Function and configurationThe type DBET proportional pressure relief valves are remoted controled valves with poppet valve design and are used to limit the pressure of the system. They are actuated by...
Product Detail
Function and configuration
The type DBET proportional pressure relief valves are remoted controled valves with poppet valve design and are used to limit the pressure of the system. They are actuated by a proportional solenoid. With these valves, the system pressure to be limited can be set infinitely in relationship to the electrical command value.
These valves mainly consist of the housing (1), a proportional solenoid (2), the valve seat (3) and the valve poppet (4).
The proptional solenoid converts electrical current proportionally into mechanical force. An increase in the current causes a proportionally higher solenoid force. The armature chamber of the solenoid is filled with pressure fluid and is pressure tight.
The setting of the system pressure is a carried out command value dependent from the proportional solenoid (2). The solenoid force pushes the valve poppet (4) onto the seat (3). The pressure present in port P of the system acts on the valve poppet (4) and thus against the force of the proportional solenoid. If the hydraulic force on the valve poppet (4) is equal to the solenoid force then the valve controls the set pressure by lifting the valve poppet off the valve seat (3), and thus permitting pressure fluid to flow from P to T. The minimum setting pressure is set with minimum control current related to the zero command value.
Ordering code
Technical data
| Pressure fluid | Mineral oils (HL, HLP) to DIN 51 524 | |
| Further pressure fluids on request! | ||
| Pressure fluid temperature range ℃ | -30 to +80 (NBR) | |
| -20 to+80(FKM) | ||
| Viscosity range m㎡/s | 15 to 380 | |
| Degree of contamination | Maximum permissible degree of fluid contamination: Class 9. NAS 1638 or 20/18/15, ISO4406 | |
| Operating pressure (port P) bar | 350 | |
| Max. set pressure bar | 50;100;200;315;350 | |
| Min.settable pressure | see characteristic curves | |
| Min. settable pressure at 0 command value | =Min. settable pressure | |
| Return pressure (port T) bar | Separate and at zero pressure to tank | |
| Max.Flow L/min | 2 | |
| Linearity | ±3.5% of max. settable pressure | |
| Hysteresis (See setting pressure characteristic curve) | ±1.5% of max. settable pressure | |
| Repeatability | <±2% of max. settable pressure | |
| Switching time | ms | 30 bis 150 (system dependent) |
| Electrical | ||
| Supply voltage | 24V DC | |
| Min.control current | mA | 100 |
| Max.control current | mA | 800 |
| Coil resistance | 5.5Ω Cold value at 20℃; Max. warm value:8.05Ω | |
| Duty | Continuous | |
| Electrical connections | Plug-in connector to DIN EN 175301-803/ISO 4400 | |
| Valve protection to DIN 40 050 | IP 65 | |
| Amplifier | VT-2000 or VT-SSPA1-...-L2X | |
Characteristic curves(measured with HLP46, oil =40°C +5°C)
Characteristic curves(measured with HLP46, oil =40°C +5°C)
Unit dimensions
