One-stage rotary vane pumps are available with an ultimate pressure between 0.5 mbar and 1x10-1 mbar with a comprehensive pumping speed ranging between 4.6 m³/h and 630 m³/h.
The compact design (small footprint, low weight) in combination with the high pumping speed makes these pumps ideal to use in laboratory or industrial applications. Due to their high water vapor tolerance and outstanding reliability these pumps are the perfect match for chemical applications. Additionally, users appreciate the exceptionally low sound level on daily operations. A gas ballast valve is included for use when pumping condensable vapors.
Welch one-stage rotary vane pumps require low maintenance which can be handled quickly and simply by the user with predefined service kits. To prevent accidental damage, the oil sight glass is integrated into the housing. When cleaning the pump, users benefit from the compact pump design which allows easy wipe cleaning.
With a comprehensive range of accessories these pumps are applicable to a wide range of applications.
One-stage rotary vane pumps are delivered with an anti-suck back valve (P-E series), oil charging, gas ballast valve, centering ring, clamping ring and motor overload protection.
Applications: Vacuum oven, Industrial, Drying, Degassing
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| Welch PS 20 -230V | Welch PS 20 3phase 230V/400V | Welch PS 40 -230V |
| 18m3/h with 1 mbar vacuum | 18m3/h with 1 mbar vacuum | 40m3/h with 1 mbar vacuum |
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| Welch PS 40 3phase 230V/400V | Welch PS 70 3phase 230V/400V | Welch PS 100 3phase 230V/400V |
| 40m3/h with 1 mbar vacuum | 70m3/h with 0.5 mbar vacuum | 100m3/h with 0.5 mbar vacuum |
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| Welch PS 200 3phase 230V/400V | Welch PS 250 3phase 230V/400V | |
| 190m3/h with 0.5 mbar vacuum | 240m3/h with 0.5 mbar vacuum |
