( s patented diaphragm increases pneumati...)Improving an Integral Part of the Lab: Vacuum

s patented diaphragm increases pneumatic performance and results in longer service life than that provided by conventional flat diaphragms. The structured diaphragm also allows for the manufacture of smaller sized pumps. And, thanks to the smooth diaphragm surface, it has good chemical stability and gas-tightness compared to flat membranes still in wide use today that employ clamping disks.

Sophisticated System
Uncomplicated and yet ingenious, sturdy and reliable all words appropriate to describe the new PowerDry system. It is based on the pressure differential between pumping chamber and the atmosphere: when the solenoid valve in the drying system opens, air at atmospheric pressure and at a high flow rate, streams into the pump head while under vacuum. Due to the pressure ratios, the intake valve on the suction side of the pump automatically seals off the suction port so that the vessel vacuum is undisturbed. The intake valve functions as a kind of automatic non-return valve. In contrast, the discharge valve of the pump opens because of a sudden increase in pressure. It produces a continuous, directed flow of air that forces the condensate through the second head and out the pump.

Once the solenoid valve of the drying system closes again, the pumps intake valve opens automatically and evacuation of the vessel resumes. Evacuation continues until time for a new drying cycle. Electronically controlled, the entire drying cycle lasts only two seconds.

Applications
By introducing PowerDry vacuum pumps, KNF Neuberger opens the door to new opportunities for laboratory users. Evaporative processes that develop large amounts of condensate finish faster and more effectively with the PowerDry system. A welcome result is a reduction in noise, since pumps burdened with unwanted fluids exhibit increased diaphragm and valve noises.

Self-drying pumps are ideal for all processes that d
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