Example to　explain　the effect of using right pre-filter
 
　
　

Yamashin Filter Mfg corp. is always trying to much our customers need.  This
time we like to explain how we choose filter from inline solution.
This customer wants to make the used inline solution back to almost new
solution.
First of all we preferred one-step filtration system. But after we tested
the inline solution, we preferred two-step filtration system. I will explain
how we chose the filter using a example.
I would like our customer to know choosing right filter gives longer
lifetime for filter. 
　 　

1.

Using particle counter to test inline solution.

　  
　 [Inline solution] 
　
　

particle size
5-10 10-15 15-20 20-25 25-30 30<

Pcs./10cc

 2027630 276900 109470 32800 12915 10645
　 　
　 [New solution]
　
　

particle size
5-10 10-15 15-20 20-25 25-30 30<

Pcs./10cc

 410 140 110 46 31 75
　  

2.　

 Using the data of particle size and particle number to chose pre-filter and
final filter and use inline solution to test filtration efficiency.
(Filtration efficiency test)
　  
　 [Choosing pre-filter 1, abs.12 micron meter]
　
　

particle size
5-10 10-15 15-20 20-25 25-30 30<

Pcs./10cc

 --- 112134 2465 87 22 18

Filtration efficiency(%)

 --- 59.5 97.75 99.73 99.82 99.83
　
　 [Choosing pre-filter 2, abs.20 micron meter]
　
　

particle size
5-10 10-15 15-20 20-25 25-30 30<

Pcs./10cc

 --- 221600 31495 1607 97 61

Filtration efficiency(%)

 --- 19.97 71.22 95.1 99.24 99.43
　
　 [Choosing final filter 1, abs.1 micron meter]
　
　

particle size
5-10 10-15 15-20 20-25 25-30 30<

Pcs./10cc

 611 171 124 49 17 45

Filtration efficiency(%)

 99.97 99.94 99.89 99.85 99.87 99.43
　
　 [Choosing final filter 2, abs.3 micron meter]
　
　

particle size
5-10 10-15 15-20 20-25 25-30 30<

Pcs./10cc

 698 105 84 43 30 43

Filtration efficiency(%)

 99.97 99.96 99.92 99.87 99.77 99.60
　
　 　
　 　

3.

 Choosing final filter 1〜2, and choosing pre-filter 1〜2 from combination of
multi step filtration system using by inline solution to test filtration
efficiency.
　 　
　 [Choosing pre-filter 1, abs.12 micron meter -> Choosing final filter 1, abs 1 micron meter]
　
　

particle size
5-10 10-15 15-20 20-25 25-30 30<

Pcs./10cc

 --- 67 3 0 0 0

Filtration efficiency(%)

 --- 99.94 99.87 100.00 100.00 100.00
　
　  
　 [Choosing pre-filter 2, abs.20 micron meter -> Choosing final filter 1, abs.１micron meter]
　
　

particle size
5-10 10-15 15-20 20-25 25-30 30<

Pcs./10cc

 --- 133 35 2 0 0

Filtration efficiency(%)

 --- 99.94 99.89 99.88 100.00 100.00
　
　  
　 [Choosing pre-filter 1,  abs.12micron meter -> Choosing final filter 2, abs.3 micron meter]
　
　

particle size
5-10 10-15 15-20 20-25 25-30 30<

Pcs./10cc

 --- 45 2 0 0 0

Filtration efficiency(%)

 --- 99.96 99.92 100.00 100.00 100.00
　
　  
　 [Choosing pre-filter 2, abs. 20 micron meter -> Choosing final filter 2, abs. 3 micron meter]
　
　

particle size
5-10 10-15 15-20 20-25 25-30 30<

Pcs./10cc

 --- 89 25 2 0 0

Filtration efficiency(%)

 --- 99.96 99.92 99.88 100.00 100.00
　

4.

 Lifetime check test
　 Combination of Pre-filter from 3 -> Use inline solution to test final filter.
We start time beginning put pressure up to 9.8kPa (Guaranteed differential
pressure) and time
　 　
　
　

47 mm

10" filter
Choosing final filter 1, abs.１ micron meter

71 min

18.1 min
Choosing final filter 2, abs. 3 micron meter 104 min 29.0 min
Choosing pre-filter 1, abs. 12 micron meter -> Choosing final filter 1, abs.1 micron meter 178 min 45.3 min
Choosing pre-filter 2, abs.20micron meter -> Choosing final filter 1, abs.1 micron meter 89 min 22.6 min
Choosing pre-filter 1, abs.12micron meter -> Choosing final filter 2 abs.3 micron meter 260 min 72.5 min
Choosing pre-filter 2, abs.20micron meter ->Choosing final filter 2, abs.3 micron meter 130 min 36．3min
　 　
　 　

Informaition
　

Yamashin Filter Mfg, Corp. Process Filter Group
Phone: 81-45-324-7768 Fax:81-45-311-2097

Kenji Ando
　  
Copyright(C)1998-2003 Yamashin Filter Manufacuturing Corporation. All rights Reserved