FRA-RFM
FRA
149
FRA
RETURN FILTERS
Head and cover: Aluminum alloy
Bowl: Polyamide for FRA21-31-32-33-41
Zinc plated steel for FRA11-42-51-52- 53-5D
Bypass valve: Polyamide
Seals: NBR Nitrile - FKM Fluoroelastomer on request
Indicator housing: Brass
Max. working: 300 kPa (3 bar)
Collapse, dierential for the lter element (ISO 2941): 300 kPa (3 bar)
Tank top return line lter
Setting: 170 kPa (1,7 bar) ± 10%
Qmax 700 l/min
MATERIALS
PRESSURE
DESCRIPTION
BYPASS VALVE
FLOW RATE
From -25° to +110° C
Full with uids: HH-HL-HM-HV-HTG
(according to ISO 6743/4)
For uids dierent than the above mentioned,
please contact our Customer Service.
Is this datasheet the latest release? Please check on our website
WORKING TEMPERATURE
COMPATIBILITY (ISO 2943)
HYDRAULIC DIAGRAM
150
ORDERING AND OPTION CHART
FRA
RETURN FILTERS
F R A
COMPLETE FILTER FAMILY FILTER ELEMENT FAMILY
E R A
SIZE & LENGTH
11 21 31 32 33 41 42 51 5A 52 5B 5C 53 5D
SIZE & LENGTH
PORT TYPE
B = BSP thread
B B B B B B B B B B B B B B
N = NPT thread N N N N N N N N N N N N N N
S = SAE thread - S S S S S S S S S S S S S
F = SAE ange 3000 psi - - - - - - - F F F F F F F
PORT SIZE
03 = 3/8"
03 - - - - - - - - - - - - -
04 = 1/2" - 04 04 - - - - - - - - - - -
06 = 3/4" - - 06 06 06 - - - - - - - - -
08 = 1" - - - 08 08 08 08 - - - - - - -
10 = 1" 1/4 (F10 not available) - - - - - 10 10 10 10 10 - - - -
12 = 1" 1/2 (* F12 available only for FRA4+ only) - - - - - (*) (*) 12 12 12 - - - -
16 = 2" (F16 not available) - - - - - - - 16 16 16 16 16 16 16
20 = 2" 1/2 (F20 only) - - - - - - - 20 20 20 20 20 20 20
BYPASS VALVE
B = 170 kPa (1,7 bar)
X B B B B B B B B B B B B B
SEALS SEALS
N = NBR Nitrile
N N N N N N N N N N N N N N
F = FKM Fluoroelastomer F F F F F F F F F F F F F F
G = Treatment for water-glycol G G G G G G G G G G G G G G
FormulaUFI MEDIA FormulaUFI MEDIA
FA = FormulaUFI.MICRON 5 µm
(c)
β>1.000
FA FA FA FA FA FA FA FA FA FA FA FA FA FA
FB = FormulaUFI.MICRON 7 µm
(c)
β>1.000 FB FB FB FB FB FB FB FB FB FB FB FB FB FB
FC = FormulaUFI.MICRON 12 µm
(c)
β>1.000 FC FC FC FC FC FC FC FC FC FC FC FC FC FC
FD = FormulaUFI.MICRON 21 µm
(c)
β>1.000 FD FD FD FD FD FD FD FD FD FD FD FD FD FD
CC = FormulaUFI.CELL 10 µm β>2 CC CC CC CC CC CC CC CC CC CC CC CC CC CC
CD = FormulaUFI.CELL 25 µm β>2 CD CD CD CD CD CD CD CD CD CD CD CD CD CD
ME = FormulaUFI.WEB 60 µm ME ME ME ME ME ME ME ME ME ME ME ME ME ME
CLOGGING INDICATOR
01 = 1/8" port, plugged
01 01 01 01 01 01 01 01 01 01 01 01 01 01
30 = pressure gauge, rear connection 30 30 30 30 30 30 30 30 30 30 30 30 30 30
32 = pressure gauge, bottom connection 32 32 32 32 32 32 32 32 32 32 32 32 32 32
P1 = SPDT pressure switch P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1 P1
ACCESSORIES
W = without
W W W W W W W W W W W W W W
P = with lling plug P P P P P P P P P P P P P P
X
ACCESSORIES
