YUKEN HG & HCG Pressure Control Valve | HG-03-C3-22 | HCG-06-C2 | Hydraulic Relief & Sequence Valve

HG & HCG Series Multi-Functional Pressure Control Valves

Product Overview:

The HG and HCG Series are highly versatile pressure control components within hydraulic systems. By altering the internal pilot drain configuration, a single valve can function as a Sequence Valve, Unloading Valve, Low-Pressure Relief Valve, or Back Pressure Valve. The HCG Series further integrates a check valve to allow for free reverse flow. Specifically engineered for medium-to-low pressure applications and built on the reliable 22 Design Series, these valves are extensively used in automated machine tools, industrial presses, and auxiliary circuits of hydraulic power units.

Featured models on this page: HG-03-C3-22, HCG-06-C2, and the complete range covering pressure grades A/B/C/H and function codes 1/2/3/4.

Key Technical Advantages:

• 4-in-1 Versatility: A single body can be reconfigured between sequence and relief functions by adjusting the cover plate or drain ports, significantly reducing inventory complexity.

• Precise Graduated Regulation: Available in A, B, C, and H pressure adjustment ranges, ensuring excellent linearity and stability across various stages up to $210\text{ Bar}$.

• Integrated Check Valve (HCG Only): The HCG variant includes a high-performance check valve, simplifying circuit design for actuators requiring free reverse flow.

• Low Hysteresis & Durability: Precision-ground and hardened spools ensure sensitive response and minimal internal leakage even under high-frequency operation.

Detailed Specifications & Parameters:

• Core Model Matrix:

  • HG-03 / HCG-03: 3/8″ size, Max flow approx. $50 – 125\text{ L/min}$.

  • HG-06 / HCG-06: 3/4″ size, Max flow approx. $125 – 250\text{ L/min}$.

• Pressure Adjustment Codes:

  • A: $0.7 – 7\text{ Bar}$ (Ultra-low pressure)

  • B: $3.5 – 35\text{ Bar}$ (Low pressure)

  • C: $17.5 – 70\text{ Bar}$ (Medium pressure)

  • H: $35 – 210\text{ Bar}$ (High pressure)

• Function Type Codes:

  • 1/2/3/4: Corresponding to different internal/external pilot and drain configurations.

• Core Technical Specs:

  • Max Operating Pressure: $210\text{ Bar (3000 PSI)}$.

  • Design Series: 22 Series.

  • Mounting Type: Sub-plate mounting.