YUASA Hollow Fiber Membrane Filters

YUASA Hollow Fiber Membrane Filter uses a polysulfone membrane, which is characterized by excellent filtration performance and heat and chemical resistance. This helps to achieve high precision filtration,at 0.04, 0.1, 0.2, 0.45 and 0.8 μm.

Yuasa's membrane filtration technology is used in many different applications because of the commercialization of cartridge filters using hollow fiber membrane filters for polysulfone, which is compatible with severe conditions for separation and refinement, namely the efficient filtration of fluid containing 0.04 - 0.8 micrometer fine particles. This area is regarded as a boundary between precision filtration and ultrafiltration. This is an area of high precision filtration.

YUASA Hollow Fiber Membrane Filter has high porosity and allows for a large membrane area. Therefore it has a very high level of filtration capability. It also excels in heat and chemical resistance.

image:Appearance of YUASA Hollow Fiber Membrane Filters1 image:Appearance of YUASA Hollow Fiber Membrane Filters2

Features

  • Use of a good membrane material, polysulfone, allows for filtration at high flow rates.
  • The asymmetric polysulfone membrane unfailingly captures fine particles and bacteria.
  • Filtration life of the hollow fiber membrane filter is twice or three times larger than that of a traditional pleats-type cartridge filter.
  • Heat resistance: 90 °C (or 121 °C for 60 minutes an autoclave)
  • Recyclable by chemical cleaning
  • Recyclable by adverse-pressure cleaning
image:Appearance of A filtration system

A filtration system can be designed with the use of YUASA Hollow Fiber Membrane Filters.
Contact us for details.

Applications

  • Elimination of bacteria and clarifying filtration in food and beverages
  • Filtration of process water
  • Filtration of ultrapure water
  • Filtration of fluids

Performance of elimination of bacteria

A study was conducted with the use of pseudomonas and serratia bacteria as an example of high precision filtration.
As demonstrated by the analysis results, the YUASA Hollow Fiber Membrane Filters:

  • Is a complete sterilization filter the LRV (bacteria capturing performance)of which is larger than 9 at 0.2 μm and 0.45 μm.
  • Which completely eliminates pseudomonas and serratia bacteria that are smaller than hiochi bacteria.
  • Is therefore capable of also capturing other general bacteria such as E. coli.

Analysis results

Pore size of
a hollow fiber membrane
(μm)
Test bacteria Challenge bacteria
count
Viable bacteria count
in filtrate
0.2 Brevundimonas diminuta 7.5×109 0
0.45 Brevundimonas diminuta 9.8×109 0
Serratie marceScen 3.2×1011 0

Size of bacteria

Species Diameter(μm) Length (μm)
Brevundimonas diminuta 0.5〜0.7 1.5〜3.0
Serratie marceScen 0.5〜0.8 0.9〜2.0
Hi-ochi Lactic acid bacteria 0.5〜0.6 3.0〜4.0
image:Size of bacteria

Specifications

Model Pore size
μm
Outside diameter
mm
Length
mm
Effective membrane area
m2
Pressure resistance*
MPa
Heat resistance*
Bacteria/particle elimination performance
LRV (particle/indicator bacteria)
Operating pH region
pH
222
O-ring
Double
open
end
YHF−04 0.04 φ70 10inch
20inch
30inch
260
498
750
250
508
10inch
20inch
30inch
1.6
3.7
5.8
0.4(25℃) 90
(Autoclave: 121 °C x 60 minutes)
>12 Latex partpcle (diameter 0.042μm) 2-14
YHF−10 0.1 >12 Latex partpcle (diameter 0.109μm)
YHF−20 0.2 >9 Brevundimonas diminuta
YHF−45 0.45 >11 Serratie marceScen
YHF−80 0.8 10inch
20inch
30inch
1.0
2.3
3.6

Pressure and heat resistance of the hollow fiber membrane filter depend on the condition of use.

Shape

Indication Shape
3 222 O-ring image:Appearance of 222 O-ring1image:Appearance of 222 O-ring2
F Double open end(flat gasket) image:Appearance of Double open end1image:Appearance of Double open end2

Flow rate characteristics

graph:Water flow rate