X= no other accessory available
X X X X X X X X X X X X X X
151
FILTER HOUSING FILTER ELEMENT CLOGGING INDICATOR ACCESSORIES
B R A B X E R A X
SPARE PARTS
NBR FKM
FRA11
521.0032.2 521.0039.2
FRA21
521.0012.2 521.0040.2
FRA31-32-33
521.0013.2 521.0041.2
FRA41-42
521.0014.2 521.0043.2
FRA51-5A-52-5B-
5C-53-5C
521.0015.2 521.0044.2
FRA11
008.0032.1
FRA21
008.0149.1
FRA31-32-33
008.0003.1
FRA41-42
008.0151.1
FRA51-5A-52-5B-
5C-53-5C
008.0028.1
SPARE SEAL KIT
SPARE SPRING
RFM 040-050--055
FRA 51-5A-52-5B-5C-53-5D
FRA 11-21-31-32-33
RFM 060-070-080-100-110-125-150-160
Tank mounting pattern
Tank mounting pattern
Tank mounting pattern
RFM 004-008-012-015-020-025-030
FRA 41-42
90°
45°
75°
D4
D4
30.0°
60.0°
E
D1
H6
H4
H3
H1
D2
D2
D2
D5
H2
D3
D4
R
P
P
P
FRA
RFM 040-050--055
FRA 51-5A-52-5B-5C-53-5D
FRA 11-21-31-32-33
RFM 060-070-080-100-110-125-150-160
Tank mounting pattern
Tank mounting pattern
Tank mounting pattern
RFM 004-008-012-015-020-025-030
FRA 41-42
90°
45°
75°
D4
D4
30.0°
60.0°
E
D1
H6
H4
H3
H1
D2
D2
D2
D5
H2
D3
D4
R
P
P
P
FRA
152
INSTALLATION DRAWING
FRA
RETURN FILTERS
D1 min D2 max D2 D3 D4 D5 E H1 H2 H3 H4 H6 P R Kg
FRA11
3/8" 50 50 12 80 6,5 40 59 16 12 33 9 1/8" 90 0,30
FRA21
1/2" 67 68 24 90 6,5 50 85 20 22 33 9 3/8" 120 0,45
FRA31
1/2"-3/4" 89 90 28 115 9 67 107 25 28 47 10 3/8" 150 0,80
FRA32
3/4" - 1" 89 90 28 115 9 67 150 25 28 47 10 3/8" 190 0,95
FRA33
3/4" - 1" 89 90 40 115 9 67 234 30 28 47 10 3/8" 270 1,10
FRA41
1" - 1"1/4 - 1"1/2 126 131 40 175 10,5 95 248 50 35 56 13 1/2" 289 2,10
FRA42
1" - 1"1/4 - 1"1/2 126 131 40 175 10,5 95 268 30 35 56 13 1/2" 306 2,30
FRA51
1"1/4 - 1"1/2 - 2" - 2"1/2 174 180 50 220 10,5 115 178 50 55 69 13 1/2" 250 3,10
FRA5A
1"1/4 - 1"1/2 - 2" - 2"1/2 174 180 50 220 10,5 115 240 50 55 69 13 1/2" 315 3,50
FRA52
1"1/4 - 1"1/2 - 2" - 2"1/2 174 180 63,5 220 10,5 115 240 50 55 69 13 1/2" 315 3,60
FRA5B
2" - 2"1/2 174 180 63,5 220 10,5 115 240 50 55 69 13 1/2" 315 3,65
FRA5C
2" - 2"1/2 174 180 63,5 220 10,5 115 240 50 55 69 13 1/2" 250 3,65
FRA53
2" - 2"1/2 174 180 63,5 220 10,5 115 285 50 55 69 13 1/2" 355 4,10
FRA5D
2" - 2"1/2 174 180 63,5 220 10,5 115 300 50 55 69 13 1/2" 370 4,30
FILTER HOUSING
153
MAINTENANCE
B
A
C
FILTER ELEMENT
AREA (cm
2
)
A B* C Kg Media
F+
Media
C+
Media
M+
ERA11
38 13 50 0,05 270 345 200
ERA21
52 24 70 0,10 310 380 240
ERA31
70 28 85 0,20 620 990 460
ERA32
70 28 130 0,25 1.000 1.600 740
ERA33
70 40 210 0,40 1.660 2.670 1.220
ERA41
99 40 211 0,75 3.800 4.280 1.900
ERA42
99 40 250 0,90 4.550 5.100 2.270
ERA51
130 51 140 1,00 4.140 4.360 1.800
ERA5A
130 51 200 1,10 5.840 6.460 2.730
ERA52
130 63 200 1,35 5.840 6.460 2.700
ERA5B
130 63 200 1,45 7.070 7.070 2.700
ERA5C
130 63 232 1,50 7.280 7.600 3.040
ERA53
130 63 251 1,55 7.500 8.350 3.450
ERA5D
130 63 266 1,60 8.000 8.800 3.730
1) Stop the system and verify there is no pressure in the lter.
