Артикул: RX7693
Proportional pressure relief valve, direct operated, with integrated electronics (OBE) DBETE
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Description
- Size 6
- Component series 6X
- Maximum operating pressure 420 bar
- Maximum flow 2 l/min
Features
- Direct operated valve for limiting a system pressure
- Proportional solenoid operation
- Proportional solenoid with central thread and detachable coil
- For subplate mounting: Porting pattern according to ISO 4401
Product description
General information
Proportional pressure relief valves of type DBETE are remote control valves with seat design and integrated electronics (OBE) and are used for system pressure limitation. Operation by means of a proportional solenoid with central thread and detachable coil. 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 valves mainly consist of the housing (1), a proportional solenoid (2), the valve seat (3), the valve poppet (4) and the integrated electronics (6). Supply and command value voltage are applied at the connector (7). At the factory, the command value pressure characteristic curve is adjusted with little manufacturing tolerance.
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.
Type DBETE
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | |||
| DBET | ‒ | ‒ | 6X | / | G24 | XE | J | V | * |
| 01 | Proportional pressure relief valve with integrated electronics | DBETE |
| 02 | Component series 60 … 69 (60 … 69: unchanged installation and connection dimensions) | 6X |
| Maximum pressure rating | ||
| 03 | Up to 50 bar | 50 |
| Up to 100 bar | 100 | |
| Up to 200 bar | 200 | |
| Up to 315 bar | 315 | |
| Up to 350 bar | 350 | |
| Up to 420 bar | 420 | |
| 04 | Pilot oil return, internal | no code |
| Pilot oil return, external | Y | |
| 05 | Direct voltage 24 V | G24 |
| 06 | 1600 mA coil | no code |
| Electrical connection | ||
| 07 | Without mating connector; connector DIN EN 175201-804 | K31 |
| Electrical interface | ||
| 08 | Command value 0 … 10 V | A1 |
| Command value 4 to 20 mA | F1 | |
| Seal material | ||
| 09 | NBR seals | M |
| FKM seals | V | |
| Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) | ||
| 10 | Further details in the plain text | * |
Technical data
general
| Type | DBETE | |
| Size | 6 | |
| Component series | 6X | |
| Weight | kg | 2.15 |
| Installation position | any | |
| Ambient temperature range | °C | -20 … +50 |
hydraulic
| Type | DBETE | |||
| Maximum operating pressure | Port P | bar | 420 | |
| Return flow pressure | Port T (Y) | separate and depressurized to the tank | ||
| Maximum set pressure | Pressure rating 50 bar | bar | 50 | |
| Pressure rating 100 bar | bar | 100 | ||
| Pressure rating 200 bar | bar | 200 | ||
| Pressure rating 315 bar | bar | 315 | ||
| Pressure rating 350 bar | bar | 350 | ||
| Pressure rating 420 bar | bar | 420 | ||
| Minimum set pressure 1) | at a command value of 0 | See characteristic curves | ||
| Maximum flow 2) | l/min | 2 | ||
| Hydraulic fluid | see table | |||
| Hydraulic fluid temperature range | °C | +20 … +80 | ||
| Viscosity range | mm²/s | 20 … 380 | ||
| preferably | 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 according to ISO 4406 (c) | |||
| Hysteresis 4) | % | < 4 | ||
| Range of inversion 4) | % | < 0.5 | ||
| Response sensitivity 4) | % | < 0.5 | ||
| Linearity 4) | % | ± 3 | ||
| Manufacturing tolerance of the command value pressure characteristic curve, related to 0.8 l/min; pressure increasing | at command value 20 % 5) | % | < ± 1.5 | |
| at command value 100 % 4) | % | < ± 1.5 | ||
| Step response | 0% → 100% 6) | ms | 80 | |
| 100% → 0% 6) | ms | 80 | ||
| 1) | at command value 0 V or 4 mA |
| 2) | Observe flow limitation for pressure ratings 315, 350 and 420 bar. |
| 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. For the selection of the filters, see www.boschrexroth.com/filter. |
| 4) | Of the maximum set pressure |
| 5) | Of the maximum set pressure, zero point calibration at the factory |
| 6) | Line volume < 20 cm3; qV = 0.8 l/min; depending on the system |
| Hydraulic fluid | Classification | Suitable sealing materials | Standards |
| Mineral oils and related hydrocarbons | HL, HLP | NBR / FKM | DIN 51524 |
| Bio-degradable - insoluble in water | HEES | FKM | VDMA 24568 |
| Flame-resistant - water-free | HFDU | FKM | ISO 12922 |
| Flame-resistant - containing water | HFC (Fuchs HYDROTHERM 46M, Petrofer Ultra Safe 620) | NBR | ISO 12922 |
| Important information on hydraulic fluids: For more information and data on the use of other hydraulic fluids please contact us. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). The flash point of the process and operating medium used must be 40 K over the maximum solenoid surface temperature. Flame-resistant - containing water: Bio-degradable: When using hydraulic fluids that are simultaneously zinc-solving, zinc may accumulate (700 mg zinc per pole tube). | |||
electrical
| Type | DBETE | |||
| Minimum solenoid current | with 1600 mA - coil | mA | ≤ 100 | |
