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Self-Drying Vacuum Pumps... the solution for applications producing condensation

re flexible. It runs independent of the pump and can be switched on as needed. If the system is turned off, the pump operates in the usual way. The versatility of the system is demonstrated further by the ability to adjust PowerDry to specific process requirements.

The control system differentiates between three variables:

t1: the amount of time between switching on the drying system and the first ventilation cycle of the pump head,

t2: the amount of time for ventilating,

t3: the amount of time between the ventilation cycles.

Although the values for t1, t2 and t3 are set at the factory, they can be modified at any time when the drying system is powered down. Operators have a choice of 10 values for each setting.


Self-Drying Pumps Powerful and Reliable
KNF vacuum pumps equipped with the PowerDry system are based on both simple and strong technologies. Diaphragm pumps are sturdy and reliable, in part because of a simple operating principle. An elastomeric diaphragm is moved up and down by a rotating eccentric. During the descending stroke of the pump, it draws in the gas to be delivered through the intake valve. In the ascending stroke, the diaphragm compresses the gas through a discharge valve and out of the head. Several stages may be utilized.

The valves of the diaphragm pump are automatically controlled and utilized for the drying system. During the intake process, the discharge valve (elastomer disk) is sealed closed and compressed by the pressure ratio while the intake valve opens. During discharge, the process is reversed.

As one of the worlds leading pump manufacturers, KNF Neuberger has applied the principle of diaphragm pumps successfully to application-oriented and high-performance products for over 50 years. On
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