2) Loosen the screws (1) until the cover (2) is free to rotate clockwise.
3) Remove the cover (2) and the spring (3) below. N.B. Handle
with care the clogging indicator (7) when present.
4) Remove the dirty lter element (4) using its handle.
N.B. The exhausted lter elements and the oil dirty lter parts are
classied “Dangerous waste material” and must be disposed of
according to the local laws, by authorized Companies.
5) Check the lter element part number on the lter label or in the
ordering and option chart. Use only original spare parts.
6) Lubricate the element o-ring gasket (5) with oil.
7) Insert the clean element into its seat with care.
8) Re-assembly the spring (3).
9) Check the cover o-ring condition (6) and lubricate with oil.
If damaged, check the seal kit part number in the spare seal kit table
10) Re-assembly the cover (2) and tighten the screws (1)
Accessories:
Clogging indicator (7).
If damaged, unscrew and replace it (check the part number in the
ordering and option chart). Apply a thread-sealing and screw until
tight. N.B. overtightening can damage the thread.
* Connection dimension
1
7
6
4
2
5
3
154
FRA
RETURN FILTERS
PRESSURE DROP CURVES (ΔP)
The “Assembly Pressure Drop (Δp)” is obtained by adding the
pressure drop values of the Filter Housing and of the Clean Filter
Element corresponding to the considered Flow Rate and it must
be lower than 50 kPa (0,5 bar). In any case this value should never
exceed 1/3 of the bypass valve setting.
0
10
20
30
40
50 100 150 200 250 300 350 400 450 500 550 600 650 700 750
l/min
Δp (kPa)
11”” 1144//11 ””1/21/2
2
2””1/21/2
1
1”” 22””3/43/4””1/21/2””3/83/8””
FRA
FRA 1
RETURN FILTERS
25
0
50 75 100 125 150
100
200
300
400
7,5
0
15 22,5 30 37,5 45
12,5
25
37,5
50
15
0
30 45 60 75 90
25
50
75
100
15
0
30 45 60 75 90
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
l/min
Δp (kPa)
Δp (kPa)
l/min
l/min
Δp (kPa)
l/min
Δp (kPa)
Δp (kPa)
l/min
Δp (kPa)
l/min
CDCD
CC
CC
FDFD
ME
ME
FC
FC
FA
FA
FB
FB
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FAFA FBFB
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FB
FBFAFA
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FB
FBFAFA
CD
CD
FD
FD
FC
FC
CC
CC
MEME
FB
FBFAFA
FRA 21-31-32-33
ERA 11
ERA 21
ERA 31 ERA 32
ERA 33
FRA 2
RETURN FILTERS
25
0
50 75 100 125 150
100
200
300
400
7,5
0
15 22,5 30 37,5 45
12,5
25
37,5
50
15
0
30 45 60 75 90
25
50
75
100
15
0
30 45 60 75 90
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
l/min
Δp (kPa)
Δp (kPa)
l/min l/min
Δp (kPa)
l/min
Δp (kPa)
Δp (kPa)
l/min
Δp (kPa)
l/min
CDCD
CC
CC
FD
FD
MEME
FC
FC
FAFA
FB
FB
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FAFA FBFB
CD
CD
CC
CC
FD
FD
FC
FC
ME
ME
FB
FBFAFA
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FB
FBFAFA
CD
CD
FD
FD
FC
FC
CC
CC
MEME
FB
FBFAFA
FRA 21-31-32-33
ERA 11 ERA 21
ERA 31
ERA 32
ERA 33
FRA 2
RETURN FILTERS
25
0
50 75 100 125 150
100
200
300
400
7,5
0
15 22,5 30 37,5 45
12,5
25
37,5
50
15
0
30 45 60 75 90
25
50
75
100
15
0
30 45 60 75 90
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
l/min
Δp (kPa)
Δp (kPa)
l/min l/min
Δp (kPa)
l/min
Δp (kPa)
Δp (kPa)
l/min
Δp (kPa)
l/min
CDCD
CC
CC
FD
FD
MEME
FC
FC
FAFA
FB
FB
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FAFA FBFB
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FB
