DBW30 Series Replacement Solenoid Operated Pressure Relief Valve provides pressure limiting and remote unloading for construction machinery, power units and industrial equipment. With pilot-operated control, up to 350 bar and 650 L/min, it helps prevent overpressure damage, pump overload, oil overheating and production stops. ISO 6264 subplate mounting and corrosion protection simplify retrofits where pressure control and uptime are essential.
1. Multiple Pressure Stages: Choose 50, 100, 200, 315 or 350 bar settings for application-specific hydraulic protection.
2. Flexible Connection Options: Select subplate mounting or threaded connection to match different system layouts.
3. Broad Size Coverage: Available in NG10, NG16, NG25 and NG32 configurations for different flow requirements.
4. Switching Shock Damping: Add optional damping to support smoother pressure unloading and reduce hydraulic impact.
5. International Compliance: CE and UKCA conformity with UR-marked solenoid components supports global equipment integration.
FAQ
Q1: What is a DBW30 solenoid operated pressure relief valve used for?
A: It limits hydraulic system pressure and allows the operating pressure to be unloaded remotely through an electrically controlled directional valve. It is commonly used in hydraulic power units, construction machinery, presses and heavy industrial equipment.
Q2: Why can't my hydraulic system reach the set pressure?
A: Check the pressure setting, pump condition, pilot orifice, balance hole, valve seat, spring and hydraulic oil cleanliness. Contamination, internal leakage, an incorrectly adjusted valve or a worn pump can all prevent the system from reaching pressure. Use a calibrated gauge near the relief valve inlet before replacing components.
Q3: Why does the relief valve chatter, make noise or overheat?
A: Chattering may result from contamination, unstable pilot pressure, incorrect adjustment, excessive return-line pressure or unsuitable oil viscosity. Recheck the relief setting, inspect the pilot circuit, measure return pressure and confirm that the oil meets the required viscosity and cleanliness range.
Q4: How do I choose the correct DBW30 replacement valve?
A: Match the valve size, required flow, pressure stage, ISO 6264 or threaded connection, solenoid voltage, connector, adjustment type, seal material and port pressure limits. The P/X pressure rating and Y/T back-pressure rating must be checked separately.
Q5: What causes a solenoid-operated relief valve to leak?
A: Leakage may be caused by worn seats, damaged seals, contamination, a weakened spring, incorrect assembly or misalignment. First confirm that the valve is correctly installed and adjusted. If leakage continues after cleaning and inspection, replace the worn valve or damaged internal parts.
Q6: Can a DBW30 valve reduce energy consumption during idle operation?
A: Yes, when correctly configured in an unloading circuit, the solenoid can unload pump pressure during idle periods and reduce unnecessary heat generation. The final result depends on the pump type, circuit design, unloading connection and control logic.
▶ Port P, X
