SUN Hydraulics Relief Valve | RSFC-LNN | RSFS-LNN | RSFC-LEN | Cartridge Pressure Control

RSFC & RSFS Series Direct-Acting Balanced Piston Relief Valves

Product Overview:

The RSFC and RSFS series are industrial-grade, direct-acting, balanced piston relief valves designed for integration into compact hydraulic Manifold Blocks. These valves feature an exceptionally low pressure rise profile near their setpoint, making them ideal for precise pressure regulation and overload protection. Whether it is the standard RSFC-LNN or the high-pressure RSFC-LEN, these cartridges provide superior repeatability and durability, safeguarding hydraulic actuators from catastrophic transient pressure spikes.

Featured models on this page: RSFC-LNN, RSFS-LNN, RSFC-LEN, and RSFCLEN.

Key Technical Advantages:

• Balanced Piston Architecture: Minimizes the effect of flow variations on the cracking pressure, ensuring stable performance across the entire flow range.

• Ultra-Low Leakage: Precision-ground spools and seats offer excellent sealing integrity when the system pressure is below the set value.

• Rapid Response Time: The direct-acting design ensures instantaneous reaction to pressure spikes, acting as a critical safeguard for sensitive pump groups.

• Compact Manifold Integration: Fits standard T-10A cavities, allowing for direct installation into manifold blocks to minimize the overall system footprint.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • RSFC-LNN: Direct-acting relief valve, L-style adjustment, Range N ($10 – 55$ Bar), T-10A cavity.

  • RSFC-LEN: Direct-acting relief valve, L-style adjustment, Range E ($25 – 400$ Bar) for high-pressure applications.

  • RSFS-LNN: Variant with specific damping characteristics to enhance stability in high-cycle systems.

• Core Technical Specs:

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

  • Max Flow Capacity: Approx. 95 L/min (25 GPM).

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

  • Seals: Standard Buna-N (N); Viton (FKM) optional for high-temp environments.