FBFAFA
CD
CD
CC
CC
FD
FD
FC
FC
ME
ME
FB
FBFAFA
CD
CD
FD
FD
FC
FC
CC
CC
MEME
FB
FBFAFA
FRA 21-31-32-33
ERA 11 ERA 21
ERA 31
ERA 32
ERA 33
FRA 2
RETURN FILTERS
25
0
50 75 100 125 150
100
200
300
400
7,5
0
15 22,5 30 37,5 45
12,5
25
37,5
50
15
0
30 45 60 75 90
25
50
75
100
15
0
30 45 60 75 90
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
l/min
Δp (kPa)
Δp (kPa)
l/min
l/min
Δp (kPa)
l/min
Δp (kPa)
Δp (kPa)
l/min
Δp (kPa)
l/min
CDCD
CC
CC
FD
FD
MEME
FC
FC
FAFA
FB
FB
CD
CD
CC
CC
FD
FD
FC
FC
ME
ME
FA
FA FBFB
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FB
FBFAFA
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FB
FBFAFA
CD
CD
FD
FD
FC
FC
CC
CC
MEME
FB
FBFAFA
FRA 21-31-32-33
ERA 11
ERA 21
ERA 31 ERA 32
ERA 33
FRA 2
RETURN FILTERS
FILTER HOUSING PRESSURE DROP
(mainly depending on the port size)
CLEAN FILTER ELEMENT PRESSURE DROP WITH F+, C+ AND ME MEDIA
(depending both on the internal diameter of the element and on the lter media)
100
0
200 300 400 500 600
100
200
300
400
50
0
100 150 200 250 300
100 150 200 250 300
25
50
75
100
50
0
100 150 200 250 300
25
50
75
100
50
0
25
50
75
100
100
0
25
50
75
100
100
0
25
50
75
100
100
0
200 300 400 500 600
200 300 400 500 600200 300 400 500 600
25
50
75
100
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
FDFD
CD
CD
CC
CC
ME
ME
FA
FA
FB
FB
FC
FC
CC
CC
MEME
FC
FC
FD
FD
CD
CD
CC
CC
MEME
FAFA
FB
FB
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
MEME
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
MEME
FC
FC
FD
FD
CD
CD
CC
CC
MEME
FB
FBFAFA
FD
FD
FAFA
FB
FB
FC
FC
CD
CD
ERA 41-42-51-52-53-5D
ERA 41
ERA 51
ERA 53
ERA 52
ERA 5D
ERA 42
FRA 3
RETURN FILTERS
100
0
200 300 400 500 600
100
200
300
400
50
0
100 150 200 250 300
100 150 200 250 300
25
50
75
100
50
0
100 150 200 250 300
25
50
75
100
50
0
25
50
75
100
100
0
25
50
75
100
100
0
25
50
75
100
100
0
200 300 400 500 600
200 300 400 500 600200 300 400 500 600
25
50
75
100
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
FDFD
CD
CD
CC
CC
MEME
FAFA
FB
FB
FC
FC
CC
CC
ME
ME
FC
FC
FD
FD
CD
CD
CC
CC
MEME
FAFA
FB
FB
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
MEME
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
MEME
FC
FC
FD
FD
CD
CD
CC
CC
MEME
FB
FBFAFA
FD
FD
FA
FA
FB
FB
FC
FC
CD
CD
ERA 41-42-51-52-53-5D
ERA 41
ERA 51
ERA 53
ERA 52
ERA 5D
ERA 42
FRA 3
RETURN FILTERS
100
0
200 300 400 500 600
100
200
300
400
50
0
100 150 200 250 300
100 150 200 250 300
25
50
75
100
50
0
100 150 200 250 300
25
50
75
100
50
0
25
50
75
100
100
0
25
50
75
100
100
0
25
50
75
100
100
0
200 300 400 500 600
200 300 400 500 600200 300 400 500 600
25
50
75
100
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
FDFD
CD
CD
CC
CC
MEME
FAFA
FB
FB
FC
FC
CC
CC
MEME
FC
FC
FD
FD
CD
CD
CC
CC
ME
ME
FA
FA
FB
FB
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
MEME
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
MEME
FC
FC
FD
FD
CD
CD
CC
CC
MEME
FB
FBFAFA
FD
FD
FAFA
FB
FB
FC
FC
CD
CD
ERA 41-42-51-52-53-5D
ERA 41
ERA 51
ERA 53
ERA 52
ERA 5D
ERA 42
FRA 3
RETURN FILTERS
100
0
200 300 400 500 600
25
50
75
100
l/min
FC
FC
FD
FD
CD
CD
CC
CC
ME
ME
FB
FBFAFA
100
0
25
50
75
100
200 300 400 500 600
l/min
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
ME
ME
100
0
200 300 400 500 600
100
200
300
400
50
0
100 150 200 250 300
100 150 200 250 300
25
50
75
