Артикул: RX7694
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Proportional pressure relief valve, direct operated DBET...XE
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Description
- Size 6
- Component series 6X
- Maximum operating pressure 420 bar
- Nominal flow 2 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 valve solenoid:
– Gas: eb (EN 60079-7), mb (EN 60079-18)
– Dust: tb (EN 60079-31) - IECEx certificate of conformity of the valve solenoid
Features
- For intended use in potentially explosive atmosphere
- For subplate mounting
- Porting pattern according to ISO 4401-03-02-0-05
- Wet-pin DC solenoid
- Electrical connection as individual connection and cable gland
- The external metal parts are galvanized to protect them against corrosion (seawater-resistant)
Product description
General information
Proportional pressure relief valves of type DBET...XE... are remote control valves with seat design and are used for system pressure limitation. Operation is effected by means of proportional solenoid. The interior of the solenoid is connected to port T or Y and is filled with the hydraulic fluid. Dependent on the electric command value, these valves can be used to steplessly set the system pressure to be limited.
The solenoids are controlled by an external amplifier of type VT-MSPA2…1A0 (data sheet 30232-01). The latter must not provide the solenoid with a current of more than 1.0 A. In order to achieve this prescribed safety when operating the valve in the potentially explosive area, the solenoid current must be monitored and limited. This is to be ensured by means of the VT-MUXA2 safety module (data sheet 30290).
Set-up
The valve basically consists of:
- Housing with connection surface (1)
- Proportional solenoid (2)
- Valve seat (3)
- Valve poppet (4
- Armature plunger (5)
Basic principle
For the setting of the system pressure, a command value is specified at the control electronics. Dependent on the command value, the electronics actuate the solenoid coil with electric current. The proportional solenoid converts the electric current into mechanical force that acts on the valve poppet (4) via the armature plunger (5). The valve poppet (4) pushes onto the valve seat (3) and blocks the connection between port P and T or Y. If the hydraulic force on the valve poppet (4) equals the solenoid force, the valve controls the set pressure by lifting the valve poppet (4) off the valve seat (3) and thus enabling hydraulic fluid to flow from port P to T or Y. If the command value is zero, the control electronics only apply the minimum control current to the proportional solenoid (2) and the minimum set pressure is set.
DBET...XE
DBET.../...Y...XE
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | |||
| DBET | ‒ | ‒ | 6X | / | G24 | XE | J | V |
| 01 | Proportional pressure relief valve | DBET |
| Solenoid position (facing the cable gland) | ||
| 02 | Position up | 1 |
| Position on the right | 2 | |
| Position down | 3 | |
| Position to the left | 4 | |
| 03 | Component series 60 … 69 (60 … 69: unchanged installation and connection dimensions) | 6X |
| Maximum pressure rating | ||
| 04 | 50 bar | 50 |
| 100 bar | 100 | |
| 200 bar | 200 | |
| 315 bar | 315 | |
| 350 bar | 350 | |
| 420 bar | 420 | |
| 05 | Pilot oil return, internal | no code |
| Pilot oil return, external (Y internally connected to T) | Y | |
| 06 | Direct voltage 24 V | G24 |
| Explosion protection | ||
| 07 | “Increased safety” explosion protection; for details, please refer to the information on explosion protection | XE |
| Surface protection | ||
| 08 | Sea water-resistant | J |
| Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data") | ||
| 09 | FKM seals | V |
