YFB Series Relief Valve | YFB10H4 | YFB20H4 | YFB32H4 | Plate Pressure Regulating Valve

YFB Series Plate-Mounted Pressure Relief Valves

Product Overview:

The YFB Series is a high-performance, plate-mounted pilot-operated relief valve engineered for pressure regulation, safety protection, and remote pressure control in hydraulic systems. Serving as the “sentinel” of system pressure, the YFB series ensures stable bypassing at preset levels to prevent system overloading. With its H4 high-pressure rating, this series is extensively utilized in metal shears, injection molding machines, hydraulic balers, and large-scale hydraulic power units (HPUs). Its subplate mounting configuration follows standard installation interfaces, simplifying plumbing and significantly reducing potential leak points.

Featured models include: YFB10H4, YFB20H4, YFB32H4, and the YFB10-H4 variant.

Key Technical Advantages:

• Superior Regulation Accuracy: The pilot-operated architecture maintains a minimal pressure differential even during high-flow bypass, ensuring consistent system pressure.

• H4 High-Pressure Capacity: Specifically designed for heavy-duty cycles; the valve body is constructed from high-strength materials to operate reliably up to 315 Bar (31.5 MPa).

• Low Noise & Anti-Vibration: Optimized internal damping effectively suppresses hydraulic shocks and high-frequency squealing during the relief process.

• Flexible Adjustment Options: Features a standard manual adjustment knob and includes a Remote Control Port for multi-stage pressure regulation or unloading functions.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • YFB10H4 / YFB10-H4: Size NG10 (3/8″), ideal for precision pressure control in low-to-medium flow systems.

  • YFB20H4: Size NG20 (3/4″), the universal high-flow relief valve most common in industrial applications.

  • YFB32H4: Size NG32 (1-1/4″), a heavy-duty pressure control valve for ultra-high-flow hydraulic circuits.

• Core Technical Specs:

  • Pressure Rating: Grade H, max operating pressure up to 315 Bar (31.5 MPa).

  • Flow Capacity: Supports from $100\text{ L/min}$ to over $400\text{ L/min}$ depending on the nominal size.

  • Adjustment Range: Typically covers $7 – 31.5\text{ MPa}$.

  • Mounting Type: Standard subplate mounting (compliant with ISO 6264).