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Edwards EXT 70H Turbomolecular Drag Vacuum Pump with Integrated Compound Stages
Product Description
The Edwards EXT 70H is a compound vacuum pump integrating a turbomolecular pump and a drag pump on a single high-speed shaft, designed for demanding vacuum applications in molecular flow regimes.
- Pump Design: Combines a multi-stage axial-flow turbomolecular pump with a drag pump utilizing pumping channels formed by plane rotating disks, enabling efficient gas compression at both low and higher pressures.
- Rotor Construction: Machined from a single piece of light alloy, the rotor features angled blades for the turbomolecular stages and disks for the drag stages, rotating at up to 90,000 rpm for effective pumping near the thermal velocity of gases.
- Blade Configuration: Open structure at the inlet for maximum pumping speed and gradually more closed structure at the outlet to optimize gas compression, suitable for gases of varying molecular weights.
- Gas Compression: Process gas passes through successive turbomolecular stages before transfer to the drag pump channels, where further compression occurs via close-running seals that direct the gas through the pump’s internal channels.
- Applications: This pump is critical in molecular diagnostics, bioprocessing vacuum systems, synthetic biology setups, and biomanufacturing workflows requiring high vacuum and cleanliness. Its precision and efficiency make it widely adopted in biotechnology research fields such as gene editing, molecular cloning, and live-cell imaging environments.
- Operational Notes: The pump is recognized for its ability to handle a wide range of gas species and pressures, essential for vacuum conditioning in biomedical engineering and analytical instrumentation.
This unit is sold "as-is" for parts or refurbishment with reduced pricing and no full functional guarantee. Refer to the official Edwards EXT 70H Manual for detailed operational parameters and maintenance guidelines.
This turbomolecular drag pump represents a specialized vacuum solution for researchers and professionals engaged in high-precision vacuum applications across clinical diagnostics, biotechnology, and advanced bioprocess engineering.
Item Stats
Product details
| Manufacturer | Edwards High Vacuum Intl |
| Model | EXT 70H |
| Condition | As is |
| Serial Number | 096108797 |
| MPN | B722-25-000 |
| Condition Description | SELLING AS-IS FOR PARTS |
| Electrical Requirements | 80VDC |
| Electrical Certification / Approval | CSA |
| Dimensions | 130mm L x 80mm diam |
| Weight (lbs) | 4 |
| Country/region of manufacture | United Kingdom |
| Custom Label | SM17 |
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