Артикул: RX7666
Proportional pressure reducing valve, direct operated 3DREP…XE
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Description
- Size 6
- Component series 2X
- Max. operating pressure 100 bar
- Flow, max. 15 l/min
- Area of application in accordance with the Explosion Protection Directive 2014/34/EU: II 2G; II 2D
- Type of protection valve:
– Ex h IIC T4 Gb X according to EN 80079-36
– Ex h IIIC T130°C Db X according to EN 80079-36 - Type of protection, solenoid coil:
– Ex eb mb IIC T4 Gb according to EN 60079-7 / EN 60079-18
– Ex tb IIIC T115°C Db according to EN 60079-31 - Solenoid coil certified according to IECEx
Features
- 3-way version
- For intended use in potentially explosive atmosphere
- For pressure control in ports A and B
- For subplate mounting
- Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole)
- Solenoid coil is rotatable by 90°
- Electrical connection as individual connection with cable gland
Product description
Valves of type 3DREP are direct operated 3-way pressure reducing valves with proportional solenoids. They convert an electrical input signal into a proportional pressure output signal.
The proportional solenoids are controllable wet-pin DC solenoids. The solenoids are actuated by external control electronics.
Set-up
The valve basically consists of:
- Housing (1) with connection surface
- Control spool (2) with pressure measuring pins (3 and 4)
- Solenoids (5 and 6) with central thread
Function
The pressure in A or B is set by means of the proportional solenoids. 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. When one proportional solenoid is actuated, e.g. solenoid "b" (5), the pressure measuring pin and 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 characteristic. With the surface of the pressure measuring pin (3), the pressure that builds up in channel A acts on the control spool (2) and against the solenoid force. The pressure measuring pin (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 to 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 the version "3DREP 6 C", only one solenoid may be actuated at a time.
Valve with two spool positions (Version "A" and "B")
The function of this valve version basically corresponds to the valve with three spool positions. This 2-spool position valve is, however, only equipped with solenoid "a" (6) or solenoid "b" (5). Instead of the second proportional solenoid, there is a plug screw (7).
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.
Type 3DREP 6..2X/..XE..
Type code
01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | |||
3DREP | 6 | ‒ | 2X | / | E | G24 | XE | J | / |
01 | Proportional pressure relief valve, direct operated | 3DREP |
02 | Size 6 | 6 |
Symbols | ||
03 | A | |
B | ||
C | ||
04 | Component series 20 … 29 (20 … 29: unchanged installation and connection dimensions) | 2X |
Pressure rating | ||
05 | 16 bar | 16 |
25 bar | 25 | |
45 bar | 45 | |
06 | Proportional solenoid | E |
Supply voltage of the control electronics | ||
07 | Direct voltage 24 V | G24 |
Explosion protection | ||
08 | “Increased safety”, for details, please refer to the "information on explosion protection" | XE |
Surface protection | ||
09 | Seawater-resistant, galvanized | J |
Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data") | ||
10 | NBR seals | M |
FKM seals | V |
Technical data
general
Size | 6 | ||
Installation position | any, preferably horizontal | ||
Earth | Version "A" and "B" | kg | 2.7 |
Version "C" | kg | 4.4 | |
Ambient temperature range | °C | -20 … +60 | |
Storage temperature range | °C | +5 … +40 | |
Maximum storage time | yrs | 1 | |
Surface protection | Galvanized |
hydraulic
Operating pressure range | Port P | Pressure rating 16 bar | bar | 20 … 100 |
Pressure rating 25 bar | bar | 30 … 100 | ||
Pressure rating 45 bar | bar | 50 … 100 | ||
Port T | bar | 0 ... 30 | ||
Hydraulic fluid | see table "Hydraulic fluid" | |||
Hydraulic fluid temperature range | NBR seals | °C | -20 … +80 | |
FKM seals | °C | -15 … +80 | ||
Viscosity range | Maximum admissible | mm²/s | 20 … 380 | |
Recommended | mm²/s | 30 … 46 | ||
Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1) | Class 17/15/12 | |||
Maximum flow P → A or P → B 2) | l/min | 15 |
1) | 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. |
2) | Δp = 50 bar; see characteristic curves |
Hydraulic fluid | Classification | Suitable sealing materials | Standards | Data sheet | |
Mineral oils | HL, HLP, HLPD, HVLP, HVLPD | NBR, FKM | DIN 51524 | 90220 | |
Bio-degradable | Insoluble in water | HETG | NBR, FKM | ISO 15380 | 90221 |
HEES | FKM | ||||
Soluble in water | HEPG | FKM | ISO 15380 | ||
Flame-resistant | Water-free | HFDU (glycol base) | FKM | ISO 12922 | 90222 |
HFDU (ester base) | FKM | ||||
HFDR | FKM | ||||
Containing water | HFC (Fuchs: Hydrotherm 46M, Renosafe 500; | NBR | ISO 12922 | 90223 | |
Important information on hydraulic fluids:
|
static / dynamic
Hysteresis | % | ≤ 6 |
Repetition accuracy | % | ≤ 2 |
Response sensitivity | % | ≤ 1 |
Range of inversion | % | ≤ 2 |
electrical
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 | |
Type of signal | analog | |
Maximum solenoid current | A | 1.03 |
Duty cycle | % | 100 |
Information on explosion protection
Area of application according to directive 2014/34/EU | II 2G | II 2D | |
Type of protection of the valve according to EN 13463-1/ EN 13463-5 1) | Ex h IIC T4 Gb X | Ex h IIIC T115°C Db X | |
Valve solenoid type of protection according to EN 60079-7 / EN 60079-18 | Ex eb mb IIC T4 Gb | Ex tb IIIC T115°C Db | |
Maximum surface temperature 2) | °C | 115 | |
Temperature class | T4 | - | |
Type examination certificate solenoid coil | BVS 20 ATEX E 009 X | ||
"IECEx Certificate of Conformity" solenoid coil | IECEx BVS 2007 X |
1) | Ex h: structural safety c according to EN 80079-37. |
2) | Surface temperature > 50 °C, provide contact protection. |
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, maximally 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 a frequency ≥160 Hz … max. 500 Hz may be used for operation.
