BOSCH REXROTH
3DREP6C-2X/25EG24XEJ/V
R901025350
Proportional Pressure Reducing Control Valves
Prop.press.valves: 3DREP* 6.-2x/
BOSCH REXROTH
MATERIAL: R901025350
SUMMARY: Prop.press.valves: 3DREP* 6.-2x/
Quantity in stock: 0
The 3-way pressure reducing valve type 3 DREP 6.. is direct operated by proportional solenoids. It converts an electrical input signal into a proportional pressure output signal.
The proportional solenoids are controllable wet-pin DC solenoids. The solenoids are controlled by external control electronics.
Set-up:
The valve basically consists of:
Housing (1) with connection surface Control spool (2) with pressure measuring pins (3, 4) Solenoids (5, 6) with central threadFunction:
The pressure in A or B is set by means of the proportional solenoids. The amount of the pressure depends on the current. The amount of the pressure depends on the current. With de-energized solenoids (5, 6), the control spool (2) is held in the central position by means of the compression springs (8). Ports A and B are connected with T so that the hydraulic fluid can flow off to the tank without obstructions. By energization of a proportional solenoid, e. g. solenoid “b" (5), the pressure measuring pin (4) and with it the control spool (2) are moved to the left. This opens the connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristics. With the surface of the pressure measuring pin (3) the pressure that builds up in channel A acts on the control spool and against the solenoid force. The pressure measuring spool (3) is supported by the solenoid "a". If the pressure exceeds the value set at solenoid “b”, the control spool (2) is pushed back against the solenoid force and connects A with T until the set pressure is achieved again. The pressure is proportional to the solenoid current.
When the solenoid is switched off, the control spool (2) is returned into the central position by the compression springs (8).
Notice:
Regarding valves of version 3DREP 6 C, only one solenoid may be actuated at a time.
Type 3DREP 6..2X/..XE..
Notice:
The tank line must not be allowed to run empty. With corresponding installation conditions, a preload valve (preload pressure approx. 2 bar) must be installed.
Valve with two spool positions (type 3DREP..A...):
The function of this valve version basically corresponds to the valve with three spool positions. The 2 spool position valve is, however, only equipped with solenoid "b" (5). Instead of the 2nd proportional solenoid, a plug screw (7) is installed.
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01 |
02 |
03 |
04 |
05 |
06 |
07 |
08 |
09 |
10 |
11 |
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3DREP |
6 |
‒ |
2X |
/ |
E |
G24 |
XE |
J |
/ |
* |
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01 |
Proportional pressure relief valve in 3-way version |
3DREP |
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02 |
Size |
6 |
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03 |
Symbols |
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Type 3DREP6 A 2X/.. |
A |
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Type 3DREP6 B 2X/.. |
B |
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Type 3DREP6 C 2X/.. |
C |
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04 |
Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions) - Size 6 |
2X |
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Pressure rating |
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05 |
16 bar |
16 |
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25 bar |
25 |
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45 bar |
45 |
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06 |
Proportional solenoid |
E |
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Power supply |
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07 |
Direct voltage 24 V |
G24 |
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08 |
“Increased safety” explosion protection; for details, please refer to the information on explosion protection |
XE |
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09 |
Surface protection |
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Seawater-resistant, galvanized |
J |
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Seal material |
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10 |
NBR seals |
M |
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FKM seals |
V |
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Observe compatibility of seals with hydraulic fluid used. |
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11 |
Further details in the plain text |
* |
general
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Type |
3DREP .../..XE | ||
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Size |
6 | ||
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Component series |
2X | ||
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Installation position |
any, preferably horizontal | ||
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Earth |
3DREP6 A/B |
kg |
2.7 |
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3DREP6 C |
kg |
4.4 | |
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Storage temperature range |
°C |
+5 … +40 | |
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Maximum storage time 1) |
yrs |
1 | |
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Ambient temperature range |
°C |
-20 … +60 | |
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Surface protection |
Galvanized | ||
| 1) | see operating instructions 29184-XE |
hydraulic
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Type |
3DREP .../..XE | |||
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Maximum operating pressure |
bar |
100 | ||
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Operating pressure range |
Port P |
Pressure rating 16 bar |
bar |
20 … 100 |
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Pressure rating 25 bar |
bar |
30 … 100 | ||
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Pressure rating 45 bar |
