Max working pressure 150Psi
DL-RS devices (also known as security filters) are mostly made of stainless steel and contain filter cartridges (such as PP cotton), which are mainly used after multi-media pretreatment filtration, reverse osmosis, ultrafiltration and other membrane filtration equipment. It is used to filter out fine substances (such as tiny quartz sand, activated carbon particles, etc.) filtered by the multi-media to ensure the water filtration accuracy and protect the membrane filter elements from large particulate matter. The precision grade of the filter element installed in the precision filter device can be divided into 0.5μs, 1μs, 5μs, 10μs, etc. Different filtration precisions are selected according to different use occasions to ensure the accuracy of the post-water output and ensure the safety of the post-stage membrane components.
PP cotton, nylon, meltblown and other materials are used as filter elements to remove tiny suspended solids, bacteria and other impurities in the water, so that the raw water quality meets the water ingress requirements of the reverse osmosis membrane.
Folding process principle
The security filter is a precision filter. Its working principle is to use the 5 μm pore of the PP filter for mechanical filtration. Traces of suspended particles, colloids, microorganisms, etc. remaining in the water are trapped or adsorbed on the surface and pores of the filter element. As the water production time increases, the filter element is gradually increased due to the contamination of the retentate. When the water pressure difference between the operation and the inlet and outlet reaches 0.1 MPa, the filter element should be replaced. The main advantages of the security filter are high efficiency, low resistance and easy replacement.
Folding structure and principle
The security filter adopts a shaped filter material, and under the action of pressure, the raw liquid passes through the filter material, the filter residue remains on the pipe wall, and the filtrate permeates through the filter material, thereby achieving the purpose of filtration. Structure: filter cloth, filter screen, filter, sintered filter tube, wire wound filter, melt blown filter and so on. The filter pore size is different depending on the filter material. Precision filtration is a kind of filtration between sand filtration (coarse filtration) and ultrafiltration. The filtration pore size is generally in the range of 0.5~120μm. The same type of filter material can be divided into different specifications according to the size of the outer shape. There are two kinds of wire-wound filter elements (also known as honeycomb filter elements): one is polypropylene fiber---polypropylene skeleton filter element, the maximum use temperature is 60 °C; the other is absorbent cotton fiber---stainless steel skeleton filter element, the maximum operating temperature is 120 °C. The melt-blown filter element is a filter material formed by a melt-blown process using polypropylene as a raw material, and the maximum working temperature is 60 °C. Precision filtration removes suspended solids, certain colloidal substances and small particles in the water.