Equipment Introduction
Security filters are made of high-quality stainless steel 304 or 316. Due to their light weight, easy use, large filtration area, fast filtration speed, and non clogging, they are widely used in various industries for pre-treatment and filtration
Security filters can be installed with different types of filters, ranging from 10 “to 40”, as well as different types of filters such as PP melt blown filters, folding filters, wire wound filters, activated carbon filters, etc.
Security filters are generally installed before pressure vessels to remove fine particles with turbidity above 1 degree, in order to meet the requirements of subsequent processes for incoming water; Sometimes it is also set at the end of the entire water treatment system to prevent small particles from entering the finished water. Most security filters use stainless steel as the shell and are equipped with filter cartridges (such as PP cotton) inside. They are mainly used after multi-media pretreatment filtration and before membrane filtration equipment such as reverse osmosis and ultrafiltration. Used to filter out small substances (such as tiny quartz sand, activated carbon particles, etc.) after multi-media filtration, to ensure water quality filtration accuracy and protect membrane filtration elements from damage caused by large particles. The precision level of the filter cartridge installed in the precision filtration device can be divided into 0.5 μ m-100 μ m, etc. Different filtration accuracies are selected according to different usage scenarios to ensure the accuracy of the effluent and the safety of the downstream membrane components.

Working principle
The shell of the stainless steel security filter is made of high-quality stainless steel, and the filter element is made of formed filter material polypropylene fiber melt blown. Under pressure, the original liquid passes through the filter material, the filter residue remains on the filter material, and the filtrate flows out through the filter material, effectively removing impurities, sediments, suspended solids, and bacteria in the water, thus achieving the purpose of filtration.
Product Structure and Technical Parameters
Technical parameters of security filter:
- Working pressure: 0.1-0.6Mpa
- Working temperature: 20 * C-80 “C
- Dense to type: O-ring and flat pad
- Sealing material: Ding please rubber, silicone, gas rubber
- Interface form: thread, flange
- Applicable filter element: Flat mouth and 222 and 226 socket filter element
- Surface treatment: mirror polishing, electrolytic polishing
- Filtering accuracy: 0.5 μ m-100 μ m
- Shell material: stainless steel 304, 316L, carbon steel
| model | Filter model | Inlet/Outlet | Size | Housing thickness | Structure type | Number of filter elements | Filter size | flow t/h | material |
| LFB-1-5X | LFB-15X | DN25 | Φ219×700 | 2 | Flange | 5 | 10 | 1.5 | Carbon Steel/304 Stainless Steel |
| LFB-2-5X | LFB-25X | DN32 | Φ219×1000 | 2 | Flange | 5 | 20 | 3 | |
| LFB-3-5X | LFB-35X | DN40 | Φ219×1200 | 2 | Flange | 5 | 30 | 5 | |
| LFB-4-5X | LFB-45X | DN50 | Φ219×1500 | 2 | Flange | 5 | 40 | 7 | |
| LFB-4-10X | LFB-410X | DN65 | Φ325×1550 | 2.5 | Flange | 10 | 40 | 15 | |
| LFB-4-15X | LFB-415X | DN80 | Φ377×1600 | 3 | Flange | 15 | 40 | 22 | |
| LFB-4-20X | LFB-420X | DN80 | Φ426×1650 | 3 | Flange | 20 | 40 | 30 | |
| LFB-4-25X | LFB-425X | DN100 | Φ450×1700 | 3 | Flange | 25 | 40 | 40 | |
| LFB-4-30X | LFB-430X | DN100 | Φ500×1750 | 3 | Flange + boom | 30 | 40 | 45 | |
| LFB-4-35X | LFB-435X | DN100 | Φ550×1800 | 3 | Flange + boom | 35 | 40 | 55 | |
| LFB-4-45X | LFB-445X | DN125 | Φ600×1850 | 3 | Flange + boom | 55 | 40 | 85 | |
| LFB-4-50X | LFB-450X | DN125 | Φ650×1900 | 3 | Flange + boom | 61 | 40 | 90 | |
| LFB-4-60X | LFB-460X | DN125 | Φ700×1950 | 3 | Flange + boom | 73 | 40 | 110 | |
| LFB-4-65X | LFB-465X | DN150 | Φ750×2000 | 4 | Flange + boom | 85 | 40 | 125 | |
| LFB-4-70X | LFB-470X | DN150 | Φ800×2050 | 4 | Flange + boom | 91 | 40 | 135 | |
| LFB-4-80X | LFB-480X | DN150 | Φ900×2100 | 5 | Flange + boom | 121 | 40 | 180 | |
| LFB-4-100X | LFB-4100X | DN200 | Φ1000×2150 | 5 | Flange + boom | 131 | 40 | 195 |

The functions and features of the product
- Capable of withstanding high filtration pressure and effectively removing suspended solids, rust, etc. from liquids;
- The filter element can be made of various materials to meet the needs of fluid filtration;
- Small size, large filtration area, low resistance, and long service life;
- Acid and alkali resistant chemical solvents;
- High filtration accuracy, uniform pore size of the filter element, strong strength, high temperature resistance, and the filter element is not easily deformed;
- Low filtration resistance, high flux, strong interception ability, and long service life;
- The filter material has high cleanliness and no pollution to the filter medium;
- Low cost, low operating expenses, easy to clean, and replaceable filter element.
Scope of application of the product
- Nanofiltration (NF), ultrafiltration (UF), reverse osmosis (RO), electrodialysis (EDI) and other system security filtration and terminal filtration;
- Filtering of medical injections, intravenous fluids, eye drops, and herbal medicines, as well as extraction, purification, and concentration of biological agents;
- Pre filtration and terminal filtration of high-purity water for electronics, microelectronics, and semiconductor industries;
- Filtration of oilfield reinjection water, boiler feed water, chemical reagents, liquid organic products, high-purity chemicals, pesticides, etc;
- Filtration of drinking purified water, mineral water, fruit juice, tea drinks, and health drinks;
- Filtration of Baijiu, wine, beer, rice wine and other fruit wines, sterilization and filtration of pure draft beer (instead of pasteurization):
- Pre treatment filtration or security filtration in the process of production, domestic wastewater treatment, and reclaimed water recycling and reuse;
- Other industries such as biotechnology, oil refining, printing and dyeing, water supply and wastewater treatment in the textile industry, scientific research and experimental filtration, etc.

