Overview
The PTFE Single Bag Filter is a specialized filtration unit designed for industries where chemical resistance and purity are critical. Its core component is a seamless PTFE filter bag housed in a stainless steel or polypropylene casing. The system operates via pressure-driven flow, allowing liquids to pass through the bag while retaining contaminants. Unlike standard bag filters, PTFE construction provides unmatched inertness, making it ideal for aggressive acids, solvents, and high-temperature applications. It’s widely adopted in pharmaceuticals, semiconductor manufacturing, and specialty chemicals, where even trace contamination or filter degradation is unacceptable.
Structure and Working Principle
The filter consists of a pleated or non-pleated PTFE membrane bag supported by a stainless steel mesh basket. Liquid enters the housing, flows through the bag’s porous structure (with pore sizes ranging from 0.1 to 100 μm), and exits through the outlet port. Particulates are trapped on the bag’s inner surface, while the PTFE material ensures no leaching or reactivity. A key design feature is the single-bag configuration, which simplifies maintenance and reduces downtime. The housing typically includes pressure gauges to monitor clogging and a vent for air displacement. For sterile applications, versions with sanitary tri-clamp fittings are available.
Key Features
PTFE Single Bag Filters stand out for their extreme chemical resistance, handling concentrated acids (e.g., hydrofluoric, sulfuric) and organic solvents without degradation. They operate continuously at temperatures up to 260°C, far exceeding nylon or polypropylene alternatives. The non-stick surface minimizes particle adhesion, enabling efficient backwashing or disposable use. Low extractables (<1 ppm) make them suitable for ultra-pure processes like semiconductor etching or injectable drug manufacturing. Optional features include conductive bags for explosive environments or layered designs for multi-stage filtration.
Application Areas
In pharmaceuticals, these filters purify solvents for API synthesis and remove endotoxins from WFI (Water for Injection). Chemical plants use them for catalyst recovery and aggressive fluid clarification, while food/beverage sectors employ them for edible oil filtration. The electronics industry relies on PTFE bags to filter high-purity chemicals in wafer fabrication. Emerging uses include biofuel processing and nuclear waste treatment, where radiation resistance is crucial. Their FDA/USP Class VI compliance ensures suitability for regulated industries.
Maintenance and Precautions
