SUN Hydraulics Relief Valve | RPEC-LCN | RPGC-LCN | RPKC-LCN | NFCD-LFN | Pilot-Operated

Pilot-Operated Balanced Piston Relief Valves (RPE / RPG / RPK / NFC)

Product Overview:

This series of Pilot-Operated Balanced Piston Relief Valves represents the pinnacle of pressure regulation and overload protection for hydraulic systems. Covering a full spectrum of sizes from standard to high-flow capacities—including RPEC, RPGC, RPIC, RPKC, and the specialized NFCD—these valves are engineered for excellence. Utilizing a pilot-operated structure, they offer an exceptionally low pressure rise near the setpoint, ensuring maximum system stability during high-load bypass and preventing excessive fluid heating.

Featured models include: RPEC-LCN, RPGC-LCN, RPIC-LCN, RPKC-LCN, and NFCD-LFN.

Key Technical Advantages:

• Superior Regulation Linearity: The balanced piston design significantly minimizes flow-induced pressure overrides, providing smooth and precise relief modulation.

• Full Flow Capacity Range: Available from T-10A up to T-19A cavities, supporting flow demands from 95 L/min to over 480 L/min.

• Rapid Response & Shock Suppression: Fast-acting pilot stages instantaneously absorb transient pressure spikes, safeguarding pumps and actuators.

• Exceptional Repeatability: Hardened internal spools and seats ensure setpoint accuracy remains intact over millions of high-pressure cycles.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • RPEC-LCN: Size T-10A, Max flow 95 L/min, Range C ($10 – 420\text{ Bar}$).

  • RPGC-LCN: Size T-3A, Max flow 200 L/min, the industrial benchmark for stability.

  • RPIC-LCN: Size T-17A, Max flow 380 L/min, designed for heavy-duty, high-volume circuits.

  • RPKC-LCN: Size T-19A, Max flow exceeding 480 L/min, the ultimate in flow handling.

  • NFCD-LFN: Balanced piston relief valve with Range L adjustment, fits T-10A cavity.

• Core Technical Specs:

  • Max Operating Pressure: Rated up to 350 Bar (5000 PSI).

  • Adjustment Type: L type (manual hex screw with locknut).

  • Seals: Buna-N (Standard); Viton (FKM) optional.

  • Cavity Specs: T-10A, T-3A, T-17A, T-19A.