| with 800 mA - coil | mA | ≤ 100 | ||
| Maximum solenoid current | with 1600 mA - coil | mA | 1760 | |
| with 800 mA - coil | mA | 840 | ||
| Solenoid coil resistance | Cold value at 20 °C | with 1600 mA - coil | Ω | 5.5 |
| with 800 mA - coil | Ω | 20.6 | ||
| Maximum hot value | with 1600 mA - coil | Ω | 8.05 | |
| with 800 mA - coil | Ω | 33 | ||
| Duty cycle | % | 100 | ||
| Protection class according to DIN EN 60529 | IP65 (If a suitable and a correctly mounted mating connector are used.) | |||
| Power supply | V | 24 | ||
| Supply voltage range | V | 21 … 35 | ||
| Current consumption | A | 1.5 | ||
| Required fuse protection | 2, time-lag | |||
| Command value input | Voltage | V | 0 … 10 | |
| Current | mA | 4 … 10 | ||
| Actual value output | Voltage | V | 0 … 1,6 | |
| Current | A | 0 … 1,6 | ||
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
Pressure in port P dependent on the command value (flow = 0.8 l/min)
Current drop with increasing ambient temperature, 24 V and 100% duty cycle
| 1) | Notice: With increased temperature, the solenoid current will drop. Thus, the set pressure differs accordingly. |
Pressure rating 50 bar
Pressure rating 100 bar
Pressure rating 200 bar
Pressure rating 315 bar
| 1) | In case of characteristic curve 5, the command value may not exceed the maximum flow of 1.4 l/min |
Pressure rating 350 bar
| 1) | In case of characteristic curve 5, the command value may not exceed the maximum flow of 0.8 l/min |
Pressure rating 420 bar
| 1) | In case of characteristic curve 5, the command value may not exceed the maximum flow of 0.8 l/min |
Pressure rating 50 bar
Pressure rating 100 bar
Pressure rating 200 bar
Pressure rating 315 bar
Pressure rating 350 bar
Pressure rating 420 bar
Notice:
The characteristic curves were measured without counter pressure in port T. (Pt = 0 bar)
Minimum control current ≤ 100 mA
(This current is reached with a command value of 0 V and/or 4 mA.)
Symbols/Circuit diagrams
Pilot oil return, internal
Pilot oil return, external
Electrical connection
| Pin assignment | Contact | Assignment interface "A1" | Assignment interface "F1" |
| Power supply | A | 24 VDC (u(t) = 21 ... 35 V); Imax ≤ 1,5 A | |
| B | 0 V | ||
| Reference potential actual value | C | Reference contact F; 0 V | Reference contact F; 0 V |
| Differential amplifier input (command value) | D | 0 to 1.6 V actual value (1 mV ≙ 1 mA); | 4 ... 20 mA; Re = 100 kΩ |
| E | Reference potential command value | ||
| Measuring output (actual value) | F | 0 to 1.6 V actual value (1 mV ≙ 1 mA); | |
| PE | connected to solenoid and valve housing | ||
Connection cable
| 1) | Connection cable:- Recommendation 6-wire, 0.75 or 1mm2 plus protective earthing conductor and screening- Connect screening to PE on supply side only- Maximum admissible length 100 m The minimum supply voltage at the power supply unit depends on the length of the supply line (see diagram) |
Integrated electronics (OBE)
Function
The electronics are supplied with voltage via ports A and B. The command value is applied to the differential amplifier ports D and E.Via the characteristic curve generator, the command value solenoid current characteristic curve is adjusted to the valve so that non-linearities in the hydraulic system are compensated and thus, a linear command value pressure characteristic curve is created.The current controller controls the solenoid current independently of the solenoid coil resistance.The power stage of the electronics for controlling the proportional solenoid is a chopper amplifier with a clock frequency of approx. 180 Hz to 400 Hz. The output signal is pulse-width modulated (PWM). For checking the solenoid current, a voltage can be measured at the connector between pin F(+) and pin C(–) which is proportional to the solenoid current. 1 mV corresponds to 1 mA solenoid current.
Block diagram / pin assignment
Dimensions
Dimensions in mm
| 1 | Proportional solenoid |
| 2 | Valve housing |
| 3 | Integrated electronics (OBE) |
| 4 | Identical seal rings for ports A, B, P, and T |
| 5 | mating connector according to DIN EN 175301-803 |
| 6 | Space required to remove the mating connector |
| 7 | Cable fastening |
| 8 | Blind counterbores A and B |
| 9 | With version ..Y.. (external pilot oil return) port Y is internally connected to port T. Port T is not plugged. |
| 10 | Name plate |
| 11 | Block diagram: Integrated electronics (OBE) |
| 12 | Machined valve contact surface; porting pattern according to ISO 4401-03-02-0-05 |
Recommended valve mounting screws (separate order):
4 hexagon socket head cap screws ISO 4762 - M5 x 45 - 10.9-flZn-240h-L
Tightening torque MA = 7 Nm ± 10%; material no. R913000140
Accessories
Mating connectors for valves with round connector, 6-pole + PE
7P Z31
Mating connectors for valves with round connector, 6-pole + PE
7P Z31
- For valves with round connector according to EN 175201-804, 6-pole + PE as well as 6-pole, compatible with VG 95328
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