Overview
The Sun Hydraulics CKCB-LCN EBA 0HU3-A2 is a pilot-to-open check valve cartridge designed for load-holding and load-check circuits in industrial hydraulic systems. This valve allows free flow from port 2 to port 1, blocking reverse flow while permitting controlled opening via pilot pressure at port 3. With a non-sealed pilot, steel seat, and non-vented design, it delivers reliable performance in machine tool controls, work-holding systems, and other applications requiring load-holding protection.
Key Features
- Pilot-to-open design with non-sealed pilot configuration
- Steel seat construction for durability and high-pressure capability
- Non-vented cartridge style for easy manifold integration
- Allows free flow from port 2 to load port 1
- Blocks reverse flow until pilot pressure opens valve from port 1 to port 2
- Effective pilot ratio scales with load pressure for proportional control
Technical Specifications
The CKCB-LCN series operates across a wide pressure range. At 30 psi (2 bar) load, approximately 55 psi (3.8 bar) pilot pressure is required, yielding a 0.5:1 effective pilot ratio. At 3000 psi (210 bar) load, approximately 1045 psi (72 bar) pilot pressure opens the valve, resulting in a 2.9:1 effective pilot ratio. The valve features dual-spring internal design—one spring closes the poppet, while a second returns the pilot piston with approximately 30–35 psi (2–2.5 bar) pilot pressure reserve.
Typical Applications
- Load-holding circuits in hydraulic presses and clamping systems
- Counter-balance valves and load-check manifolds
- Machine tool work-holding systems
- Hydraulic press brakes and metal-forming equipment
- Lift-table and stage-platform load protection
- Industrial automation and material-handling systems
Compatibility & Replacements
Compatible With
- Sun Hydraulics CKCB-LCN cartridge valve manifolds
- Standard SAE subplate configurations (EBA mounting style)
- Hydraulic systems operating between 30 psi and 3000 psi (2–210 bar)
- ISO 46, ISO 68, and ISO 100 hydraulic fluids
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The EBA 0HU3-A2 spool code is specific to this valve configuration and may not interchange with other CKCB variants without manifold modification.
Works With
- Sun Hydraulics SAE subplate manifold bodies
- Cartridge cavity manifolds (cavity specifications per Sun Hydraulics standards)
- Standard pilot and load hydraulic circuits operating to 3000 psi maximum
- Seal kits available from Sun Hydraulics and aftermarket suppliers for maintenance
