Chemical Duty Diaphragm Vacuum Pumps and Systems
Clean operation (oil free), low cost of ownership, highest reliability – these are just a few benefits that customers can appreciate when they use a diaphragm pump for laboratory or industrial applications. With a broad range of diaphragm pumps – ultimate vacuum from 75 to 1 mbar and peak flow rates up to 138 l/min – Welch offers specific pump families and models for a variety of uses.
Diaphragm pumps work completely without oil which has several advantages for the user:
- Less maintenance compared to other technologies saves time and money
- Dry vacuum allows cleaner workplace and environment
- Uncontaminated pumping of gases results in cleaner samples and no risk of oil back-streaming
Overview of Welch Diaphragm Pump Families
| DryFast | BTpro |
Self-Cleaners |
High-Capacity |
XPRF |
|
|---|---|---|---|---|---|
| Free Air Displacement, cfm |
0.9 to 2.5 | 1.4 to 6 | 1.2 | 2.3 to 7.8 | 4.5 to 6.9 |
| Ultimate Vacuum, torr | 40 to 9 |
15 to 6 |
9 to 2 |
56 to 1.5 | 100 to 25 |
| Chemical Resistant? | Yes |
Yes |
Yes |
Yes |
Yes |
| Self-Cleaning Feature? | No |
No |
Yes |
No |
No |
| Tunable Vacuum? | Yes | Select Models | Yes |
No |
No |
| Explosion-Proof Motor? |
No | No |
No |
No |
Yes |
