PALL industrial filter, for example: 

1. Low pressure series: 
HC9600FUP13 
1234567

1-- Series 
2-----diameter dimension of the filter 
96 - φ78.5 × φ43 
91 --- φ70 × φ32.5 
89 --- φ96 × φ56 
9021 - φ45 × φ25 
2235 --- φ84 × φ48 
8300 - φ152 × φ10 
48314 --- φ152 × φ95 
8400 --- φ152 × φ83 
3 --- Pressure 
00 --- Low,, filter to withstand pressure 2MPa, 
01 --- high pressure filter to withstand pressure 21MPa, 
4 --- β ratio and retaining net 
D - β≥200 inside and outside with a metal grille 
U - within β≥75 metal grille 
K - β≥200 metal grille inside and outside, the inside of non-metallic sheath filter 
5 --- filtering accuracy 
Z 1 micron 
P 3 microns 
N 6 micron 
S 12 microns 
T 25 micron 
R 40 micron 
6 --- filter length 
4 - (45/8 ") is equivalent to 118mm 
6 --- (51/2 ") is equivalent to 140mm 
8 --- (83/16 ") is equivalent to 208mm 
10 - (101/8 ") is equivalent to 256mm 
13- (1228/32 ") is equivalent to 328mm 
15- (1411/16 ") is equivalent to 373mm 
16- (167/8 ") is equivalent to 428mm 
26 - (255/8 ") is equivalent to 652mm 
39--385 / 8 ") is equivalent to 981mm 
7 --- H sealing gasket NBR (black), suitable for oil. Emulsion. Marked (alkaline). Glycol, etc. 
J ethylene. Propylene (purple) 
P neoprene (red) acid 
Z fluorine rubber (brown) temperature, acid (resistant phosphate ester hydraulic fluids, blue oil), wear

 PALL filter HC9600 series filter design parameters

 UE  Series