- Connection lines must be passed in a strain-relieved way. The first mounting point must be within 150 mm of the cable and line entry.
- The maximum temperature of the surface of the valve jacket is 115 °C. This has to be considered when selecting the connection cable and/or contact of the connection cable with the surface of the jacket is to be prevented.
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
Nominal pressure dependent on the solenoid current
Δp-qV characteristic curves
Flow-dependent pressure
Symbols/Circuit diagrams
Simplified
Version "A"
Version "B"
Version "C"
Notice:
Representation according to ISO 1219-1.
Electrical connection
The type-examination tested solenoid coil of the valve is equipped with a terminal box, a type-examination tested cable entry and a type-examination tested blind plug.
The connection is polarity-independent.
Notice:
When establishing the electrical connection, the protective grounding conductor (PE) must be connected correctly.
Suppressor diode 47 V, 1.5 kW
1) | Recommended pre-fusecharacteristics: medium time-lag according to DIN 41571; 1.25 A |
Properties of the connection terminals and mounting elements
Position | Function | Connectable line cross-section |
1 | Operating voltage connection | Single-wire 0.75 … 2.5 mm2 Finely stranded,0.75 … 1.5 mm2 |
2 | Connection for protective earthing conductor | Single-wire 2.5 mm2 max. Finely stranded, 1.5 mm2 max. |
3 | Connection for potential equalization conductor | single-wire max. 6 mm2 Finely stranded, max. 4 mm2 |
Connection line
Line type | Non-armored and non-shielded connection lines | |
Temperature range | °C | ≤ -20 … ≥ +110 |
Line diameter | mm | 7 ... 10.5 |
Notice:
Only use finely stranded conductors if they have pressed-on wire end ferrules.
Over-current fuse and switch-off voltage peaks
Voltage data in the valve type code | Nominal voltage valve solenoid | Rated current valve solenoid | Rated current for external miniature fuse: Medium time-lag (M) according to DIN 41571 and EN/IEC 60127 | Rated voltage of external miniature fuse: Medium time-lag (M) according to DIN 41571 and EN/IEC 60127 | Maximum voltage value when switching off | Interference protection circuit |
G24 | 24 VDC | 1,03 ADC | 1,25 A | 250 V | –70 V | Suppressor diode bi-directional |
Notices:
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 short-circuit current of the supply source to be expected may amount to a maximum of 1500 A.
This fuse may only be installed outside the potentially explosive atmosphere or must be of an explosion-proof design.
When inductivities are switched off, voltage peaks result which may cause faults in the connected control electronics. For this reason, the solenoid coil comprise an interference protection circuit which dampens this voltage peak to the voltage value shown in the table.
Dimensions
Dimensions in mm
Required surface quality of the valve contact surface |
1 | Valve housing |
2 | Proportional solenoid "a" |
3 | Proportional solenoid "b" |
4 | Terminal box |
5 | Name plate |
6 | Identical seal rings for ports A, B, P, T |
7 | Plug screw for valve with one solenoid |
8 | Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole) |
9 | Space required to remove the solenoid coil |
Valve mounting screws (separate order)
Size | Quantity | Hexagon socket head cap screws | Material number |
6 | 4 | ISO 4762 - M5 x 50 - 10.9 (Friction coefficient μtotal = 0.09 … 0.14) Tightening torque MA = 7 Nm ±10 % | R913043758 |
Notice:
Only use valve mounting screws with the listed thread diameters and strength properties. Observe the screw-in depth.
Subplates (separate order) with porting pattern according to ISO 4401-03-02-0-05, see data sheet 45100.
Notices:
- 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.
- The dimensions are nominal dimensions which are subject to tolerances.
Installation conditions
(Dimensions in mm)
| Single assembly | Bank assembly |
Subplate dimensions | Minimum dimensions: | Minimum cross-section: |
Thermal conductivity of the subplate | ≥ 36,2 W/mK | |
Minimum distance between the longitudinal valve axes | ≥ 55 mm |
Dimensions in mm
Notice:
Please observe the "Special conditions for safe use".
Accessories
Control electronics
| Designation | Data sheet |
Valve amplifier for proportional valves without electrical position feedback; maximum current limitation 1 A | VT-MSPA2-2X/A5/1A0/000 | 30232-01 |
Module for monitoring and limiting the solenoid currents with proportional valves | VT-MUXA2-2-1X/V0/1A | 30290 |
A monitoring circuit is to be provided for the monitoring of the solenoid current. We recommend operating the valves with the assemblies described herein. The valve amplifier and the monitoring module may only be installed outside the potentially explosive atmosphere. |
Ordering codes
Currently eShop is not available. Please try again later.Downloads
Proportional pressure reducing valve, direct operated Data Sheet | RE29184-XE | 2021-02-01 | English | PDF | 644k Product Groups: Proportional pressure reducing valves Type 3DREP …XE | |
Proportional pressure reducing valve, direct operated Manual | RE29184-XE-B | 2020-12-01 | English | PDF | 2MB Product Groups: Proportional, high-response and servo valves Type 3DREP6..2X/...XE... | |
Explosion-protected hydraulic products for industrial and mobile applications Brochure | R999000373 | 2017-03-01 | English | PDF | 5.8MB Product Groups: Pumps, CD - single rod cylinder, Proportional, high-response and servo valves, Axial piston pumps, Mobile controls Product overview |
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