About us                                                                                                       As one of China hollow fiber ultrafiltration membrane manufacturer and supplier, Liquapure offers PAN hollow fiber membranes, PVC hollow fiber membranes, PVDF hollow fiber membranes and submerged membrane bioreactor(MBR) for over 20 years. Liquapure supply the ultrafiltration modules in Liquapure® brand, OEM & ODM for drinking water, water reuse, waste water treatment and reverse osmosis pretreatment.   The ultrafiltration modules are China top 10 uf membrane brand, which also passed “Drinking water related products” approval which authorized by Ministry of Health.   Features & Benefits                                                                                   Liquapure hollow fiber ultrafiltration membranes has advantages in Hydrophilic modified, and anti-scale High mechanical strength Double layer structure for high filtration efficiency and stable filtrate Chemical resistance, easy clean and maintenance PVC hollow fiber membranes are economical than other uf membrane materials PVDF hollow fiber membranes are suitable for waste water and desalination   Specifications                                                                                               Liquapure PVC250 10” PVC hollow fiber ultrafiltration membranes  

Specifications
Model	PVC250
Dimension(mm)	Φ250*1710
Membrane area(m2)	48
Filtrate flux(l/m2/hr)	35-100
Flow range(m3/hr)	2-5
Initial flux(m3/hr)	15
Membrane material	PVC or PAN
Membrane ID/OD(mm)	1.0/1.8
MWCO(Dalton)	100,000
Housing material	UPVC
Potting material	epoxy resin
Operation conditions
Flow Congiguration	Standard outside-in, Inside-out option
Operation mode	Cross flow or dead end
PH ranges, operating	2-11
PH ranges, cleaning	2-12
Temperature range	5~45 ℃
Max. Feed Pressure (Mpa)	0.3
Max. TMP Pressure(Mpa)	0.2
Max. Backwash pressure	0.2
Max. Feed turbidity	50 NTU
Max. Feed particle size(µm)	100
Max. Feed TDS	5 wt%
Max. Chlorine tolerance(ppm)	100 ppm
Back wash flux(m3/hr)	1.5-2 times of filtrate flux
Back wash frequency	20-60 minutes
Back wash duration	30-60 seconds
Disinfection chemicals	NaOCI
Cleaning chemicals	HCI, NaOH, or Citric Acid
Performance
Filtrate Turbidity	<0.1 NTU
Filtrate SDI	<2
Bacterial removal	≥99.99%

    FAQ                                                                                                              Q1: What is ultrafiltration? A1: Ultrafiltration is a variety of membrane filtration (MF, UF, NF, and RO), which is pressure driven process and physically remove bacteria, virus, suspended solids, colloids, coatings etc… The micron ratings arranges from 0.01μm to 0.001μm   Q2:What is ultrafiltration membrane pore size and micron ratings? A2: On most ultrafiltration manufacturers’ catalog, datasheet and manual, MWCO (Molecular Weight Cut Off) is used to show the characters rather than micron ratings. Here we list a simple but not very strict comparison.  

MWCO(Dalton)	30,000	50,000	100,000	150,000	200,000
Micron rating(μm)	0.007	0.008	0.01	0.05	0.01

  Q3: How to select Liquapure ultrafiltration membrane modules? A3: By material, PVC hollow fiber membrane MWCO is 100000(0.01μm) is suitable for ground water, surface water, tap water and treated grey water reuse and it is economical than other materials, PVDF hollow fiber membrane MWCO is 200000(0.1μm) is suitable for waste water, desalination.   By module dimension 4” diameter uf module is suitable for 1~5 m³/h, 6” diameter uf module is suitable for 1~20 m³/h, 8” diameter uf module is suitable for 5~50 m³/h, 10” diameter uf module is suitable for over 50 m³/h.   Q4: How to select ultrafiltration membrane flow configuration and operate mode? A4: PVC hollow fiber membrane is recommended for inside-out filtration as it is mechanical strength, PVDF hollow fiber membrane is recommended for outside-in filtration as its flexibility and suitable for air wash. Once the feed water is with good conditions, dead end filtration is available, while feed water conditions is not good, cross flow filtration is recommended for anti-scale   Q5: How to select Liquapure ultrafiltration membrane flow rate and operate parameter?  

Feed Water Type	Feed water Specifications		Design flux	Back wash Frequency	Maintenance clean
	NTU	TOC(mg/L)	L/m².h(25°c, 0.15 Mpa)	(min)
Ground water	<2	<1	80	60	Option
Tap water	<3	<2	75	60	Option
Surface water	<2-5	<2	75	60	Option
	<5-15	<5	60	45	Option
	<15-50	<10	50	30	Recommend
Sea water	<20	/	60	30	Option
Treated waste water	<5-15	<40	45	30	Recommend