Long life dry claw vacuum pumps developed

Clean technologies are of particular importance in vacuum technology as they are economical and environmentally friendly. With this in mind, Atlas Copco has developed the DZS 600 VSD+ and DZS 1200 VSD+ dry, oil-free claw pumps that are powerful, energy-efficient and easy to control and maintain. Typical areas of application for the vacuum pump are CNC routing, pneumatic conveying systems and central vacuum systems. The oil-free, air-cooled DZS 600 VSD+ and DZS 1200 VSD+ series work reliably over a long service life.

Atlas Copco product manager Ahmed Elshaffie said: “The DZS VSD+ are simple and modular in design.” They consist of the pump and gear chambers, which are separated by seals and their energy-efficient, low-wear operation is based on a special coating of the wetted parts and rotors as well as their simple operating principle. Two claws rotate contactlessly in opposite directions in the pump housing. This draws air into the pump chamber, compresses it and expels it again under pressure.

In the gear chamber, two gear wheels synchronise the claw rotation. The non-return valve in the inlet flange prevents air from flowing back into the vacuum chamber when the pump is switched off. The pumps are driven directly by a flange-mounted motor via a coupling.

Energy efficient
With their integrated VSD+ inverter drive with pressure setpoint control, the vacuum pumps can be operated at high rotor speeds. The motor speed adapts to the process load in an energy-efficient manner. Mr Elshaffie said: “The DZS 600 VSD+ and DZS 1200 VSD+ models can run continuously at their ultimate vacuum level without overheating.”

Another important advantage is their variable use, as the compact pumps take up very little installation space in rough vacuum applications. With the help of the Atlas Copco VSD+ app for iOS and Android devices, users can control and monitor the DZS VSD+ series via their smartphone and thus access relevant parameters in real time. Another benefit of the app is that it also makes it easier to commission the series by setting the target pressure, start/stop delay and stop level. All users have to do is start the pump, connect the VSD+ app via Bluetooth and enter the desired parameters.

Mr Elshaffie added: “We have been using the robust, reliable claw technology in vacuum technology and other areas for many years. With the DZS 600 VSD+ and DZS 1200 VSD+ models, Atlas Copco therefore offers a simple, reliable pump that can support customers in their processes for a long time without interruption.”