CBEA-LHN Sun Hydraulics Pilot Check Valve 350 Bar 60L/min

Product Overview:

The CBEA-LHN (along with CBGA-LIN, CWGA-LIN, and PBHB-LAN) is a high-performance screw-in cartridge pilot-operated check and counterbalance valve engineered for critical load-holding, anti-cavitation, and dynamic motion control in high-pressure hydraulic circuits. Designed as a 100% direct drop-in replacement for Sun Hydraulics standard cavities (such as T-2A and T-17A), this series eliminates manifold redesign costs. Featuring hardened steel valve components, floating construction, and zero-leakage poppet geometry, every unit undergoes 100% factory simulated condition testing to deliver exceptional durability, high volumetric efficiency, and precision stability under severe working environments.

Technical Specifications

• Model Series: CBEA-LHN (Featured series includes CBGA-LIN, CWGA-LIN, PBHB-LAN)

• Cavity Compatibility: Sun Cavity T-2A (CBEA series), T-17A (CBGA / CWGA series)

• Nominal Flow Capacity: 60 L/min (15 gpm) for CBEA; up to 240 L/min (60 gpm) for CBGA

• Maximum Operating Pressure: 350 bar (5000 psi)

• Proof / Peak Pressure: 420 bar (6090 psi)

• Pilot Ratio: 3:1 (CBEA / CBGA standard), 2:1 (CWGA load-control model)

• Internal Leakage: Max 5 drops/min at 85% of standard pressure setting

• Adjustment Mechanism: Option L (Standard Screw Adjustment with Hex Socket)

• Seal Material: Option N (Buna-N Nitrile standard, Viton/FKM optional)

• Fluid Operating Temperature: -40°C to +120°C (-40°F to +250°F)

• Valve Unit Weight: Approx. 0.22 kg (T-2A) / 0.65 kg (T-17A)

Key Technical Advantages:

• Floating Construction Technology: Features Sun-style floating construction that prevents internal poppet binding caused by excessive installation torque or manifold hole machining tolerances.

• Micro-Finish Hardened Alloy Steel: Poppets and sleeves are precision heat-treated and ground to micro-inch tolerances, delivering unmatched wear resistance and zero internal drift under maximum pressure.

• 100% Factory Simulated Testing: Every individual valve is tested under full working pressure, flow, and hysteresis parameters on dynamic test benches prior to shipment.

• Direct Drop-in Interchangeability: Standardized dimensions, threads, and operational response fully match original Sun Hydraulics cartridges for seamless retrofit and maintenance.

Application Areas:

• Mobile Construction Machinery: Boom and stick cylinder locking circuits in excavators, load-holding systems in mobile cranes.

• Aerial Platforms & Elevating Work Equipment: Boom lift cylinder holding valves and emergency anti-drop security circuits.

• Industrial Hydraulic Power Units: Press clamping hold-pressure blocks, plastic injection molding clamping circuits, and gravity drop prevention manifolds.

• Agricultural & Mining Vehicles: Harvester header lift control, hydraulic outrigger stabilization systems for heavy drill rigs.

Expert Maintenance Tips:

• Fluid Cleanliness Protocol: Maintain system cleanliness to ISO 4406 standard 18/16/13 or better. Utilize absolute 10-micron filtration to prevent valve poppet contamination.

• Calibrated Torque Installation: Always use a calibrated torque wrench. Tighten T-2A cavity cartridges to 45–50 Nm (35–40 lbf·ft) and T-17A cavity cartridges to 200–215 Nm (150–160 lbf·ft).

• O-Ring Seal Protection: Inspect manifold cavity entrance chamfers for burrs before insertion. Pre-lubricate all external O-rings and backup rings with clean hydraulic oil to avoid seal damage during installation.