Routine maintenance involves inspecting the housing O-rings and replacing bags when pressure drop exceeds 10–15 psi. For reusable bags, ultrasonic cleaning with compatible solvents restores flow rates. Always depressurize the system before opening to prevent splashing of hazardous fluids. Avoid sharp tools during bag installation to prevent tears. Store spare bags in original packaging away from UV light. In CIP (Clean-in-Place) systems, verify PTFE’s compatibility with cleaning agents like hot caustic solutions.
B2B Procurement Guide
Industrial buyers should specify pore size (e.g., 5 μm for general clarification, 0.2 μm for sterile filtration), flow rate (typically 10–200 GPM per bag), and connection type (flanged, threaded, or tri-clamp). Leading manufacturers include Parker, Pall, and Sartorius. Bulk orders (10+ units) often qualify for 15–20% discounts. Consider total cost of ownership: While PTFE bags cost 3–5× more than polypropylene, their longevity in harsh conditions reduces change-out frequency. Request material certifications (e.g., USP, FDA, REACH) for regulated applications.
Related Manufacturers
- 主营：[]
- 主营：[]
- 主营：[]
- 主营：[]
- 主营：袋式过滤器、密闭板式过滤器、精密过滤器、不锈钢过滤器、滤芯过滤器、硅藻土过滤器、自清洗过滤器、层叠过滤器、板框过滤器、微孔过滤器、烛式过滤器、小车过滤器、塑胶过滤器、篮式过滤器、滤袋
- 主营：[]
- 主营：自清洗过滤器、袋式过滤器、精密保安过滤器、篮式过滤器、磁性过滤器、多级过滤器、钛棒过滤器、烛式过滤器、大通量过滤器、超声波清洗机、高压转篮清洗机、过滤机
- 主营：初效过滤器、中效过滤器、高效过滤器、畜牧猪场空气过滤器、G4初效过滤器、板式初效过滤器、洁净室初效过滤器、无尘车间初效过滤器、可清洗初效过滤器
- 主营：[]
- 主营：压滤机、微孔曝气器
- 主营：[]
- 主营：全自动自清洗过滤器、烛式过滤器、全自动刮刀式过滤器、袋式过滤器、保安过滤器、多柱式反冲洗过滤器、叠片式反冲洗过滤器、篮式过滤器、移动式过滤机、三合一过滤机
- 主营：[]
- 主营：[]
- 主营：不锈钢袋式过滤器、不锈钢板框过滤器、钛棒过滤器、层叠过滤器、压缩空气过滤器、气体过滤器
- 主营：锂电池、冷凝器、滤袋布、过滤芯、螺旋板、传感器、捕集袋、钛滤板、干燥机、活性炭、过滤网、过滤板、滤布袋、压滤机、针刺毡、吸尘器、富氢机、补集袋、支撑板、制氮机、换热器、分离器、过滤机、曝气头、过滤片
- 主营：袋式过滤器、自清洗过滤器、管道过滤器、混合器
- 主营：PAE微孔过滤机、单层压滤器、不锈钢储罐、袋式过滤器、刮刀自清洗过滤器、滤芯过滤器、大流量保安过滤器、列管式反冲洗过滤器、多芯自清洗过滤器、篮式过滤器、防腐衬四氟过滤器、刷式自清洗过滤器、强磁除铁过滤器、板框式过滤器、机械过滤器、滤芯、滤袋、滤膜
- 主营：衬四氟板袋式过滤器、过滤机
- 主营：自清洗过滤器、反冲洗过滤器
- 主营：衬四氟管道
- 主营：滤布、过滤布、压滤机滤布、过滤器滤布、无纺布、液体滤袋、带式压滤机滤布、板框滤布、板框压滤机滤布、工业滤布、斜槽透气布、单复丝滤布
- 主营：输送带、无缝带、密封件、四氟膜、四氟焊接膜、聚四氟乙烯薄膜、聚四氟乙烯膜、聚四氟乙烯电子薄膜、铁氟龙四氟膜、ptfe薄膜、氟塑薄膜、乙烯薄膜、车削薄膜、铁氟龙薄膜、支持包边接头、无缝粘合机带、特氟龙无缝带、铁氟龙无缝带、无缝传送带、铁氟龙输送带、特氟龙输送带、铁氟龙胶带、铁氟龙膜胶带、防腐蚀特氟龙膜、宽幅铁氟龙胶带
- 主营：高效液相色谱仪、超高效液相色谱仪、制备液相色谱仪、针式过滤器、半制备液相色谱仪、液质联用仪
- 主营：衬四氟Y型过滤器、球阀、清管阀、蝶阀
- 主营：袋式过滤器、不锈钢板框过滤器、层叠过滤器、压缩空气过滤器、钛棒过滤器、精密过滤器、烛式过滤器、叶片过滤器、烧结滤芯、滤袋、滤布
- 主营：快速接头、硅胶管接头、扣压公接头、钢衬四氟管、软管母头接头、法兰扣压接头、螺纹扣压接头、tc卡盘扣压接头、DIN扣压母接、DIN扣压公接头、固定法兰扣压接头、水粉混合机、卫生级离心泵、不锈钢波纹管、PU工业软管、衬氟快速公头、衬氟接头、装旋转扣压接头、不锈钢DIN螺母、衬氟快速接头、不锈钢SMS平接头、快装皮管接头、导静电快速扣压接头
- 主营：衬氟Y型过滤器、闸阀
- 主营：闸阀、截止阀、止回阀、衬四氟阀门、篮式过滤器、球阀、蝶阀、气动闸阀、气动截止阀、气动球阀、电动闸阀、电动截止阀、电动球阀、气动调节阀、电动调节阀、美标阀门、软密封阀门、水利控制阀、天然气专用阀门、管夹阀、气动蝶阀、电动蝶阀、针型阀、氧气阀门、夹套保温阀门
- 主营：ePTFE过滤膜、ePTFE滤材、特氟龙薄膜、聚四氟乙烯薄膜、膨体聚四氟乙烯、折叠滤芯用膜、防水透气膜、空气净化滤材、口罩滤材、工业除尘滤材、服装膜、HEPA滤纸、液体过滤膜、堆肥膜、除菌过滤膜、吸尘器滤材、无纺布、洁净室过滤材料、无尘拖链膜、电缆膜、ePTFE微孔膜、防水透声膜、质子交换膜、MBR平板膜、双向拉伸膜
- 主营：袋式过滤器、自清洗过滤器、浅层砂过滤器、液压油过滤器、黎明过滤器、自洁式空气过滤器、初效过滤器、高效过滤器、中效过滤器、高精度滤油机、液压油滤芯、颇尔滤油机
- 主营：针筒式滤膜过滤器、标准品、DRE
- 主营：过滤器、过滤机
- 主营：粉末烧结滤芯、钛滤芯、不锈钢烧结滤芯、袋式过滤器、烛式过滤器、板框过滤器、精密过滤器、层叠过滤器、PPH过滤器、钛棒过滤器、篮式过滤器、气体液体过滤器、PEPA微孔精密过滤器、玻璃钢过滤器、自动清洗过滤器、大流量滤芯过滤器、刮刀过滤器、刷式过滤器、正压过滤器、叶片过滤器、磁性过滤器、不锈钢丝网折叠滤芯、烧结毡滤芯、pp折叠滤芯、钛棒滤芯