Артикул: RX7692
Pressure relief valves, direct operated, with direct current motor operation DBGT
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Description
- Size 6
- Component series 2X
- Maximum operating pressure 700 bar
- Maximum flow 12 l/min
Features
- Operation via DC motor with speed reduction transmission
- For subplate mounting: Porting pattern according to ISO 6264
- with actual value potentiometer
- Self-locking in case of power failure
- Direct operated valve for system pressure limitation
- For high pressure applications with a system pressure of up to 700 bar
‒ Suitable as pilot control valve for high pressure logic valves LCT / LFT
Product description
General information
Proportional pressure relief valves type DBGT can be controlled remotely and serve for variable setting and limitation of system pressures up to 700 bar. The system pressure is set by means of a DC motor with self-locking speed reduction transmission. This way, the set pressure is maintained in the event of a voltage failure. Pressure relief valves of this series include a main valve (1) and electric motor (2) with gear (3) as pressure adjustment element.
Functional description
The system pressure is set by means of a DC motor (2) with speed reduction transmission (3). The output shaft of the speed reduction transmission turns the cam (4) that adjusts the preload of the spring (6) via the spring plate (5) to cause a pressure change. The pressure applied to channel P acts on the valve poppet (7). If the hydraulic force on the valve poppet exceeds the spring force, the valve regulates the set pressure by lifting the valve poppet from the valve seat (8) to enable the flow of hydraulic fluid from connection P to T. The cam position (4) and the spring preload is reported back by the actual value potentiometer (9). The integrated amplifier type VT-VRM1-1 enables program control. If the power supply is interrupted (cable break, fuse defect, short-circuit, etc.), the pressure set at the valve remains unchanged.
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | ||
| DBGT | ‒ | 2X | / | 700 | V | P2 | * |
| 01 | Pressure relief valve, direct operated with DC motor actuation | DBGT |
| 02 | Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions) - Size 6 | 2X |
| Pressure rating | ||
| 03 | Set pressure up to 700 bar | 700 |
| Pilot flow | ||
| 04 | Pilot oil return, internal | no code |
| Pilot oil return, external | Y | |
| Seal material | ||
| 05 | FKM seals | V |
| 06 | Actual value potentiometer | P2 |
| 07 | Further details in the plain text | |
Technical data
general
| Type | DBGT | |
| Size | 6 | |
| Component series | 2X | |
| Weight | kg | 7.2 |
| Installation position | any | |
| Ambient temperature range | °C | -20 … +50 |
hydraulic
| Type | DBGT | |||
| Maximum operating pressure | Port P | bar | 700 | |
| Port T | bar | 10 | ||
| Maximum set pressure | Pressure rating 50 bar | bar | 700 | |
| Minimum set pressure | at a command value of 0 | qVnom - abhängig (siehe Kennlinien) | ||
| Maximum flow | l/min | 12 | ||
| Hydraulic fluid | see table | |||
| Hydraulic fluid temperature range | °C | -20 … +70 | ||
| Viscosity range | mm²/s | 2.8 … 380 | ||
| Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1) | Class 20/18/15 according to ISO 4406 (c) | |||
| Hysteresis 2) | % | < 6 | ||
| Repetition accuracy 3) | % | < 1 | ||
| 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. For the selection of the filters, see www.boschrexroth.com/filter. |
| 2) | Of the maximum set pressure |
| 3) | of the maximum set pressure, determined at Q = 3 l/min and a command value of 50% |
| 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). | |||
| 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 | DBGT | |
| Voltage type | Direct voltage | |
| Protection class according to DIN EN 60529 | IP65 (If a suitable and a correctly mounted mating connector are used.) | |
| Power supply | V DC | 24 |
| Nominal power according to VDE 0580 | W | 24 |
Adjustment with actual value potentiometer for cam position feedback: Ordering code “P2”
| Mechanical adjustment time, pmin to pmax | s | 1.1 | |
| Potentiometer | Resistance | kΩ | 5 |
| Power | W | 1.75 | |
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
DBGT-2X/700
The characteristic curves were measured without counter pressure in port T (pT = 0 bar).
Symbols/Circuit diagrams
Type DBGT-2X/...
Electrical connection
Connector connection at DBGT valve with actual value potentiometer
Dimensions
Dimensions in mm
| 1 | Valve housing |
| 2 | DC motor |
| 3 | “Y” port for “external” pilot oil return |
| 4 | Name plate |
| 5 | Valve mounting bores |
| 6 | Identical seal rings for ports A, B, P, and T |
| 7 | Blind counterbores A and B |
| 8 | Locking pin |
Recommended valve mounting screws (separate order):
- 4 hexagon socket head cap screws ISO 4762 - M6 x 80 - 10.9-flZn-240h-L
Tightening torque MA = 12.5 Nm ± 10%; material no. R913000512
Notice: For reasons of stability, exclusively these valve mounting screws may be used.
Accessories
Mating connectors for mechanical position switches, mechanical pressure switches and valves with central connection with connector “K6” and “DK6L”, 6-pole + PE
7P Z6
Mating connectors for mechanical position switches, mechanical pressure switches and valves with central connection with connector “K6” and “DK6L”, 6-pole + PE
7P Z6
- Mating connectors for mechanical position switches, mechanical pressure switches and valves with central connection with connector “K6”
Downloads
 | Pressure relief valve, direct operated, with DC motor actuation, Type DBGT Data Sheet | RE29143 | 2014-02-10 | English | PDF | 1.1MB Product Groups: Direct operated Type DBGT |
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