Function and configurationGeneralType DBE6X proportional pressure relief valves are pilot operated pressure relief valves.The internal pilot stage in the conical seat version and the main stage in the...
Product Detail
Function and configuration
General
Type DBE6X proportional pressure relief valves are pilot operated pressure relief valves.
The internal pilot stage in the conical seat version and the main stage in the spool version are located in the valve body. The valves are actuated by means of a proportional solenoid.
The solenoid is cushioned by restrictors in the armature to aid dynamic stability. The interior of the solenoid is connected to port T and is filled with pressure fluid. Bleeding is achieved by means of a screw plug. With these valves, the system pressure that needs to be limited can be infinitely adjusted in relation to the solenoid current.
Basic principle
To adjust the system pressure, a setpoint is set in the trigger electronics. Based on this setpoint, the electronics control the solenoid coil with regulated PWM (pulse-width-modulated) current.
The regulated current is additionally modulated with a dither, ensuring low hysteresis. The proportional solenoid converts the current to a mechanical force, which acts on a main spring in the pilot stage by means of the armature plunger. The pilot stage is supplied with pilot oil via a bore at <0.6 L/min. The "Pmax" pressure stage is determined by the cone and seating bore configuration.
Pressure limitation for maximum safety
If a fault occurs in the electronics, so that the solenoid current (Imax) would exceed its specified level in an uncontrolled manner, the pressure cannot rise above the level determined by the maximum spring force.
Ordering code
Symbols
Technical data
| General | |||
| Construction | Pilot stage | Poppet valve | |
| Main stage | Spool valve | ||
| Construction | Proportional solenoid without position control, external amplifier | ||
| Connection type | Subplate,mounting hole configuration NG6 (SIO 4401-03-02-094) | ||
| Mounting position | Optional | ||
| Ambient temperature range | ℃ | -20 to+50 | |
| Weight | Kg | 2.2 | |
| Vibration resistance, test condition | M lax. 25 g, shaken in 3 dimensions (24 h) | ||
| Hydraulic (measured with HLP 46, 0oil=40℃±5℃) | ||||||
| Pressure fluid | Hydraulic oil to DIN 51524...535, other fluids after prior consultation | |||||
| Viscosity range | recommended | m㎡/s | 20...100 | |||
| max.permitted | m㎡/s | 10...800 | ||||
| Pressure fluid temperature range | ℃ | -20...+80 | ||||
| Maximum permitted degree of contamination of pressure fluid Purity class to ISO 4406 (c) | Class 18/16/13 | |||||
| Direction of flow | See symbol | |||||
| Max. set pressure (at Qmax=1 L/min) | bar | 80 | 180 | 250 | 315 | |
| Min. pressure (at Qmin=1 L/min) | bar | 7 | 8 | 9 | 10 | |
| Max.working pressure | bar | Port P:315 | ||||
| Port T:250 | ||||||
| Max. mechanical pressure limitation level, e.g.when solenoid current |>|max | bar | <90 | <190 | <260 | <325 | |
| Pilot oil flow | L/min | Approx.0.6 | ||||
| Max.flow | L/min | 40 | ||||
| Cyclic duration factor | % | 100 ED | |
| Degree of protection | IP 65 to DIN 40050 and IEC 14434/5 | ||
| Solenoid connection | Plug-in connector to DIN 43650/ISO 4400, M16X1.5(2P+PE) | ||
| Valve with solenoid type | 0.8A | 2.5A | |
| Max. solenoid current | Imax | 0.8A | 2.5A |
| Coil resistance R20 | Ω | 22 | 3 |
| Max. power consumption at 100% load and operating temperature | VA | 25 | 30 |
| Static/Dynamic | ||
| Hysteresis | % | ≤4 |
| Range of inversion | % | ≤3 |
| Manufacturing tolerance for Pmax | % | ≤10 |
| Response time 100% signal change | ms | On 200/Off<250 |
Valve with external trigger electronics
Characteristic curves(measured with HLP46, oil=40°C +5°C)
Unit dimensions