bar |
50 … 100 | ||
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Port T |
bar |
0 ... 30 | ||
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Maximum flow P → A or P → B 1) |
l/min |
15 | ||
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Hydraulic fluid |
see table | |||
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Hydraulic fluid temperature range (FKM seals) |
°C |
-15 … +80 | ||
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Hydraulic fluid temperature range (NBR seals) |
°C |
-20 … +80 | ||
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Viscosity range |
mm²/s |
20 … 380 | ||
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preferably |
mm²/s |
30 … 46 | ||
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Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 2) |
Class 17/15/12 | |||
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Hysteresis |
% |
≤ 6 | ||
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Repetition accuracy |
% |
≤ 2 | ||
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Response sensitivity |
% |
≤ 1 | ||
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Range of inversion |
% |
≤ 2 | ||
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Maximum surface temperature |
°C |
120 | ||
| 1) | Δp = 50 bar; see characteristic curves |
| 2) | The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. For the selection of the filters, see www.boschrexroth.com/filter. |
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Hydraulic fluid |
Classification |
Suitable sealing materials |
Standards |
Data sheet |
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Mineral oils |
HL, HLP, HLPD, HVLP, HVLPD |
NBR / FKM |
DIN 51524 |
90220 |
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Bio-degradable 1) |
Insoluble in water |
HETG |
FKM |
ISO 15380 |
90221 |
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HEES |
FKM |
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Soluble in water |
HEPG |
FKM |
ISO 15380 |
90222 |
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Flame-resistant 1) |
Water-free |
HFDU, HFDR |
FKM |
ISO 12922 |
90223 |
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Containing water |
HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) |
NBR |
ISO 12922 |
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Important information on hydraulic fluids: For more information and data on the use of other hydraulicfluids, please refer to the data sheets above or contact us. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). The ignition temperature of the hydraulic fluid used must be 50 K higher than the maximum surface temperature. |
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Flame-resistant - containing water: Maximum operating pressure 210 bar Maximum pressure differential per control edge 175 bar Pressure pre-loading at the tank port >20% of the pressure differential, otherwise increased cavitation erosion Life cycle as compared to operation with mineral oil HL, HLP 50 … 100% Maximum hydraulic fluid temperature 50 °CBio-degradable and flame-resistant: When using hydraulic fluids that are simultaneously zinc-solving, zinc may accumulate. |
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| 1) | Not recommended for corrosion-protected version "J" |
electrical
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Type |
3DREP .../..XE | |
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Voltage type |
Direct current or pulse-width modulated signal with a pulse voltage ≤ 28 V and a frequency ≥ 160 Hz up to max. 500 Hz | |
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Type of signal |
analog | |
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Maximum solenoid current |
A |
1.03 |
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Duty cycle |
% |
100 |
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Coil temperature |
°C |
120 |
Information on explosion protection
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Area of application according to directive 2014/34/EU |
II 2G |
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Type of protection of the valve according to EN 13463-1/ EN 13463-5 |
c T4 X |
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Valve solenoid type of protection according to EN 60079-7 / EN 60079-18 1) |
Ex e mb IIC T4 Gb |
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Type examination certificate solenoid |
KEMA 02ATEX2240 X |
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“IECEx Certificate of Conformity” for solenoid |
IECEx DEK 12.0068X |
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Special application conditions for a safe application |
– In case of bank assembly, only one solenoid of all valves may be energized at a time. ‒ In case of valves with two solenoids, only one of the solenoids may be energized at a time. ‒ Only direct current or a pulse-width modulated signal with a pulse voltage ≤ 28 V and frequency ≥ 160 Hz up to max. 500 Hz may be used. |
| 1) | Surface temperature > 50 °C, provide contact protection. |
Control electronics
|
Amplifier module for the control of explosion-proof proportional directional valves 4WRA...XE, 3DREP 6...XE and 4WRZ...XE |
VT-MSPA2-200-1X/V0/0 according to data sheet 30228-200 |
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Module for monitoring and limiting the solenoid currents with proportional valves |
VT-MUXA2-2-1X/V0/1A according to data sheet 30290 |
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Notice: |
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(measured with HLP46, ϑOil = 40 ±5 °C)
Pressure ratings 16, 25 and 45 bar
Pressure ratings 16, 25 and 45 bar
Flow-dependent pressure
Type 3DREP..6 A 2X/..E (detailed)
Type 3DREP..6 B 2X/..E (detailed)
Type 3DREP..6 C 2X/..E (detailed)
The type-examination tested valve solenoid is equipped with a terminal box and a type-tested cable gland. The connection is polarity-independent.