Technical data
general
| Weight | kg | 2.7 |
| Installation position | any, preferably horizontal | |
| Ambient temperature range | °C | -20 … +70 |
| Storage temperature range | °C | -20 … +70 |
hydraulic
| Maximum operating pressure | Port P | bar | 420 |
| Blind counterbore A | bar | 350 | |
| Blind counterbore B | bar | 350 | |
| Return flow pressure | Port T (Y) | 0 bar (separate return line to tank) | |
| Maximum set pressure 1) | Pressure rating 50 bar | bar | 52.5 |
| Pressure rating 100 bar | bar | 105 | |
| Pressure rating 200 bar | bar | 210 | |
| Pressure rating 315 bar | bar | 330 | |
| Pressure rating 350 bar | bar | 370 | |
| Pressure rating 420 bar | bar | 420 | |
| Minimum set pressure | at a command value of 0 | see "characteristic curves" | |
| Maximum flow 2) | see "characteristic curves" | ||
| Hydraulic fluid | see table "Hydraulic fluid" | ||
| Hydraulic fluid temperature range | Maximum admissible | °C | -15 … +80 |
| Recommended | °C | +40 … +50 | |
| 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) 3) | Class 20/18/15 | ||
| 1) | At command value 10 V |
| 2) | If the maximum flow of the pressure rating is exceeded, a back pressure which exceeds the maximum nominal pressure of the valve may built up in port P. |
| 3) | 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. |
| Hydraulic fluid | Classification | Suitable sealing materials | Standards | Data sheet |
| Mineral oils | HL, HLP | FKM | DIN 51524 | 90220 |
| Important information on hydraulic fluids:
| ||||
static / dynamic
| Hysteresis 1) | % | < 8 | |
| Range of inversion 1) | % | < 0.5 | |
| Response sensitivity 1) | % | < 0.5 | |
| Linearity | see "characteristic curves" | ||
| Manufacturing tolerance of the command value pressure characteristic curve, related to 0.8 l/min; pressure increasing | at command value 20 % 2) | % | < ± 1.5 |
| at command value 100 % 3) | % | < ± 5 | |
| Step response Tu + Tg | 0% → 100% 4) | ms | 100 |
| 100% → 0% 4) | ms | 100 | |
| 1) | Of the maximum set pressure |
| 2) | Of the maximum set pressure, zero point calibration at the factory |
| 3) | Of the maximum set pressure, comparison at amplifier possible |
| 4) | Line volume < 20 cm3; qV = 0.8 l/min; depending on the system |
electrical
| Voltage type | Direct voltage; PWM signal 100 … 500 Hz | ||
| Type of signal | analog | ||
| Maximum solenoid current | A | 1 | |
| Limiting power | W | 13.5 | |
| Solenoid coil resistance | Cold value at 20 °C | Ω | 8.3 |
| Maximum hot value | Ω | 12.56 | |
| Duty cycle | % | 100 | |
| Maximum coil temperature | °C | 130 | |
| Protection class according to EN 60529 | IP67 (in mounted state) | ||
| Cable gland | Threaded connection | M20 x 1.5 | |
| Line diameter (three-wire with protective grounding conductor) | mm | 7 ... 12 | |
| Temperature rating | °C | -20 ... +130 | |
| Seal material | FKM | ||
| Line type | Cables and lines without shielding or sheathing | ||
| Required temperature rating quantities of the connection cable | °C | ≥ 115 | |
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 80079-36 1) | Gas | Ex h IIC T4 Gb X | |
| Dust | Ex h IIIC T130°C Db X | ||
| Maximum surface temperature 2) | 130 °C | ||
| Temperature class | T4 | ||
| Type of protection valve solenoid | According to EN 60079-7; 60079-18 | II2G Ex eb mb IIC T4 Gb | |
| According to EN 60079-31 | II2D Ex tb IIIC T130°C Db | ||
| Type examination certificate solenoid | IBExU 16 ATEX 1143 X | ||
| “IECEx Certificate of Conformity” for solenoid | IECEx IBE 16.0023X | ||
| 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
- 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.
- In case of bank assembly, only one solenoid of all valves may be energized at a time.
