 Water-Cooled Diffusion Pump DC-704 Oil 1800 L/sec.
part #: 61800 price
- $4000.00
specifications valvplu:
- brand: Dresser
- mpn: 6-1800
- part type: Oil Pump
- fluid charge: Dc-704 Oil
- cooling method: Water-cooled
- inlet flange diameter: 6 In
- pumping speed: 1800 L/sec
payments valvplu:
- wallet: Paypal
- credit card: Visa
- other
shipping valvplu:
- carrier: USPS
- type: Calculated
- service: USPS Ground Advantage
- class: Standard
- transit: 5-9 Days
- cost: $107.27
returns valvplu:
- policy: No Returns
general valvplu:
- condition: Used
- Pumps Pump Accessories > Vacuum Pumps > Diffusion Pumps
offer valvplu:
- availability: In Stock
- started: February 21, 2026
- best offers: True
- sold: 0
- options: Ship-to-home
- quantity: 1
seller valvplu:
- rating: 100.0%
- # reviews: 15
- city: Hillsboro, Oregon
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