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Description
- Size 6
- Component series 1X
- Maximum operating pressure 315 bar
- Nominal flow 1 l/min
- Maximum flow 1.5 l/min
Features
- Subplate mounting
- Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole)
- Adjustable by solenoid current
- Solenoid variants Imax = 0.8 A oder 2.5 A
- Maximum pressure limitation, even with defective electronics
- External control electronics with ramp and valve calibration
Product description
General information
Proportional pressure relief valves type DBETX are remote control valves (pilot control valves) in poppet seat design. They are used for limiting a system pressure.
Operation is effected by means of a proportional solenoid.
The interior of the solenoid is connected to port T and is filled with the hydraulic fluid.
These valves enable stepless adjustment of the system pressure to be limited by means of control electronics dependent on the solenoid current and at a flow ≤1 l/min remaining as constant as possible.
The valves mainly consist of the housing (1), a proportional solenoid (2), the valve seat (3) and the valve poppet (4).
Basic principle
For the setting of the system pressure, a command value is specified at the control electronics.
Dependent on the command value, the solenoid coil is actuated by the electronics by means of a regulated PWM current (pulse width modulation). The proportional solenoid (2) converts the current into mechanical force that acts on the main spring (5) via the armature plunger. The compression spring (6) between poppet (4) and valve seat (3) supports stability and minimum residual pressure. The spring force at the poppet (4) and the pressure in the valve seat (3) are balanced at constant oil flow (0,7 … 1 l/min). The maximum pressure rating is defined by the configuration of the poppet/seat bore.
Maximum pressure limitation
In case of failure or defect of control electronics and uncontrolled exceeding of the solenoid current (Imax), the maximum spring force remains decisive for pressure limitation.
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | |||
| DBET | X | ‒ | 1X | / | G24 | ‒ | N | Z4 | M | * |
| 01 | Proportional pressure relief valve | DBET |
| 02 | Porting pattern according to ISO 4401-03-02-0-05 | X |
| 03 | Component series 10 ... 19 (10 ... 19: unchanged installation and connection dimensions) - Size 10 | 1X |
| Maximum pressure rating | ||
| 04 | 50 bar | 50 |
| 80 bar | 80 | |
| 180 bar | 180 | |
| 250 bar | 250 | |
| 315 bar | 315 | |
| Power supply | ||
| 05 | Direct voltage 24 V | G24 |
| Maximum solenoid current | ||
| 06 | 0,8 A | 8 |
| 2,5 A | 25 | |
| 07 | With manual override | N |
| Electrical connection | ||
| 08 | 3-pole connector (2+PE) according to DIN EN 175301-803 | Z4 1) |
| Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data") | ||
| 08 | NBR seals | M |
| 09 | Further details in the plain text | * |
| 1) | Mating connector included in the scope of delivery |
Technical data
(For applications outside these values, please consult us!)
