Plastic thermoforming
Typical checks include pump-down time, pressure holding, cycle recovery, leakage, working pressure, and required volumetric flow rate.
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SDR SeriesRough Vacuum Dry Screw Pump
SDR covers rough vacuum duties mainly between 20000 Pa(a) and 50000 Pa(a).
Pressure boundary
Below 20000 Pa(a)
Below the SDR range
Below 20000 Pa(a), review the duty as a medium or higher vacuum application.
20000 Pa(a) to 50000 Pa(a)
Primary SDR range
Use SDR as the starting point when the process mainly runs in this rough vacuum range.
Above 50000 Pa(a)
Possible, but uncommon
SDR can also be reviewed above 50000 Pa(a), though this range rarely appears in current RFQs.
Rough Vacuum Series Guide
Choose a rough vacuum series
TF, QER, and QGR are the rough vacuum series on this page. At 20000 Pa(a) to 50000 Pa(a), we first check required volumetric flow rate and pump-down behavior, then review gas condition and site requirements.
TF Series
Rough vacuum series. Start with TF when pump-down behavior, required volumetric flow rate, and the available application references fit the process.
QER Series
Rough vacuum series. Review QER against the working pressure, required volumetric flow rate, gas condition, and operating cycle before choosing a model.
QGR Series
Rough vacuum series. Review QGR against the working pressure, required volumetric flow rate, gas condition, and operating cycle before choosing a model.
Applications And References
Rough Vacuum Duties and Project References
These references show how rough vacuum duties are reviewed. Start with the closest application, then compare its working pressure, required volumetric flow rate, gas condition, and operating cycle with your own process.
Industries
Filtration and dewatering
Typical checks include flow at working pressure, wet carryover, solids, separator layout, and liquid condition.
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FAQ
SDR Series selection questions
These are the points we usually clarify before recommending an SDR series.
Ready for a pump selection review?
Send the process data you have. We will review the operating point and configuration with you.