- Maximum admissible dust layer thickness ≤5 mm
Control electronics
| Amplifier in modular design | VT-MSPA2…1A0 (data sheet 30232-01) |
| Safety module | VT-MUXA2-2 (data sheet 30290) |
| For the electric circuit of valve, amplifier and safety module refer to data sheet 30290 and 30232-01. |
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
Pressure in port P (pp) depending on the command value
(measured with flow 0.8 l/min and amplifier VT-MSPA2…1A0 with safety module VT-MUXA2-2)
Pressure rating 50 bar
Pressure rating 100 bar
Pressure rating 200 bar
Pressure rating 315 bar
Pressure rating 350 bar
Pressure rating 420 bar
Comparison of the manufacturing tolerance
| 1) | The manufacturing tolerance can be compensated at the GW potentiometer of the upstream VT-MSPA2…1A0 amplifier. |
| 2) | Zero point calibration (set in the plant) |
Pressure in port P (pp) dependent on the flow
(Amplifier VT-MSPA2…1A0 with safety module VT-MUXA2-2)
Pressure rating 50 bar
| 1) | Flow limit of the pressure rating |
Pressure rating 100 bar
| 1) | Flow limit of the pressure rating |
Pressure rating 200 bar
| 1) | Flow limit of the pressure rating |
Pressure rating 315 bar
| 1) | Flow limit of the pressure rating |
Pressure rating 350 bar
| 1) | Flow limit of the pressure rating |
| 2) | Flow limit and maximum pressure |
| 3) | Theoretical characteristic curve at a flow < 0.2 l/min |
Pressure rating 420 bar
| 1) | Flow limit and maximum pressure |
| 2) | Theoretical characteristic curve at a flow < 0.2 l/min |
Notice:
The characteristic curves were measured without counter pressure in port T (pT = 0 bar).
Symbols/Circuit diagrams
Pilot oil return, internal
Pilot oil return, external
Electrical connection
The type-examination tested actuation solenoid of the valve is equipped with a terminal box and a type-tested cable gland. The connection is polarity-independent.
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 |
| multi-wire 0.75 … 1.5 mm2 | ||
| 2 | Connection for protective earthing conductor | Single-wire 2.5 mm2 max. |
| multi-wire max 1.5 mm2 | ||
| 3 | Connection for potential equalization conductor | single-wire max. 4 mm2 |
| multi-wire max. 4 mm2 | ||
| 4 | Screws for cover | - |
| 1) | Suppressor diode internally cast, type 1,5SMC220CA |
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 solenoid coil | Rated current Solenoid coil | 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 A | 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.
Dimensions
Dimensions in mm
 |
| Required surface quality of the valve contact surface |
| 1 | Proportional solenoid |
| 2 | Valve housing |
| 3 | Name plate |
| 4 | Identical seal rings for ports A, B, P, T |
| 5 | Terminal box |
| 6 | Blind counterbores A and B |
| 7 | With version ..Y.. (external pilot oil return) port Y is internally connected to port T. Port T is not plugged. |
| 8 | Machined valve contact surface; porting pattern according to ISO 4401-03-02-0-05 |
| 9 | Securing of the factory setting by locking wire |
| 10 | Mounting nut for solenoid |
Valve mounting screws (separate order)
| Size | Quantity | Hexagon socket head cap screws | Material number |
| 6 | 4 | ISO 4762 - M5 x 45 - 10.9 (Friction coefficient μtotal = 0.09 … 0.14) | R913048087 |
Notice:
Only use valve mounting screws with the listed thread diameters and strength properties. Observe the screw-in depth.
Installation conditions
(Dimensions in mm)
|
| Single assembly | Bank assembly |
| Subplate dimensions | Minimum dimensions: | Minimum cross-section: |
| Thermal conductivity of the subplate (referred to 300 °C) | ≥ 35,2 W/mK | |
| Minimum distance between the longitudinal valve axes | ≥ 55 | |
Dimensions in mm
Notice:
Please observe the "Special conditions for safe use".
Downloads
 | Proportional pressure relief valve, direct operated Data Sheet | RE29162-XE | 2020-12-01 | English, United States | PDF | 604k Product Groups: Direct operated Type DBET…XE |
| Proportional pressure relief valve direct operated Manual | RE29162-XE-B | 2020-10-01 | English | PDF | 1.9MB Product Groups: Proportional, high-response and servo valves Type DBET.../...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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