100
50
0
100 150 200 250 300
25
50
75
100
50
0
25
50
75
100
100
0
25
50
75
100
100
0
25
50
75
100
100
0
200 300 400 500 600
200 300 400 500 600
200 300 400 500 600
25
50
75
100
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
FDFD
CD
CD
CC
CC
MEME
FAFA
FB
FB
FC
FC
CC
CC
MEME
FC
FC
FD
FD
CD
CD
CC
CC
MEME
FAFA
FB
FB
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
ME
ME
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
MEME
FC
FC
FD
FD
CD
CD
CC
CC
MEME
FB
FBFAFA
FD
FD
FAFA
FB
FB
FC
FC
CD
CD
ERA 41-42-51-52-53-5D
ERA 41
ERA 51
ERA 53
ERA 52
ERA 5D
ERA 42
FRA 3
RETURN FILTERS
155
25
0
50 75 100 125 150
100
200
300
400
7,5
0
15 22,5 30 37,5 45
12,5
25
37,5
50
15
0
30 45 60 75 90
25
50
75
100
15
0
30 45 60 75 90
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
l/min
Δp (kPa)
Δp (kPa)
l/min l/min
Δp (kPa)
l/min
Δp (kPa)
Δp (kPa)
l/min
Δp (kPa)
l/min
CDCD
CC
CC
FDFD
MEME
FC
FC
FAFA
FB
FB
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FAFA FBFB
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FB
FBFAFA
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FB
FBFAFA
CD
CD
FD
FD
FC
FC
CC
CC
ME
ME
FB
FBFAFA
FRA 21-31-32-33
ERA 11 ERA 21
ERA 31 ERA 32
ERA 33
FRA 2
RETURN FILTERS
100
0
200 300 400 500 600
100
200
300
400
50
0
100 150 200 250 300
100 150 200 250 300
25
50
75
100
50
0
100 150 200 250 300
25
50
75
100
50
0
25
50
75
100
100
0
25
50
75
100
100
0
25
50
75
100
100
0
200 300 400 500 600
200 300 400 500 600200 300 400 500 600
25
50
75
100
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
l/min
Δp (kPa)
FDFD
CD
CD
CC
CC
MEME
FAFA
FB
FB
FC
FC
CC
CC
MEME
FC
FC
FD
FD
CD
CD
CC
CC
MEME
FAFA
FB
FB
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
MEME
FC
FC
FD
FD
CD
CD
CC
CC
FB
FBFAFA
MEME
FC
FC
FD
FD
CD
CD
CC
CC
MEME
FB
FBFAFA
FD
FD
FAFA
FB
FB
FC
FC
CD
CD
ERA 41-42-51-52-53-5D
ERA 41
ERA 51
ERA 53
ERA 52
ERA 5D
ERA 42
FRA 3
RETURN FILTERS
25
0
50 75 100 125 150
100
200
300
400
7,5
0
15 22,5 30 37,5 45
12,5
25
37,5
50
15
0
30 45 60 75 90
25
50
75
100
15
0
30 45 60 75 90
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
25
0
50 75 100 125 150
25
50
75
100
l/min
Δp (kPa)
Δp (kPa)
l/min l/min
Δp (kPa)
l/min
Δp (kPa)
Δp (kPa)
l/min
Δp (kPa)
l/min
CDCD
CC
CC
FD
FD
MEME
FC
FC
FAFA
FB
FB
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FAFA FBFB
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FB
FBFAFA
CD
CD
CC
CC
FD
FD
FC
FC
MEME
FB
FBFAFA
CD
CD
FD
FD
FC
FC
CC
CC
MEME
FB
FBFAFA
FRA 21-31-32-33
ERA 11 ERA 21
ERA 31 ERA 32
ERA 33
FRA 2
RETURN FILTERS
156
FRA
RETURN FILTERS
All the curves have been obtained with mineral oil having a kinematic viscosity
30 cSt and specic gravity 0,86 kg/dm3; for uids with dierent features, please
consider the factors described in the rst part of this catalogue. All the curves
are obtained from test done at the UFI FILTERS HYDRAULICS Laboratory,
according to the specication ISO 3968. In case of discrepancy, please check the
contamination level, viscosity and features of the uid in use.
N.B.
BYPASS VALVE PRESSURE DROP
When selecting the lter size, these curves must be taken into account if it is foreseen that any ow peak is to be absorbed by the bypass
valve, it also must be of proper conguration to avoid pressure peaks. The valve pressure drop is directly proportional to uid specic gravity