Edwards mXDS3/mXDS3s Compact Dry Scroll Vacuum Pump

Why Choose mXDS3/mXDS3s Compact Dry Scroll Pump

The Edwards mXDS3 and mXDS3s are compact oil-free dry scroll pumps from Edwards, filling the performance gap in small dry pumps and serving as replacements for same-specification oil-sealed rotary vane pumps and diaphragm pumps. The mXDS3 standard version has no inlet valve, while the mXDS3s comes factory-equipped with a delayed inlet isolation valve + exhaust silencing filter. Peak pumping speed 3-3.5 m3/h, ultimate vacuum as low as 0.1 mbar, standard gas ballast for water vapor applications, total weight only 7.8-8kg, supports both horizontal and vertical mounting, clean and oil-free, low noise and energy-efficient, significantly reducing equipment maintenance and environmental disposal costs.

Key Features

· Fully dry oil-free structure: No pump oil filling, replacement or waste oil disposal required, no oil vapor backflow contamination of vacuum chamber, clean and environmentally friendly

· Compact and lightweight: Total weight 7.8-8kg, with portable handle, small footprint, supports horizontal/vertical installation

· Adjustable inlet interface: Standard DN16-KF inlet flange, optional 1/4 inch quick-connect fitting, inlet can be rotated horizontally/vertically

· Stable vacuum performance: 3 m3/h at 50Hz, 3.5 m3/h at 60Hz, ultimate vacuum 0.1mbar with closed gas ballast, standard gas ballast for water vapor media

· Low noise and low vibration: Optimized air-cooled heat dissipation, noise only 54+/-2.5 dB(A), vibration level 1C, suitable for lab precision environments

· mXDS3s exclusive protection: Delayed electromagnetic inlet valve, fast shutoff on power loss to prevent backflow, with exhaust silencing filter assembly

· Universal electrical configuration: IEC-C13 standard power connector, built-in rocker switch, supports 100/115/200/230V single-phase wide voltage

· Complete accessories system: Brackets, shock pads, various adapters, seals, maintenance kits fully available, supports bulk export supply

Model Details

mXDS3 (Basic Standard Version)

· Features: No inlet isolation valve, basic pump body only

· Applications: For applications without strict backflow prevention requirements, budget-conscious vacuum backing configurations

· Available voltages: 100V/115V/200V/230V single-phase

· Part numbers: A74401903 / A74401904 / A74401906 / A74401907

mXDS3s (Premium Protection Version)

· Features: Factory-integrated delayed electromagnetic inlet valve + exhaust silencing filter

· Advantages: Automatic shutoff on power loss prevents atmospheric backflow contamination

· Applications: Helium leak detection, analytical instruments, precision vacuum systems

· Available voltages: 100V/115V/200V/230V single-phase

· Part numbers: A74402903 / A74402904 / A74402906 / A74402907

Complete Model List

Technical Specifications

Frequently Asked Questions

Q: Are the two pump models identical in vacuum performance?

A: Pumping speed and ultimate vacuum are exactly the same. Only the mXDS3s has the additional inlet valve and exhaust filter assembly.

Q: Can the pump run at atmospheric pressure for extended periods?

A: Only short-term atmospheric pumping is allowed. Prolonged high inlet pressure accelerates bearing and seal wear, shortening lifespan.

Q: What is the routine maintenance cycle?

A: Under clean conditions, replace scroll tip seal kit every 2 years; for dusty or water vapor conditions, recommend annual inspection.

Q: Can an inlet valve be retrofitted on mXDS3?

A: Yes, you can purchase solenoid valve and delayed relay kits separately for modification, but installation requires matching original factory base bracket.

Q: What exhaust hose specification is required?

A: Standard 6-8mm outer diameter hose. The mXDS3s comes with integrated exhaust silencing filter so no additional installation needed.

Conclusion

The Edwards mXDS3/mXDS3s small dry scroll pumps are clean oil-free alternatives to oil-sealed rotary vane pumps and diaphragm pumps, with 3 m3/h standard pumping speed and 0.1 mbar ultimate vacuum. Compact structure, flexible installation, low noise and energy efficient. The basic version and the premium version with backflow protection cover different vacuum application requirements. Widely used for turbomolecular pump backing, lab analytical instruments, OEM small vacuum equipment, with simple maintenance, oil-free and environmentally friendly, making them the preferred primary dry pump for small to medium clean vacuum systems.