DS 402 Rotary Vane Pump

Significance of the topic

The DS 402 is a compact dual-stage oil-sealed rotary vane vacuum pump intended for laboratory and industrial roughing applications. Reliable low-vacuum generation with effective water‑vapor handling and integrated anti‑backstream features makes this pump relevant for processes requiring fast pumpdown, contamination control, and stable foreline pressure (for example, vacuum systems, instrumentation roughing, and sample preparation).

Objectives and overview of the data sheet

This document presents the key technical specifications, performance data, operational features, and ordering/maintenance options for the DS 402 pump. The aim is to provide end users and procurement specialists a concise reference to: the pump's pumping speed and ultimate pressures, motor options and electrical ratings, fluid handling and gas‑ballast capability, mechanical interfaces, weight and dimensions, and available spare parts and accessories.

Methodology and applied testing standards

Performance figures for pumping speed and ultimate pressures are reported according to the PNEUROP 6602 standard. The datasheet provides measured pumping speed curves (pressure vs. effective pumping speed) for 50 Hz operation and lists both partial and total ultimate pressures with and without gas ballast. Motor ratings are given for multiple global voltage ranges to support worldwide installation.

Used Instrumentation

Key built‑in pump features and interfaces described in the datasheet:

• Dual‑stage oil‑sealed rotary vane mechanism (factory-filled with pump fluid).
• Integrated inlet isolation (antibackstream) valve to preserve foreline/vacuum chamber integrity when power is removed.
• Manual gas‑ballast valve to control water‑vapor tolerance and improve vapor handling during operation.
• Standard mechanical connections: inlet and exhaust flanges DN25 ISO‑KF.
• Available motor configurations: universal single‑phase (integral power switch) and optional three‑phase motors with multiple voltage compatibility.

Main results and discussion (performance summary)

Principal performance and operational parameters summarized from the datasheet:

• Pumping speed: nominally 17.4 m3/h at 50 Hz (≈14.5 cfm at 60 Hz reported as 12.3 cfm in some listings; the datasheet provides both frequency‑specific values—confirm required frequency for procurement).
• Free air displacement: 342 L/min at 50 Hz and 410 L/min at 60 Hz (where stated).
• Ultimate pressures: partial pressure down to 1×10⁻⁴ mbar; total pressure typically <2×10⁻³ mbar. With gas ballast engaged, ultimate total pressure is degraded to approximately 2×10⁻² mbar.
• Water‑vapor handling: the pump includes a manual gas‑ballast to increase vapor tolerance. The datasheet contains two different water‑vapor figures (an overview claim of 550 g/hr and a technical table value of 350 g/h); users should confirm the applicable rating for their configuration and operating conditions.
• Water‑vapor tolerance: listed at 30 mbar (maximum inlet vapor pressure tolerated without immediate condensation-related failure).
• Oil capacity: nominal minimum/maximum 0.5/1.0 L; recommended pump fluid specified (AVF Silver, formerly DS19 type).
• Nominal rotation speeds: 1,500 rpm at 50 Hz and 1,800 rpm at 60 Hz.
• Mass and dimensions: approximately 35 kg (77 lb); compact footprint with DN25 ISO‑KF ports for both inlet and exhaust.

Benefits and practical applications

Key advantages and use cases derived from the datasheet:

• Integrated inlet isolation valve prevents oil backstreaming and preserves vacuum in the roughing line during power loss—useful for protecting sensitive vacuum chambers and instrumentation.
• Manual gas ballast expands vapor handling capability for processes that release water vapor (e.g., sample drying, solvent removal), reducing oil contamination and maintaining pump life.
• Worldwide motor voltage compatibility and optional three‑phase motor facilitate global deployment and compatibility with local power infrastructure.
• Compact size and modest weight enable bench‑mounted or skids for medium‑duty laboratory and industrial applications.
• Available maintenance kits (minor and major) and consumables (pump fluid, oil mist eliminator cartridges, exhaust filters) support predictable maintenance and reduced downtime.

Practical notes on maintenance and accessories

Service and consumables highlighted in the datasheet include:

• Minor maintenance kit (valves, O‑rings, seals) and major kit (includes vanes) with specific part numbers for refurbishment.
• Factory‑specified pump fluid AVF Silver (1 L and gallon packaging listed) to maintain proper lubrication and sealing.
• Oil mist eliminator and replaceable cartridges, exhaust filters and cartridges, oil return and drain accessories, and NW25 centering ring/clamp hardware for KF flange connections.

Future trends and potential applications

Anticipated directions and opportunities related to small rotary vane roughing pumps:

• Increased emphasis on low‑noise designs and enclosure integration for shared laboratory spaces.
• Improvements in oil and filter technologies to extend maintenance intervals and reduce hydrocarbon emissions to the environment.
• Hybrid or alternative dry pump roughing combinations for processes sensitive to oil contamination; rotary vane pumps will retain roles where oil lubrication provides superior compression and robustness for vapor‑laden loads.
• Integration with digital condition monitoring (vibration, oil condition sensors) to enable predictive maintenance and optimize uptime.

Conclusion

The DS 402 is positioned as a versatile, compact dual‑stage rotary vane pump offering robust roughing performance, integrated anti‑backstream protections, and configurable motor options for global use. It is suitable for laboratories and industrial applications requiring reliable pumpdown, reasonable vapor handling (with gas ballast), and straightforward maintenance support via dedicated kits and consumables. Users should verify the water‑vapor rating applicable to their chosen configuration due to differing values reported in the datasheet.

Reference

Agilent Technologies. DS 402 Dual‑Stage Rotary Vane Pump — Data Sheet. Agilent Technologies product literature, 2026. Part numbers and accessory listings included within the data sheet (e.g., pump ordering PN 9499330 for 1‑phase, PN 9499331 for 3‑phase, maintenance and consumable PN details).