Replace Your Backing Pump Without Compromising Performance
If your mass spectrometer’s backing pump is failing—or you're looking to cut costs without sacrificing reliability—the Welch CRVpro series offers a direct, economic alternative. Designed to support GC-MS, TOF, ICP-MS, and LC-MS systems, these rotary vane pumps outperform standard models in durability, thermal management, and chemical resistance.
Welch CRVpro pumps run 10°C cooler than typical rotary vane pumps, thanks to enhanced airflow. Internal PTFE coatings and external black oxide treatments reduce corrosion and extend service intervals. A large oil chamber helps dilute chemical vapors, minimizing oil breakdown and internal damage.
Whether you're replacing an Edwards, Agilent, Pfeiffer, or other brand, CRVpro units are engineered to fit and perform.
CRVpro Series Highlights
Cooler Operation: Runs 10°C cooler than standard rotary vane pumps.
Corrosion Protection: PTFE-coated oil case and black oxide exterior.
Extended Service Life: Large oil chamber reduces chemical attack and oil breakdown.
Quiet Performance: Low noise levels for lab environments.
Exhaust Filter Option: Coalesced oil drain-back feature eliminates return lines.
Model Comparison
| Application Type | Welch Model | Flow Rate (CFM) |
|---|---|---|
| GC-MS / Small TOF | CRVpro 2 | 1.8 |
| ICP-MS / Low-End LC-MS | CRVpro 4 | 2.8 |
| LC-MS | CRVpro 8 | 5.6 |
| LC-MS | CRVpro 16 | 12.8 |
| LC-MS | CRVpro 24 | 18.3 |
| LC-MS | CRVpro 30 | 22.1 |
Competitor models range from 1.27 to 22.3 CFM, but Welch offers broader coverage and better thermal and chemical resilience.
Ordering & Accessories
Voltage Options: 115V North America plug or 230V Schuko/UK/IEC.
Exhaust Filters: Available for all models with oil drain-back feature.
Vacuum Oils: Gold and Premium grades for extended pump life and performance.