DBW Series Solenoid Relief Valve | DBW20 | DBW30 | 200/315 Bar | Pilot Operated Unloading Valve

DBW Series Pilot-Operated Solenoid Relief Valves

Product Overview: The DBW series is a high-performance pilot-operated relief valve featuring an integrated solenoid directional valve for sophisticated pressure control and system unloading. It functions as a safety valve to limit system pressure and, through electrical signals, allows the system to circulate oil back to the tank at minimum pressure (unloading). This feature is critical for reducing motor starting loads and preventing excessive heat generation. The DBW series is a staple in metallurgical machinery, mining equipment, and heavy-duty hydraulic power units (HPUs).

Featured models include: DBW20B-2-50B/315, DBW30A-1-50B/200, DBW30A-2-50B/200, and DBW30A-1-50B/315.

Key Technical Advantages:

• Efficient Solenoid Unloading: Facilitates zero-pressure unloading during machine idle times via the integrated solenoid, leading to significant energy savings.

• Stable High-Pressure Regulation: The two-stage spool design ensures smooth pressure adjustment and minimal pressure override even at peak flow rates, with ratings up to 31.5 MPa.

• Flexible Logic Configurations: Available in A-series (Single solenoid) and B-series (Specific reset/logic) to comply with diverse safety and operational circuit requirements.

• Ruggedized Design: The 50B design series is field-proven for superior contamination resistance and exceptional mechanical service life.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • DBW20B-2-50B/315: Size 20, B-logic, 50B series, max pressure setting 315 bar.

  • DBW30A-1-50B/200: Size 30, A-logic, max pressure setting 200 bar, designed for high-flow systems.

  • DBW30A-2-50B/200: Size 30, “2” configuration code, pressure setting 200 bar.

  • DBW30A-1-50B/315: Size 30, heavy-duty version, max pressure setting 315 bar.

• Core Technical Specs:

  • Nominal Size: NG20 (Size 20) / NG30 (Size 30).

  • Max Pressure: 200 bar (20 MPa) / 315 bar (31.5 MPa).

  • Flow Capacity: DBW20 (up to 500 L/min); DBW30 (up to 650 L/min).

  • Mounting Interface: Compliant with ISO 6264 (CETOP RP 121H).