... . 4, Long service life. BWT column hollow fiber membrane advantage1,PVDF material.high chemical stability.2,High acid,alkali ... resistant and strong oxidation resistance.3,Hollow fiber membrane noodle is fingered hole-anisomerous structure, high anti-pollution. ... saving cleaning water. low operating cost. Column hollow fiber membrane specification MBF4BUBF4Pure water flux(25 °C 0.1MPa) 7000- ...