DBW20 Solenoid Relief Valve | DBW20B-1 | DBW20B-2 | 315 Bar 200 Bar | Pilot Operated Unloading Valve

DBW20 Series Pilot-Operated Solenoid Relief Valves

Product Overview: The DBW20 series is a high-performance pilot-operated relief valve integrated with a solenoid directional valve, specifically engineered for Size 20 high-flow hydraulic systems. This series functions not only as a primary safety valve to limit peak pressure but also enables automated system unloading via the top-mounted solenoid. By activating the solenoid, the system can circulate oil back to the tank at minimum pressure without disturbing the main pressure setting. This is critical for reducing motor start-up torque, minimizing heat generation, and extending pump service life.

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

Key Technical Advantages:

• Two-Stage Pressure Control: The two-stage spool architecture ensures minimal pressure override and exceptional linearity even during high-flow transitions (up to 500 L/min).

• Solenoid Remote Unloading: Available in B1 (Normally Open unloading) and B2 (Normally Closed unloading) logic variants to comply with diverse safety and operational circuit requirements.

• High-Pressure Resilience: Rated pressure capacities ranging from 200 bar to 315 bar, covering the full spectrum from medium-duty to heavy-duty high-pressure applications.

• 50B Industrial Design: The field-proven 50B series offers superior vibration resistance and long-term seal integrity for continuous operation in harsh environments.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • DBW20B-1-50B/315: Size 20, B1 Logic (Normally Open), 50B series, max pressure setting 315 bar.

  • DBW20B-2-50B/315: Size 20, B2 Logic (Normally Closed), 50B series, max pressure setting 315 bar.

  • DBW20B-1-50B/200: Size 20, B1 Logic, suitable for medium-pressure systems up to 200 bar.

  • DBW20B-2-50B/200: Size 20, B2 Logic, suitable for systems up to 200 bar.

• Core Technical Specs:

  • Nominal Size: NG20 / Size 20.

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

  • Flow Capacity: Up to 500 L/min.

  • Mounting Interface: Compliant with ISO 6264 (Subplate mounting).