227
E 7.565.1/03.12
Pressure Filter DFM
with Differential Pressure
Relief Valve
up to 280 l/min, up to 400 bar
1. TECHNICAL
SPECIFICATIONS
1.1 FILTER HOUSING
Construction
The lter housings are designed
in accordance with international
regulations. They consist of a lter
head and a screw-in lter bowl.
Standard equipment:
differential pressure controlled relief
valve
connection for a clogging indicator
1.2 FILTER ELEMENTS
HYDAC lter elements are validated
and their quality is constantly
monitored according to the following
standards:
ISO 2941
ISO 2942
ISO 2943
ISO 3724
ISO 3968
ISO 11170
ISO 16889
Contamination retention capacities
in g
Betamicron
®
BH4HC
DFM 3 µm 5 µm 10 µm 20 µm
160 12.9 12.6 13.9 15.9
240 21.6 21.1 23.2 26.5
280 48.1 47.1 51.8 59.1
Filter elements are available with the
following pressure stability values:
Betamicron
®
(BH4HC): 210 bar
1.4 SEALS
NBR (= Perbunan)
1.5 INSTALLATION
As inline lter
1.6 SPECIAL MODELS AND
ACCESSORIES
With pressure release / oil drain plug
(SO184)
1.7 SPARE PARTS
See Original Spare Parts List
1.8 CERTIFICATES AND APPROVALS
On request
1.9 COMPATIBILITY WITH
HYDRAULIC FLUIDS ISO 2943
Hydraulic oils H to HLPD DIN 51524
Lubrication oils DIN 51517, API,
ACEA, DIN 51515, ISO 6743
Compressor oils DIN 51506
Biodegradable operating uids VDMA
24568 HETG, HEES, HEPG
Fire-resistant uids HFA, HFB, HFC
and HFD
Operating uids with high water
content (>50% water content) on
request
1.10 MAINTENANCE INSTRUCTIONS
Filter housings must be earthed.
When using electrical clogging
indicators, the electrical power supply
to the system must be switched off
before removing the clogging indicator
connector.
1.3 FILTER SPECIFICATIONS
Nominal pressure 400 bar
Fatigue strength At nominal pressure 10
6
cycles
from 0 to nominal pressure
Temperature range -30 °C to +100 °C
(-30 °C to -10 °C: p
max
= 200 bar)
Material of lter head EN-GJS-400-15
Material of lter bowl Steel
Type of clogging indicator VD (differential pressure measurement
up to 420 bar operating pressure)
Pressure setting of the clogging indicator 5 bar (others on request)
Cracking pressure of differential 20 bar (others on request)
pressure controlled relief valve NOTE:
On request, BN4HC elements
(pressure stability up to 20 bar) can
also be used at lower cracking
pressures.
Symbol for hydraulic systems
DFM 160 DFM 240 DFM 280
E 7.565.1/03.12
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DFM BH/HC 240 S E 10 D 1 . X /-L24
Filter type
DFM
Filter material of element
BH/HC Betamicron
®
(BH4HC)
Size of lter or element
DFM: 160, 240, 280
Operating pressure
S = 400 bar
Type and size of connection
Type Port Filter size
160 240 280
E G1 ¼
Filtration rating in µm
BH/HC : 3, 5, 10, 20
Type of clogging indicator
Y plastic blanking plug in indicator port
A steel blanking plug in indicator port
B visual
for other clogging indicators,
C electrical
see brochure no. 7.050../..
D visual and electrical
Type code
1
Modication number
X the latest version is always supplied
Supplementary details
L... light with appropriate voltage (24, 48, 110, 220 Volt) only for clogging
LED 2 light-emitting diodes up to 24 Volt indicators type "D"
SO184 pressure release/oil drain screw
V FPM seals
2. MODEL CODE (also order example)
2.1 COMPLETE FILTER
0240 D 010 BH4HC /-V
Size
0160, 0240, 0280
Type
D
Filtration rating in µm
BH4HC: 003, 005, 010, 020
Filter material
BH4HC
Supplementary details
V (for descriptions, see point 2.1)
2.2 REPLACEMENT ELEMENT
2.3 REPLACEMENT CLOGGING INDICATOR VD 5 D . X /-L24
Type
VD Diff. pressure indicator up to 420 bar oper. pressure
Pressure setting
5 standard 5 bar, others on request
Type of clogging indicator
D (see point 2.1)
Modication number
X the latest version is always supplied
Supplementary details
L..., LED, V (for descriptions, see point 2.1)
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3. FILTER CALCULATION /
SIZING
The total pressure drop of a lter at a
certain ow rate Q is the sum of the
housing ∆p and the element ∆p and is
calculated as follows:
∆p
total
=∆p
housing
+∆p
element
∆p
housing
= (see Point 3.1)
∆p
element
= Q •
SK*
•
viscosity
1000 30
(*see point 3.2)
For ease of calculation, our Filter
Sizing Program is available on request
free of charge.
NEW: Sizing online at www.hydac.com
3.1 ∆p-Q HOUSING CURVES BASED
ON ISO 3968
The housing curves apply to mineral
oil with a density of 0.86 kg/dm³ and
a kinematic viscosity of 30 mm²/s.
In this case, the differential pressure
changes proportionally to the density.
3.2 GRADIENT COEFFICIENTS (SK) FOR FILTER ELEMENTS
The gradient coefcients in mbar/(l/min) apply to mineral oils with a kinematic
viscosity of 30 mm²/s. The pressure drop changes proportionally to the change in
viscosity.
DFM 160/240/280
DFM BH4HC
3 µm 5 µm 10 µm 20 µm
160 16.8 10.4 5.9 4.4
240 10.6 6.8 3.9 2.9
280 5.7 3.4 1.8 1.6
∆p [bar]
Q [l/min]
BH4HC: DFM 160
∆p [bar]
BH4HC: DFM 240
∆p [bar]
Q [l/min]
BH4HC: DFM 280
Q [l/min]
230
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4. DIMENSIONS
NOTE
The information in this brochure relates to the operating conditions and
applications described.
For applications or operating conditions not described, please contact the relevant
technical department.
Subject to technical modications.
HYDAC FILTERTECHNIK GMBH
Industriegebiet
D-66280 Sulzbach/Saar, Germany
Tel.: 0 68 97 / 509-01
Fax: 0 68 97 / 509-300
Internet: www.hydac.com
E-mail: lter@hydac.com
DFM Weight incl.
element [kg]
Volume of
pressure
chamber [l]
160 11.0 0.6
240 12.5 0.8
280 17.1 1.45
hex SW32
DFM 160: ~ 235
DFM 240: ~ 291.5
DFM 280: ~ 477
clogging indicator
e.g. visual
lter inlet
lter outlet
mounting
3x M8x14
tank