The scroll pump is now being used as an oil-free vacuum pump. Every scroll pump consists ot two Archimedes spirals engaging each other with an offset of 180°. Thus several crescent-shaped pockets of differing sizes are created. By means of an eccentric drive, a second spiral is made to orbit about a fixed spiral, thus reducing the volume of the pockets and compressing gases from the outside towards the inside thereby pumping the gases.

Important to the quality of a scroll pump is that precise manufacturing tolerances are maintained and that suitable materials are selected.

Advantages to the User

Maintenance-poor, free of oil and bearing lubrication, free of hydrocarbons
Absolutely oil-free
High effective pumping speed
Low ultimate pressure
Low noise level
Low vibration operation
Atmospheric inlet pressure allowable
Low weight
Air cooling
Low power consumption

The EcoDry M incorporates a dry sliding mechanism without the need for oil or hydrocarbons.

Through the further developed and optimised compression processes, the EcoDry M 15/30 attains with three compression stages a base pressure (total) in the low 10-2 mbar range.

Since the EcoDry M 15/20/30 may be operated either vertically (as normally delivered) or horizontally, this pump is highly flexible when it has to be integrated into the customer’s system.

Advantages to the User

Low maintenance, free of oil and bearing lubrication, free of hydrocarbons
Extremely low particle emissions on the intake and exhaust sides
Rugged and most reliable
Low power consumption
Service friendly
Air cooling
Plug & play
Good pumping speed at low base pressure
High water vapour tolerance (gas ballast standard)
No grease lubricated bearings in the vacuum section
Leak tight
Compact size
Runs at 1000/1200 rpm (50/60 Hz mains)
Rugged full cross section exhaust valves
For both horizontal and vertical operation

Advantages to the User

Low base vacuum of 100 mbar
All parts of the pump head in contact with the gas are resistant against aggressive media through the use of PTFE (Teflon), FFPM (Kalrez) and PVDF (Solef)
Dry compressing, oil-free
Very high water vapour tolerance
Low maintenance costs and long service intervals through the use of high-quality components which are well-proven
Simple maintenance by staff of the customer
Low noise operation
Portable, compact, small footprint
Can be operated in any orientation
Illuminated mains switch on the pump
Overheat protection for the vacuum pump by means of a thermofuse
Available in three pumping speed categories
Modular system

Diaphragm Vacuum Pumps for Chemical Laboratory

Single-Stage:

DIVAC 0.6, 1.2, 2.2

Dual Stage:

DIVAC 0.6, 1.2, 2.2 L

Dry Compressing Backing Pumps for Turbomolecular Pumps

DIVAC 0.8 T and 0.8 LT