Stauff Hydraulic FiltrationâReturn Line Filter RTF20
Stauff Hydraulic FiltrationâReturn Line Filter RTF20
Stauff Hydraulic FiltrationâReturn Line Filter RTF20
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Return <strong>Line</strong> <strong>Filter</strong> <strong>RTF20</strong> Technical Data<br />
Technical Data<br />
STAUFF <strong>RTF20</strong> series return filters are designed<br />
as tank top filters with a maximum operating<br />
pressure of 10 bar (145 PSI) and flows up to<br />
115 l/min (30 US GPM). The filter bowl is<br />
designed to return the oil beneath the surface<br />
thus preventing entrainment of air. <strong>RTF20</strong> series<br />
compact design and integral breather make<br />
them ideal for mobile hydraulic applications.<br />
FILTRATION<br />
Technical Specification<br />
Construction<br />
<strong>Filter</strong> head<br />
Element bowl<br />
and screw cap<br />
Tank top flange mounting<br />
Die cast aluminium<br />
Polyamide<br />
Seals “O”-Rings NBR (Buna-N ® )<br />
FPM (Viton ® )<br />
Integrated breather <strong>Filter</strong> paper 10 or 40 µm<br />
By-pass valve<br />
(integrated in the<br />
filter element)<br />
Allows unfiltered oil to by-pass<br />
the contaminated element<br />
once the opening pressure has<br />
been reached<br />
Opening pressure<br />
1.7 bar (25 PSI)<br />
Port connections<br />
Flow rating<br />
BSP, NPT, SAE “O”-Ring thread<br />
up to 115 l/min (30 US GPM) for<br />
32 cSt (150 SUS) fluids<br />
Clogging indicators<br />
Gauge indicator 0-6.9 bar<br />
(0-100 PSI) with colored segments<br />
Electrical, 0.35 - 2.5 bar<br />
(5-35 PSI) adjustable<br />
Operating pressure<br />
max 10 bar (145 PSI)<br />
<strong>Filter</strong> elements<br />
Flow characteristics see page F83<br />
Test pressure<br />
Temperature range<br />
min 24 bar (350 PSI)<br />
-25°C to +100°C<br />
(-13°F to +212°F)<br />
Media<br />
Mineral oils,<br />
other fluids on request<br />
F80
Return <strong>Line</strong> <strong>Filter</strong> <strong>RTF20</strong> Dimensions<br />
Dimensions<br />
ø75<br />
(2.95)<br />
1 /2 " or 3 / 4 " BSP, NPT<br />
or SAE port<br />
24<br />
(0.94)<br />
202<br />
(7.95)<br />
41<br />
(1.61)<br />
G 1 / 8 or 1 / 8 " NPT<br />
port for clogging<br />
indicator (both sides)<br />
2<br />
(0.07)<br />
ø61,5 ± 1,5<br />
(2.42 ± 0.06)<br />
16<br />
FILTRATION<br />
77<br />
(3.03)<br />
11<br />
(0.43)<br />
178<br />
(0.63)<br />
(7.01)<br />
ø28<br />
(1.1)<br />
Mounting detail<br />
(bottom view)<br />
50<br />
(1.97)<br />
70<br />
(2.76)<br />
88<br />
(3.46)<br />
82<br />
(3.23)<br />
Dimensions in mm (inch)<br />
F81
Return <strong>Line</strong> <strong>Filter</strong> <strong>RTF20</strong> Ordering Code<br />
Ordering Code <strong>Filter</strong> Housings<br />
<strong>RTF20</strong> N1 ... B V B10 D /X<br />
<strong>Filter</strong> Type<br />
<strong>RTF20</strong><br />
Design Code<br />
only for information<br />
Connection Style<br />
Code Connection Style<br />
B1 BSP G 1 / 2<br />
B2 BSP G 3 / 4<br />
N1 NPT<br />
1 /2<br />
N2 NPT<br />
3 /4<br />
S1 SAE- “O”- Ring Thread<br />
3 /4 -16 UN<br />
S2 SAE- “O”- Ring Thread 1 1 / 16 -12 UN<br />
For Complete <strong>Filter</strong>s:<br />
identification filter material<br />
+ micron rating code<br />
(see ordering code filter elements below)<br />
Dipstick<br />
- Without dipstick<br />
D Dipstick<br />
Breather<br />
B10 10 µm <strong>Filter</strong> paper<br />
B40 40 µm <strong>Filter</strong> paper<br />
Clogging Indicator<br />
N without clogging indicator<br />
V visual<br />
E electrical<br />
See page F88 for more details on the indicator options.<br />
FILTRATION<br />
Ordering Code <strong>Filter</strong> Elements<br />
RTE20 D 10 B /X<br />
Seal Material<br />
B NBR (Buna-N ® )<br />
V FPM (Viton ® )<br />
Series<br />
RTE20<br />
Design Code<br />
only for information<br />
<strong>Filter</strong> Material<br />
Micron ratings<br />
Code Material<br />
available<br />
D <strong>Filter</strong> paper 10<br />
G Inorganic glass fiber 6,10,20<br />
Seal Material<br />
B NBR (Buna-N ® )<br />
V FPM (Viton ® )<br />
Micron Rating<br />
Code Rating<br />
06 6 µm<br />
10 10 µm<br />
20 20 µm<br />
F82
Return <strong>Line</strong> <strong>Filter</strong> <strong>RTF20</strong> Flow Characteristics<br />
Flow Characteristics<br />
The following characteristics are valid for mineral based fluids with a density of 0,85 kg/dm 3 and the kinematic<br />
viscosity of 30 mm 2 /s. The characteristics have been determined in accordance to ISO 3968. Multipass filter<br />
ratings have been obtained in accordance to ISO 16889. Consult factory for details.<br />
∆p in PSI<br />
1.5<br />
1.2<br />
∆p in bar<br />
0.1<br />
0.08<br />
<strong>Filter</strong> Housing<br />
<strong>RTF20</strong><br />
7.5<br />
6<br />
∆p in PSI<br />
∆p in bar<br />
0.5<br />
0.4<br />
G06<br />
G10<br />
<strong>Filter</strong> Elements<br />
RTE20<br />
G20<br />
D10<br />
∆p in PSI<br />
∆p in bar<br />
1.5 0.10<br />
1.2 0.08<br />
<strong>Filter</strong> Breather<br />
<strong>RTF20</strong><br />
B10<br />
B40<br />
0.9<br />
0.6<br />
0.06<br />
0.04<br />
1 /2 ” 3 /4 ”<br />
4.5<br />
3<br />
0.3<br />
0.2<br />
0.9<br />
0.6<br />
0.06<br />
0.04<br />
0.3<br />
0.02<br />
1.5<br />
0.1<br />
0.3<br />
0.02<br />
0<br />
0.0<br />
0 50 100 150 Q in l/min<br />
0<br />
0.0<br />
0 40 80 120 Q in l/min<br />
0.0<br />
0.0<br />
0 40 80 120 160 200 240<br />
Q in l/min<br />
0 12.5 25 37.5 Q in US GPM<br />
0 10 20 30 Q in US GPM<br />
0 10 20 30 40 50 60 Q in US GPM<br />
FILTRATION<br />
F83
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