CXHA-XAN Sun Hydraulics Check Valve 80 gpm 350 bar

Product Overview

The CXHA-XAN and CXCD-XAN are Sun Hydraulics threaded cartridge check valves. The CXHA-XAN is a free-flow nose-to-side design using the T-16A cavity (Series 3), with a capacity of 80 gpm (approx. 320 L/min) and maximum operating pressure of 5000 psi (350 bar). These valves offer true interchangeability as drop-in replacements for original Sun cartridges without manifold modifications. Each unit undergoes precision manufacturing and rigorous testing, delivering extremely low leakage (≤1 drop/min) for reliable high-pressure hydraulic systems. Related models include CBDC, CWCA-LIN (counterbalance), MBGM-XIN and MBEM-XIN flow/load control valves.

Technical Specifications

• Model: CXHA-XAN / CXCD-XAN (Sun Hydraulics)
• Type: Free-flow check valve (nose-to-side / side-to-nose)
• Cavity: CXHA T-16A (Series 3); CXCD T-13A (Series 1)
• Capacity: CXHA 80 gpm (approx. 320 L/min); CXCD 15 gpm
• Maximum Operating Pressure: 5000 psi (350 bar)
• Cracking Pressure (typical): 4 psi (0.3 bar, XAN configuration)
• Maximum Valve Leakage: ≤1 drop/min at 24 cSt
• Seal Material: Buna-N (N code, standard)
• Installation Torque: CXHA 150–160 lbf·ft
• Weight: CXHA approx. 0.94 lb (0.43 kg)
• Hex Size: CXHA 1-1/4 in

Key Technical Advantages

1. Extremely low leakage design – Hardened and lapped sealing surfaces achieve leakage below 1 drop per minute for reliable system pressure holding.
2. Floating-style construction – Sun’s unique floating design minimizes the risk of internal binding caused by installation torque or cavity tolerances.
3. High-pressure capability – Ports 1 and 2 both accept 350 bar, suitable for demanding high-pressure hydraulic circuits.
4. True interchangeability and standard cavities – Fully compliant with Sun standard cavities, enabling direct replacement of original valves for easy maintenance.

Application Areas

Ideal for mobile equipment, agricultural machinery, injection molding machines, hydraulic power units, load-holding circuits, bypass protection, and any high-pressure hydraulic system requiring free-flow unidirectional control.

Expert Maintenance Tips

Install using the specified torque and avoid over-tightening; ensure cavity cleanliness and intact seals; Buna-N seals are for mineral oil—use EPDM for phosphate ester fluids; periodically check leakage and cracking pressure; after prolonged storage, verify free movement of the valve element.