HS-20 Oil Diffusion Pump - Data Sheet

Importance of the Topic

Oil diffusion pumps are critical in achieving high vacuum levels for industrial processes such as vacuum furnaces, heat treatment, metallizing, and thin-film deposition.

Objectives and Overview of Study

This summary reviews the Agilent HS-20 oil diffusion pump data sheet, focusing on its performance metrics, operational ranges, and design features that enable long-term, maintenance-free operation.

Methodology and Instrumentation

• Performance evaluation conducted using DC-704 pump fluid under controlled laboratory conditions.
• Pumping speeds measured according to AVS 4.1 (1963) standard.
• Instrumentation: Agilent HS-20 oil diffusion pump equipped with either a standard cold cap or halo baffle, supported by a DS202 rotary vane backing pump.

Main Results and Discussion

• Pumping Speed: 10,000 L/s for air; up to 12,500 L/s for helium and hydrogen; 17,500 L/s under AVS standard.
• Throughput: Maximum 12.5 Torr·L/s in operating range; up to 18 Torr·L/s at 0.01 Torr inlet pressure.
• Operating Range: 1.3 × 10⁻³ to 5 × 10⁻⁸ Torr, with no-load and full-load forepressure limits of 0.65 Torr and 0.55 Torr respectively.
• Thermal Management: Warmup in 45 min; cooldown in 85 min. Cooling water flow of 1.5 gpm at 15–26 °C is required.
• Backstreaming Rate: <1.5 × 10⁻³ mg/cm²/min with standard cold cap.
• Power and Utilities: 12 kW heater power; 3-phase 240/415/480 VAC connection; 4.7 L fluid charge.

Benefits and Practical Applications

The HS-20 delivers high-throughput vacuum generation with minimal maintenance, making it ideal for coating, metallurgical, and semiconductor applications requiring consistent low-pressure environments.

Future Trends and Opportunities

• Integration with digital monitoring and predictive maintenance systems.
• Development of advanced pump fluids and materials for higher thermal stability.
• Enhanced energy efficiency and reduced environmental impact.
• Expansion into emerging fields such as advanced optics and nanomaterials fabrication.

Conclusion

The Agilent HS-20 oil diffusion pump offers exceptional pumping speed, a broad operating range, and a durable design, fulfilling the needs of demanding vacuum processes with long-term reliability.

References

• Agilent HS-20 Oil Diffusion Pump Data Sheet, Agilent Technologies, November 17, 2023.