The Agilent G3850-80240 is a DS 202 dual-stage oil-sealed rotary vane pump used to generate foreline vacuum in selected GC/MS instruments. It removes gases from the vacuum manifold and supports stable operation of the high-vacuum turbomolecular pump. Its robust design, DN 25 KF connections, and pumping speed of 8.3 m³/h at 50 Hz make it suitable as a genuine replacement component for compatible Agilent instrument service and refurbishment.
Key Features
- Dual-stage oil-sealed rotary vane design
- Designed as a foreline pump for selected GC/MS systems
- Pumping speed of 8.3 m³/h at 50 Hz
- Base pressure below 2 × 10⁻³ mbar
- Single-phase 240 V electrical configuration
- DN 25 KF inlet and exhaust flanges
- Integrated gas ballast
- Suitable for instrument service, repair, and refurbishment
Technical Specifications
- Model: DS 202
- Part Number: G3850-80240
- Product Type: GC/MS foreline pump
- Pump Design: Dual-stage oil-sealed rotary vane pump
- Supply Voltage: 240 V
- Motor Configuration: Single phase
- Pumping Speed at 50 Hz: 8.3 m³/h
- Pumping Speed at 60 Hz: 5.8 CFM
- Free Air Displacement at 50 Hz: 160 L/min
- Free Air Displacement at 60 Hz: 192 L/min
- Ultimate Total Pressure: < 2 × 10⁻³ mbar
- Ultimate Total Pressure with Gas Ballast: 2 × 10⁻² mbar
- Ultimate Partial Pressure: 1 × 10⁻⁴ mbar
- Water Vapor Tolerance: 15 mbar
- Water Vapor Capacity: 100 g/h
- Oil Capacity: 0.25 to 0.60 L
- Motor Rating at 50 Hz: approximately 0.45 kW
- Motor Rating at 60 Hz: approximately 0.55 kW
- Nominal Speed at 50 Hz: 1,500 rpm
- Nominal Speed at 60 Hz: 1,800 rpm
- Inlet Flange: DN 25 KF
- Exhaust Flange: DN 25 KF
- Weight: approximately 25 kg
Applications and Compatibility
- Foreline vacuum stage in GC/MS systems
- Backing of a turbomolecular pump
- Evacuation of the mass spectrometer vacuum manifold
- Routine GC/MS analysis
- Vacuum system servicing and refurbishment
- Replacement of a worn or defective DS 202 pump
