Duplex bag filters
Duplex bag filters
LiandaFiltration double-barrel bag filter is a highly efficient, modular double-bag filter designed for medium and high flow rate liquid pretreatment. The double-barrel layout can realize online switching of one side to ensure the replacement of filter bags without stopping the machine; 316L sanitary stainless steel material and mirror polished inner wall with industrial double-barrel filter structure can operate stably for a long time in food, chemical, pharmaceutical and other industries.
Technical parameters
parameter term | Specification range |
model number | D-BF-10, D-BF-20, D-BF-30 (differentiated by flow rate) |
material | 316L Sanitary Stainless Steel |
Number of filter bags | 2 (switchable filtration on one or both sides) |
Filtration accuracy | 1 µm, 5 µm, 10 µm, 25 µm, 50 µm (customizable) |
Maximum working pressure | 10 bar（145 psi） |
Maximum working temperature | 150 ℃ |
Interface form | Tri-Clamp Quick Release, Flange (DIN/ANSI/JIS), Threaded |
Filter bag specifications | 01, 02, 03 No./10″, 20″, 30″ (universal) |
Overall dimensions (L×W×H) | 600 x 400 x 800 mm (D-BF-20 standard size) |
Product Features and Benefits
Non-stop bag change design
Dual-tube parallel arrangement, with switching valve, can unload and change bags on one side in the online state, improving system availability.
High-efficiency large flow processing
Dual-channel diversion reduces the pressure difference of a single tube, suitable for high-efficiency bag filter application scenarios with flow ≥ 10 m³/h.
Sanitary manufacturing
Mirror polishing inside and outside (Ra ≤ 0.4 µm), no dead angle, meeting the strict cleanliness requirements of food-grade and pharmaceutical-grade bag filters.
Multi-specification compatibility
Supports mainstream 01/02/03 (10″–30″) filter bags on the market, and the filter bag materials can be PP, PE, nylon, PTFE, etc., which are more flexible in application.
Easy maintenance
Quick-install clamp and quick drain valve design, easy filtrate discharge and cleaning operations, reducing maintenance costs.
Application industry
Food and Beverage: Pre-filtration of production lines such as juice, beer, and dairy products to ensure stable back-end processes and hygienic safety.
Chemical Coatings: Filtration of high-viscosity liquids such as resins, paints, and inks to protect spraying and delivery systems.
Pharmaceutical Biology: Precise pretreatment of fermentation broth and water for injection in compliance with GMP requirements.
Environmental Water Treatment: Online filtration of circulating cooling water and recycled water systems to prevent clogging of pipe networks and equipment.
Petroleum and Petrochemicals: Online filtration of lubricating oil, hydraulic oil, and fuel to extend the life of machinery.
FAQ
Determined according to the processing flow rate, filtration accuracy and medium viscosity, D-BF-10 is suitable for less than 10 m³/h, D-BF-20 is suitable for 10-30 m³/h, and D-BF-30 is suitable for 30-60 m³/h.
Equipped with automatic drain valve and stop valve, after switching to the spare cylinder, only a small amount of residual liquid needs to be discharged for safe replacement.
Common PP filter bags are suitable for general water quality; nylon filter bags have better chemical resistance; PTFE filter bags can withstand high temperatures up to 150°C and can be customized according to working conditions.
It is recommended to check the pressure difference (ΔP > 0.2 bar) once a month and clean it online; and to disassemble and clean the cylinder once every six months to keep the cylinder clean.