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Typical vertical filter Typical vertical filter Typical vertical filter
Typical vertical filter equipped with 36" long filter tubes and swing-bolt closure. Grid assembly welded to inside of top head rests on top of tubes to prevent their becoming unsealed.
Micron Tube

Pressure Drop vs. Flow for 36" Long, 3 Micron Tube
(Maximum Allowable Pressure Drop - 500 psi)
(Pressure Drop Slightly Less for Coarser Tubes)
(Pressure Drop Doubles for 1 Micron Tube)

FILTER MODEL NO.

 NO. OF 36" LONG FILTER TUBES A B

101-V

3

10¾ "

50"

121-V

6

12¾ "

51"

141-V

7

14"

51"

161-V

9

16"

52"

181-V

14

18"

53"

201-V

16

20"

54"

241-V

23

24"

55"

261-V

27

26"

55"

281-V

30

28"

56"

301-V

41

30"

58"

361-V

60

36"

58"

421-V

80

42"

60"

481-V

105

48"

65"

541-V

130

54"

66"

601-V

160

60"

68"

661-V

180

66"

70"

721-V

220

72"

76"
To determine the proper filter model for a given total flow rate, viscosity and initial pressure drop (usually 2-3 psi) enter the graph and find the allowable flow rate per tube. The total flow divided by the allowable flow per tube gives the total number of tubes required. Knowing the number of tubes required permits entering the chart and finding the proper filter model.
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