Lenticular filters require smooth flow to operate correctly and efficiently. This can be achieved with a pump or compressed air.
When using compressed air, your solution should be placed in a tank and pushed downstream to your filter skid. Tank selection is important, and a pressure regulator is critical. Nitrogen can be used or clean compressed air that is ISO 8573-1 CLASS 0 certified like this one. The main concern with this setup is when you run out of solution and a surge of air enters your filter. If there is a surge in pressure, damage will occur to your filter modules and your filtrate will be contaminated. Always pay attention to your sight glasses over the filter housings to ensure that air is not accumulating over the housing and reducing filtration area and other issues.
We only sell AODD pumps for many reasons, thus we will only describe their use in this application. Noting the danger of a burst in air pressure, we prefer a pump. When your feed tank runs out of solution, the pump will be unable to add more fluid to your system and no damage will occur. Also, if you don't have Nitrogen in your lab, clean compressed air can be very expensive. Typically an AODD pump is the most cost effective solution both short term financially and long term in operating costs.
AODD pumps operate using pulsating diaphragms which causes pulsations in the fluid stream. This tends to be the greatest drawback of these pumps. In order to eliminate this problem, a pulsation damper is connected to the pump outlet which solves this problem. We supply our systems with an inline damper that completely solves this issue and creates a consistent stream so your Lenticular Skid can operate efficiently.