Rexroth ZDB6 & Z2DB6 Relief Valve | ZDB6VP2 | ZDB6VA2 | Pilot-operated | NG6

Rexroth ZDB6 & Z2DB6 Sandwich Plate Pilot-operated Relief Valves

Product Overview: The Rexroth ZDB and Z2DB Series are high-performance pilot-operated pressure relief valves featuring a Sandwich Plate design. Compliant with ISO 4401-03 mounting standards, these valves can be directly stacked beneath directional valves, significantly simplifying system integration and reducing external piping. The ZDB6 offers single-circuit protection (for P, A, or B ports), while the Z2DB6 provides dual-circuit cross-over relief. The pilot-operated architecture ensures an extremely flat pressure-override curve even under high flow rates, making them the premier solution for pressure limitation in plastic machinery, machine tools, and industrial power units.

Featured models include the ZDB6VP1-4X/200, ZDB6VP2, ZDB6VA2-42, and the 50V series equipped with high-performance FKM seals.

Key Technical Advantages:

• Sandwich Plate Optimization: Modular design supports vertical stacking, eliminating leakage points and minimizing the footprint of hydraulic manifolds.

• Superior Pilot Stability: Unlike direct-operated types, the pilot-operated design ensures a small differential between cracking and full-flow pressure for ultra-stable system control.

• Versatile Circuit Configurations: Available in VP (P-port), VA (A-port), VB (B-port), and VC (A+B ports) versions to suit diverse hydraulic logic.

• Durable Sealing Options: Choice of standard NBR or V (FKM/Viton) seals for fire-resistant fluids and high-temperature environments.

Detailed Specifications & Parameters:

• Core Series: Rexroth ZDB6 / Z2DB6 (Size 6 / NG6).

• Featured Model Matrix:

  • ZDB6VP1-4X/200 (Design Series 4X, 200 Bar, P-port relief, with socket screw)

  • ZDB6VP2 (Standard P-port relief, with hand knob)

  • ZDB6VA2-42/50V (Series 50, FKM seals, A-port controlled)

  • Z2DB6-VP1/VA1 (Dual-circuit cross-over relief version)

• Core Technical Specs:

  • Mounting Interface: ISO 4401-03-02-0-05 (NG6 / Size 6).

  • Max Operating Pressure: Rated up to 315 Bar.

  • Max Flow Rate: Supports stable flow up to 60 L/min.

  • Adjustment Ranges: Available in 50, 100, 200, and 315 Bar spring ratings.