general
| Type | DBETX | |
| Size | 6 | |
| Weight | kg | 1.9 |
| Installation position | any | |
| Ambient temperature range | °C | -20 … +50 |
| Maximum vibration resistance | 25 g, room vibration test in all directions (24 h) |
hydraulic
| Maximum operating pressure | Port P | bar | 315 | ||||
| Port T | bar | 250 | |||||
| Maximum set pressure | bar | 50 | 80 | 180 | 250 | 315 | |
| Maximum pressure limitation, mechanical 1) | bar | < 55 | < 85 | < 186 | < 258 | < 325 | |
| Minimum set pressure | see "characteristic curves" | ||||||
| Nominal flow | l/min | 1 | |||||
| Maximum flow | l/min | 1.5 | |||||
| Hydraulic fluid | see table "Hydraulic fluid" | ||||||
| Hydraulic fluid temperature range | °C | -20 … +80 | |||||
| Viscosity range | Recommended | mm²/s | 20 … 100 | ||||
| Maximum admissible | mm²/s | 10 … 800 | |||||
| Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 2) | Class 18/16/13 | ||||||
| 1) | e. g. at solenoid current I > Imax |
| 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. |
| Hydraulic fluid | Classification | Suitable sealing materials | Standards | Data sheet | |
| Mineral oils | HL, HLP | NBR, FKM | DIN 51524 | 90220 | |
| Bio-degradable | Insoluble in water | HETG | 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 | % | ≤ 4 | |
| Range of inversion | % | ≤ 3 | |
| Manufacturing tolerance | % | ≤ 10 | |
| Actuating time 1) | ON | ms | 60 |
| OFF | ms | 70 | |
| 1) | 100% signal step |
electrical
| Maximum solenoid current | A | 0.8 | 2.5 |
| Solenoid coil resistance | Ω | 22 | 3 |
| Maximum power consumption 1) | A | 25 | 30 |
| Relative duty cycle | % | 100 | |
| Protection class according to EN 60529 | IP65 (If a suitable and a correctly mounted mating connector are used.) | ||
| 1) | at 100 % load and operating temperature |
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
Pressure in port P dependent on the command value
(Rated flow 1 l/min)
| 1) | Zero adjustment |
| 2) | Sensitivity adjustment |
| 3) | pmin ≤ 3 % pmax |
Symbols/Circuit diagrams
Dimensions
Dimensions in mm
| Required surface quality of the valve contact surface |
| 1 | Name plate |
| 2 | Mating connectors for valves with connector "K4" (included within the scope of delivery) |
| 3 | Identical seal rings for ports A, B, P, T |
| 4 | Space required to remove the mating connector |
| 5 | Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole) Deviating from the standard: Ports P, A, B, T Ø8 mm Minimum screw-in depth: |
Valve mounting screws (separate order)
| Size | Quantity | Hexagon socket head cap screws | Material number |
| 6 | 4 | ISO 4762 - M5 x 30 - 10.9-CM-Fe-Zn-5-An-T0-H-B (Friction coefficient μtotal = 0.09 … 0.14) Tightening torque MA = 7 Nm ±10 % | R913022141 |
Accessories
Valve amplifiers for proportional directional valves and proportional pressure valves
VT-VSPA1-508-1X/V0/RTP
Valve amplifiers for proportional directional valves and proportional pressure valves
VT-VSPA1-508-1X/V0/RTP
- Component series 1X
- Analog, Euro-card format
- For valves: DBETX, DBE, DRE
Valve amplifiers for proportional directional, proportional pressure and proportional flow control valves
VT-VSPA1-525-1X/V0/RTP
Valve amplifiers for proportional directional, proportional pressure and proportional flow control valves
VT-VSPA1-525-1X/V0/RTP
- Component series 1X
- Analog, Euro-card format
- For valves: DBETX, DBE, 2FREX, 3FREX, 4WRBA
Valve amplifiers for proportional pressure valves
VT-SSPA1-508-2X
Valve amplifiers for proportional pressure valves
VT-SSPA1-508-2X
- Component series 2X
- Analog, Connector design
- For valves:
DBETX-1X...-8, DRE10Z-1X...-8, DRE6X-1X...-8, DBE6X...1X...-8, DBE10Z-1X...-8
Valve amplifiers for proportional pressure and flow control valves
VT-SSPA1-525-2X
Valve amplifiers for proportional pressure and flow control valves
VT-SSPA1-525-2X
- Component series 2X
- Analog, Connector design
- For valves:
DBETX-1X...-25, DBE6X-1X...-25, 3(2)FREX...-1X...-25
Valve amplifier for proportional valves without electrical position feedback
VT-MSPA
Valve amplifier for proportional valves without electrical position feedback
VT-MSPA
- Component series 2X
- Suitable for controlling proportional valves and pump controls without electric position feedback
- Easy valve selection of the Rexroth valves for the industrial hydraulics
- Characteristic curves of the valves stored in the device
- Valve optimization via push-buttons
Downloads
 | Proportional pressure relief valve, direct-operated Data Sheet | RE29161 | 2019-03-01 | English | PDF | 266k Product Groups: Direct operated Type DBETX |
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