DS 602 Rotary Vane Pump

Importance of the Topic

The reliable generation of low vacuum is a cornerstone for many laboratory and industrial processes including turbomolecular pump backing, freeze-drying, leak testing, and general research applications. Compact, oil-sealed rotary vane pumps remain widely used where robustness, gas-handling capability, and cost-effective roughing are required. The DS 602 dual-stage rotary vane pump represents a manufacturer-specified solution aimed at delivering stable rough vacuum with integrated features that reduce contamination risk and simplify maintenance.

Objectives and Overview of the Datasheet

The purpose of the datasheet is to present the DS 602 pump's technical performance, mechanical interfaces, motor options, operational limits, and accessory/maintenance components. It targets procurement specialists, vacuum-system designers, and laboratory personnel who need concise performance metrics (pumping speed, ultimate pressure, vapor handling) and installation/maintenance information to select and operate the pump in practical vacuum systems.

Methodology and Technical Specifications

The datasheet compiles manufacturer test data and standards-based (PNEUROP 6602) performance figures. Key technical parameters provided include free-air displacement, rated pumping speed, ultimate pressures (total and partial), water vapor tolerance and capacity, oil capacity, motor electrical ratings and rotation speeds, and mechanical connection standards. A pumping speed curve is included to show effective speed vs. pressure, enabling system integration and foreline conductance assessment.

• Free air displacement: 504 L/min at 50 Hz and 605 L/min at 60 Hz (manufacturer values).
• Pumping speed (per datasheet): 25.0 m3/h at 50 Hz and 17.6 cfm at 60 Hz (note: both pumping-speed and free-displacement metrics are given).
• Ultimate pressures: partial pressure 1 × 10^-4 mbar, total pressure < 2 × 10^-3 mbar; with gas ballast the total pressure is 1 × 10^-2 mbar.
• Water vapor handling: tolerance up to 30 mbar; rated capacity 550 g/h with gas ballast opened.
• Oil capacity: minimum 0.5 L, maximum 1 L.
• Motor and mechanical data: single-phase motor rating typically 1.1 kW (values for various voltages also provided); optional three-phase motors; nominal speeds 1,500 rpm at 50 Hz and 1,800 rpm at 60 Hz.
• Connections: inlet and exhaust flanges DN25 ISO-KF. Weight approx. 35 kg.

Used Instrumentation

The datasheet describes the DS 602 dual-stage oil-sealed rotary vane pump and lists available motor configurations (worldwide single-phase and three-phase options) and accessory products. Notable built-in instrumentation/features include an integrated inlet isolation (antibackstream) valve that closes when mains power is interrupted, and a manual gas ballast valve to control water-vapor tolerance. Available accessories and service parts are enumerated, including oil types, oil-mist eliminator and replacement cartridges, oil return kit, drain extension, centering rings and clamps for NW25, and maintenance kits (minor and major).

Main Results and Discussion

The DS 602 is positioned as a compact, dual-stage pump capable of achieving rough vacuum down to the low 10^-3 mbar range, with partial pressures down to 10^-4 mbar under recommended conditions. The included antibackstream valve is a practical feature that preserves vacuum in attached systems when the pump is turned off and reduces oil contamination risk. The manual gas ballast provides a high water-vapor throughput (550 g/h) enabling operation where vapor loads are significant, though the ultimate pressure with ballast is reduced to 1 × 10^-2 mbar. Operational implications:

• The pump's DN25 ISO-KF interfaces make it suitable for small vacuum benches and as a foreline pump for higher-vacuum stages (turbo, cryo).
• Oil capacity and choice of recommended fluids plus the availability of oil-mist eliminators help control backstreaming and exhaust emissions—important for clean processes and compliance.
• Motor options and worldwide voltage compatibility increase flexibility for global deployment; three-phase motor availability supports industrial installations where these supplies are standard.

Benefits and Practical Applications

• Robust dual-stage design provides reliable roughing to low 10^-3 mbar range suitable for many laboratory and industrial vacuum needs.
• Integrated inlet isolation valve prevents oil backflow and helps maintain vacuum in connected equipment when power is off.
• High water-vapor handling with gas ballast makes the pump appropriate for applications with occasional or sustained vapor loads (e.g., rotary evaporation, freeze-drying support, process outgassing).
• Compact footprint and standardized porting (DN25 ISO-KF) simplify system integration and replacement of existing roughing pumps.
• Accessory ecosystem and maintenance kits reduce lifecycle downtime and simplify field service.

Future Trends and Potential Uses

The DS 602 exemplifies current expectations for compact rotary vane forepumps, but future developments and deployment considerations include:

• Improved oil formulations and low-vapor-base fluids to reduce backstreaming and environmental emissions while maintaining lubrication and sealing performance.
• Integration of electronic monitoring (temperature, vibration, oil level) and remote alarms to support predictive maintenance and reduce unplanned downtime.
• Increased adoption of variable-frequency drives (VFDs) or smart motor controls to optimize power consumption, reduce noise, and provide stepless speed control for process-matched pumping speed.
• Hybrid systems combining rotary vane forepumps with dry pumping technologies for applications where oil contamination is unacceptable, enabling quick switching or staged operation.
• Regulatory and environmental pressure will continue to favor exhaust filtration and oil-mist elimination accessories; modular filtration cartridges and certified exhaust treatment will become standard for many labs and production facilities.

Conclusion

The DS 602 is a compact dual-stage oil-sealed rotary vane pump suited for a broad range of rough-vacuum tasks. Its integrated inlet isolation valve, gas ballast capability, and wide accessory/support ecosystem make it a pragmatic choice where reliable, cost-effective roughing and reasonable water-vapor handling are required. Selection should consider the required ultimate pressure with and without ballast, vapor loads, available power supply, and exhaust treatment requirements. For systems requiring oil-free operation or the ultimate lowest contamination risk, alternative dry technologies or staged solutions should be evaluated.

References

• Agilent Technologies DS 602 Rotary Vane Pump datasheet, document 5994-3544EN, 2021–2026. Manufacturer technical specifications and ordering information as provided in the product datasheet.