Is the 8040 RO membrane easy to install?

Membrane elements are typically stored in a 1% sodium bisulfite solution. Before system start-up, the system should be thoroughly flushed with clean water (qualified pretreated water or RO permeate water) to ensure that no solid particles remain in the piping system, such as iron filings, plastic hose fragments, sand, or other debris.

Once the membrane element packaging has been opened, the element should be connected to the piping system as soon as possible, followed by pressure testing and flushing to prevent the membrane fibers from drying out.

As shown in the diagram, a brine seal is installed on the feed water side of the membrane element. The correct installation direction is with the lip opening facing toward the feed water side.

The function of the brine seal is to seal the gap between the membrane element and the pressure vessel, ensuring that all feed water flows through the internal channels of the membrane element. During operation, feed pressure forces the brine seal lip to press tightly against the inner wall of the pressure vessel, forming an effective seal. If the seal is installed in the opposite direction, proper sealing cannot be achieved. As a result, part of the feed water will bypass the membrane surface and flow along the outer surface of the element. This reduces cross-flow velocity, weakens the control of concentration polarization on the membrane surface, and ultimately shortens membrane service life.

For 8-inch membrane elements, O-rings are installed in the external annular grooves of the interconnectors and adapters. For 4-inch membrane elements, O-rings are installed in the internal annular grooves of the interconnectors and adapters. Before installation, ensure that the O-rings are correctly positioned in their designated grooves and that there are no scratches, debris, or contamination on the O-rings or mating surfaces. Avoid twisting the O-rings during installation. If leakage occurs at the connector, feed water may mix with permeate water, resulting in a decline in product water quality. When installing onto the central tube, the O-rings and tube surface should be lubricated with clean water, distilled water, or hydrophilic glycerin to facilitate smooth installation.

Remove the end plates from both sides of the pressure vessel before installing the reverse osmosis membrane elements. Install the adapter onto the central tube of the first membrane element on the brine (concentrate) side. Then carefully insert the membrane element into the pressure vessel from the feed water inlet side, slowly pushing it toward the concentrate outlet side.