Proportional Pressure Relief Valve DBEM
The pilot-operated proportional relief valve DBEM is a pilot-operated relief valve equipped with an integrated electronic component (OBE). It is primarily used to limit the working pressure of hydraulic systems and provide stepless adjustment of system pressure through electrical control signals. This proportional valve features precise control characteristics, stable pressure, and good dynamic response, making it widely used in various hydraulic systems that require precise pressure control.
Product parameter of Proportional Pressure Relief Valve DBEM
| Hydraulic data | ||||
| Max.operating pressure Ports A. B and X (MPa) | 31.5 | |||
| Return pressure (MPa) | Port Y, separate and at zero pressure to tank | |||
| Max. settable pressure (MPa) | 5. 10. 20. 31.5 same as pressure stage | |||
| Min. settable pressure (MPa) | see characteristic curves | |||
| Max. pressure safety (MPa) | settable pressure | |||
| 5 | 10 | 20 | 31.5 | |
| 1to 62 | 1to 122 | 1 to 222 | 1to 342 | |
| Max. flow (L/min) | 10 | 20 | 30 | |
| 200 | 400 | 600 | ||
| Pilot flow (L/min) | 0.7 to 2 | |||
| Linearity (%) | ±3.5 | |||
| Repeatability (%) | <±2 | |||
| Typical variation (%) | < ±2 Max. pressure | |||
| Hysteresis (%) | With surge ± 1.5 of Max.pressure.Without surge ± 4.5 of Max.pressure | |||
| Switching time | 30 to 150 | |||
| Pressure fluid | Mineral oil(for NBR seal), Phosphate ester (for FPM seal) | |||
| Viscosity range (mm2/s) | 2.8 to 380 | |||
| Pressure fluid temperature range(℃) | -20 to+70 | |||
| Degree of contamination(μm) | ≤20(recommendation 10) | |||
| Electrical technical data | |
| Amplifier | VT-200g40 supplied with valve together |
| Supply voltage | DC |
| Min.control current (A) | 0.1 |
| Max.control currenl (A) | 0.8 |
| Coil resistance（Ω） | Cold value at 20℃ is 19.5; Max.wam value is 28.8 |
| Pressure fluid temperature range(℃) | +50 |
| Working state | Continue |
| Valve protection | IP65 |
| Electrical connections | plug |
Features:
▶For subplate mounting
▶Encased in block
▶Optional additional maximum pressure limitation by means of a spring loaded pilot control valve
▶Valve and electronic control form one source
Application:
The pilot-operated proportional relief valve DBEM is widely used in various hydraulic systems that require precise pressure control, such as injection molding machines, die-casting machines, and hydraulic presses. In these applications, the DBEM valve ensures stable operation of the hydraulic system and improves production efficiency.
These valves basically consist of the pilot control valve (1) with proportional solenoid (2) and the main valve (3) with main spool insert (4).
Type DBE:
The adjustment of the pressure is command value dependent via a proportional solenoid (2). The pressure present in port A acts on the underside of the main spool (4). At the same time this pressure acts on the spring loaded side of the main spool (4) via orificies (5). The hydraulic force acts on the pilot poppet (6). When the hydraulic force over comes the solenoid force then the pilot poppet (6) opens. Due to the fact that the pilot oil can now flow to tank via port Y, a pressure drop occurs at the main spool (4) which acts on the main spool and lifts it against the force of the return spring . The connection from A to B is opened and there is no longer any increase in pressure
Type DBEM:
Optionally the valve can be supplied with an additional spring loaded pilot control valve for maximum pressure safety (redundant pressure safety)
Structure of Proportional Pressure Relief Valve DBEM
Address
No. 27, Yangsha Road, Huilong Town, Qidong City, Jiangsu Province, China
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