Notice:
Corresponding to the rated current, a fuse according to DIN 41571 and EN / IEC 60127 has to be connected upstream of every valve solenoid (max. 3 x Irated).
The shut-off threshold of the fuse has to match the prospective short-circuit current of the supply source.
The prospective short-circuit current of the supply source may amount to a maximum of 1500 A.
This fuse may only be installed outside the potentially explosive area or must be of an explosion-proof design.
Properties of the connection terminals and mounting elements
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Position |
Function |
Connectable line cross-section |
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1 |
Operating voltage connection |
Single-wire 0.75 … 2.5 mm2 |
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Finely stranded,0.75 … 1.5 mm2 |
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2 |
Connection for protective earthing conductor |
Single-wire 2.5 mm2 max. |
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Finely stranded, 1.5 mm2 max. |
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3 |
Connection for potential equalization conductor |
Single-wired, 4 … 6 mm2 |
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Finely stranded, 4 mm2 |
Cable gland
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Type approval |
II 2G Ex e IIC Gb |
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Threaded connection |
M20 x 1,5 |
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Protection class according to DIN EN 60529 |
IP66 (with correctly installed electrical connection) |
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Line diameter |
7 … 10,5 mm |
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Sealing |
Outer sheath sealing |
Connection line
|
Line type |
Non-armored cables and lines (outer sheath sealing) |
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Temperature range |
–30 … > +110 °C |
| 1) |
Recommended pre-fusecharacteristics: medium time-lag according to DIN 41571; 1.25 A |
Dimensions in mm
 |
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Required surface quality of the valve contact surface |
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1 |
Valve housing |
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2 |
Proportional solenoid "a" |
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3 |
Proportional solenoid "b" |
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4 |
Terminal box |
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5 |
Name plate |
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6 |
Identical seal rings for ports A, B, P, and T |
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7 |
Plug screw for valve with one solenoid |
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8 |
Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole) |
Valve mounting screws (separate order):
For reasons of stability, exclusively the following valve mounting screws are to be used:
4 hexagon socket head cap screws
ISO 4762 - M5 x 50 - 10.9-flZn-240h-L
(friction coefficient 0.09 – 0.14 according to VDA 235-101)
Tightening torque MA = 7 Nm ± 10 %,
Material no. R913000064
Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05, see data sheet 45100.
Notice:
Subplates are no components in the sense of directive 2014/34/EU and can be used after the manufacturer of the overall system has conducted an assessment of the risk of ignition. The "G...J3" versions are free from aluminum and/or magnesium and galvanized.
Installation conditions (dimensions in mm)
|
Single assembly |
Bank assembly |
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Subplate dimensions |
Minimum dimensions: |
Minimum cross-section: |
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Thermal conductivity of the subplate (EN-GJS-500-7) |
≥ 38 W/mK |
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Minimum distance between the longitudinal valve axes |
≥ 55 mm |
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Notice:
In case of bank assembly, only one solenoid of all valves may be energized at a time.
Schematic diagram
Dimensions in mm
