DS 302 Rotary Vane Pump

Significance of the topic

The DS 302 dual-stage oil-sealed rotary vane pump is a compact roughing (mechanical) vacuum pump intended for laboratory and light industrial vacuum applications. Understanding its performance envelope, interfaces, and maintenance requirements is important for selecting reliable foreline pumps for systems such as turbomolecular pump backing, analytical instrumentation, glove boxes, and general vacuum processes where modest ultimate pressures, water-vapor handling and quiet operation are required.

Objectives and overview of the datasheet

This datasheet documents the design intent, key performance specifications, physical interfaces and available consumables/accessories for the Agilent DS 302 rotary vane pump. It provides the manufacturer-rated pumping speeds at 50/60 Hz, achievable ultimate pressures (with and without gas ballast), motor and mechanical data, inlet/exhaust connections, and ordering/maintenance items to support procurement and lifecycle servicing.

Methodology and measured performance

The DS 302 is a two-stage oil-sealed rotary vane design. Performance data are reported according to the PNEUROP 6602 standard for roughing pumps. Key published performance highlights include:

• Pumping speed: 237 L/min (11.6 m3/h) at 50 Hz; 285 L/min (8.2 cfm) at 60 Hz.
• Ultimate total pressure (typical): <2 × 10⁻³ mbar. With gas ballast open the ultimate total pressure is approximately 2 × 10⁻² mbar.
• Ultimate partial pressure (presumably for non-condensable gases): 1 × 10⁻⁴ mbar.
• Water vapor tolerance: up to 20 mbar; rated water vapor pumping capacity ≈160 g/h when gas ballast is used appropriately.
• Motor and speed: single-phase universal-voltage motor (100–120/200–230 V ±10%, 50/60 Hz), nominal speeds ~1,500 rpm (50 Hz) and 1,800 rpm (60 Hz); rated motor power 0.72 kW.
• Oil capacity: minimum 0.25 L, maximum 0.6 L.

Used Instrumentation

The datasheet describes the DS 302 pump assembly and the factory-installed features important for system integration and operation:

• Built-in inlet isolation (antibackstream) valve that closes automatically when power is removed to retain vacuum in the foreline and prevent oil backstream into the vacuum chamber.
• Manual gas ballast valve to admit air (or dry gas) to the compression stage to improve water vapor handling and avoid condensation of vapors in the oil.
• Integral power switch, universal single-phase motor compliant with CE and UL/CSA standards.
• Standard flange interfaces: DN 25 ISO-KF at both inlet and exhaust.

Main results and discussion

The DS 302 provides a balance of modest pumping speed and relatively low ultimate pressure for a compact, oil-sealed rotary vane foreline pump. Discussion points relevant for users:

• Performance: At its rated speeds the pump reaches low 10⁻³ mbar region which is sufficient for many roughing tasks and as a backing pump for higher-vacuum stages. With the gas ballast open the lowest achievable pressure increases by roughly an order of magnitude, reflecting vapor handling tradeoffs.
• Vapor handling: The 20 mbar tolerance and 160 g/h capacity mean the pump can handle significant water load if the gas ballast is used; nonetheless condensable vapors should be managed (cold traps, appropriate gas ballast operation) to protect oil life and sealing.
• Contamination control: The inlet isolation valve protects the vacuum chamber from oil migration when the pump is powered down, reducing risk of oil contamination of sensitive instrumentation.
• Integration: Standard KF DN25 fittings and compact footprint combined with a quiet motor and global single-phase power capability simplify integration into lab equipment and international deployments.

Benefits and practical applications

Practical advantages and typical uses:

• Compact, quiet and serviceable foreline pump for analytical instruments (mass spectrometers, electron microscopes backing, GC-MS, etc.), coating systems, and small vacuum lines.
• Automatic inlet isolation reduces contamination risk and preserves vacuum in the foreline during power interruptions or service operations.
• Availability of maintenance kits and OEM pump fluid simplifies scheduled servicing and reduces downtime.
• Universal-voltage motor and CE/UL compliance ease global procurement and installation.

Accessories, maintenance and ordering

Key consumables and part numbers summarized to support procurement and maintenance planning:

• Main product: DS 302 dual-stage rotary vane pump, single-phase worldwide motor — Part number: 9499325.
• Maintenance kits: Minor kit (valves, O-rings, seals) — 9499370; Major kit (includes vanes) — 9499381.
• Pump fluids: AVF Silver (1 L) — 9499390 (global) and K7516301 (USA); 1 gallon — K7516302 (USA).
• Exhaust and oil management: Oil mist eliminator — 9499395; replacement cartridges and NW25 exhaust filter/cartridge (9499394, 9499392, 9499342).
• Service accessories: Oil return kit — 9499376; oil drain extension — 9499375.
• Power cables: European/USA/UK 2 m power cable options (9499396, 9499397, 9499398).
• KF connection hardware: NW 25 centering ring Viton (KC25AV) and aluminum clamp (KQ25AWP).

Future trends and potential applications

Trends and opportunities affecting selection and use of pumps like the DS 302:

• Environmental and contamination control: Increasing emphasis on oil-free alternatives in some sectors drives interest in dry pumps, but oil-sealed vane pumps remain cost-effective where low-to-moderate ultimate pressures and vapor handling are required.
• Integration with smart maintenance: Predictive maintenance via vibration or temperature monitoring could further reduce downtime for small roughing pumps; retrofit monitoring accessories are an opportunity.
• Energy and noise reduction: Continued optimization of motor efficiency and acoustic damping can broaden use in noise-sensitive lab environments.
• Modular exhaust treatment: Improved cartridge designs and integrated exhaust filtration will help meet local emission and contamination requirements while extending oil life.

Conclusion

The Agilent DS 302 is a compact, serviceable dual-stage rotary vane pump offering moderate pumping speed, low ultimate pressure suitable for many laboratory and light industrial vacuum duties, and practical features such as an inlet isolation valve, gas ballast and widely available maintenance kits. It represents a pragmatic choice when cost, footprint, and reliable foreline performance are prioritized, while users should plan for proper vapor management and routine oil-related maintenance to ensure long service life.

Reference

Agilent Technologies. DS 302 Rotary Vane Pump Data Sheet. Document 5994-3542EN. Printed July 16, 2026. Part number (product): 9499325. Contact and regional support information as provided by Agilent Technologies.