SUN Counterbalance Valve | CBCA-LHN | CBEA-LHN | CBGA-LHN | CVGV-XCN | 3-Port Hydraulic Valve

3-Port Hydraulic Counterbalance & Pilot-to-Open Check Valves

Product Overview:

This series of Threaded Cartridge Counterbalance Valves and Pilot-to-Open Check Valves serves as the critical control element for load holding and motion control of hydraulic actuators (cylinders and motors). The CBCA/CBEA series counterbalance valves use internal pilot modulation to ensure smooth, chatter-free descent of overrunning loads. Complementary to this, the CVGV/CVCV pilot-operated check valves enable controlled reverse flow and guarantee zero-leakage static locking. Featuring a compact 3-port design compatible with standard SUN cavities, these valves are ideal for crane outriggers, mobile machinery, and heavy-duty lift circuits.

Featured models include: CBCA-LHN, CBEA-LHN, CBGA-LHN, CBIA-LHN, CKIV-XCN, CVCV-XCN, CVEV-XCN, CVGV-XCN, and CVIV-XCN.

Key Technical Advantages:

• Precision Load Modulation: Counterbalance valves offer various pilot ratios (e.g., 3:1) to effectively eliminate cavitation caused by overrunning loads, providing superior metering control.

• Zero-Leakage Static Locking: Pilot-to-open check valves feature precision-hardened and ground spools to ensure no load drift, even under high back-pressure.

• Multi-Size Flow Capacity: Spans from T-11A (CBCA) to T-17A (CBIA) cavities, supporting flow rates from 60 L/min up to 240 L/min.

• High-Reliability Cartridge Design: Built to industrial durability standards with all-steel internals, ensuring long maintenance cycles in harsh environments.

Detailed Specifications & Parameters:

• Counterbalance Model Matrix:

  • CBCA-LHN / CBEA-LHN: T-11A cavity, 3:1 pilot ratio, Range H ($70 – 280\text{ Bar}$), 3-port design.

  • CBGA-LHN / CBIA-LHN: High-flow counterbalance valves for heavy-duty industrial loads (T-2A & T-17A cavities).

• Pilot Check Model Matrix:

  • CVCV-XCN / CVGV-XCN / CVIV-XCN: Pilot-to-open check valves with exceptional sealing integrity.

  • CKIV-XCN / CVEV-XCN: Specialized variants for smooth opening and stable decompression.

• Core Technical Specs:

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

  • Flow Capacity: Ranges from $60\text{ L/min}$ to $240\text{ L/min}$ depending on the size.

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

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