SUN Cartridge Valve | DCFD-XCN | PBJB-LAN | CKEB-XCN | Balancing & Relief Valves

High-Performance Cartridge Balancing & Pressure Relief Valves

Product Overview:

This series of Threaded Cartridge Valves includes Counterbalance, Pressure Reducing, and Pilot-Operated Relief valves, serving as the core for load control and overpressure protection. The DCFD and DCEC series are designed specifically to prevent actuators like hydraulic cylinders from runaway under overrunning load conditions. Meanwhile, the PBJB reducing valves ensure precise downstream circuit pressure. Manufactured from high-hardness alloy steel, these valves offer rapid response and ultra-low internal leakage, making them ideal for integration into hydraulic manifolds for construction machinery.

Featured models include: DCFD-XCN, DCFC-XYN, DCEC-XTN, DCED-XCN, PBJB-LAN, and CKEB-XCN.

Key Technical Advantages:

• Superior Load Locking: Counterbalance valves (e.g., DCFD) feature exceptional sealing to ensure zero-drift cylinder positioning when stopped.

• Graduated Modulation: Multiple pilot ratio options provide smooth descending control, effectively eliminating system vibration and oscillation.

• Compact Cartridge Design: The threaded cartridge format saves manifold space and reduces overall system weight and plumbing complexity.

• Corrosion & Fatigue Resistance: Valve bodies are zinc-plated for rust resistance, with internally reinforced springs to maintain constant cracking pressure after millions of high-pressure cycles.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • DCFD-XCN / DCFC-XYN: Pilot-operated counterbalance valves for medium-to-high flow load control.

  • DCEC-XTN / DCED-XCN: High-precision balancing valves with external pilot options.

  • PBJB-LAN: Pilot-operated pressure reducing/relieving valve for stable branch pressure.

  • CKEB-XCN: Pilot-to-open check valve (Pilot-operated check valve).

• Core Technical Specs:

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

  • Flow Capacity: Covers $30\text{ L/min}$ to $480\text{ L/min}$ depending on cavity size (e.g., T-11A, T-2A).

  • Pilot Ratios: Available in 3:1, 4.5:1, 10:1 to suit different application requirements.

  • Seals: Standard Buna-N; Viton (FKM) available for high-temperature fluids.