Precision filter is also called honeycomb filter or security filter: it is made of stainless steel 304, and the outer surface is polished. PP melt blown filter element is installed inside.
Use the different pore sizes of the filter element to selectively filter water. Common filter element specifications are 50 μ, 30 μ, 20 μ, 10 μ, 5 μ, and 1 μ, which mainly remove mechanical impurities in the water and are the latter stage The reverse osmosis system provides protection. There are pressure gauges before and after the filter, which can analyze the pollution of the filter element according to the pressure difference between the inlet and outlet water to ensure the normal operation of the system.
After filtering by a multi-media filter and an activated carbon filter, the water will occasionally contain particulate impurities due to the leakage of the filter layer. These particles are potentially harmful to the reverse osmosis membrane and the vertical multistage centrifugal pump. As the name suggests, the security filter is the last line of protection before entering reverse osmosis.
The security/precision filter is equipped with a polypropylene melt-blown filter element with a retention accuracy of 5μm and an external pressure filter method. It is mainly used to remove impurities such as suspended solids, particles and colloidal particles greater than 5μm in the water to ensure that the reverse osmosis device is satisfied. The influent SDI value requirement (SDI <5) achieves the purpose of protecting the reverse osmosis membrane.