Sun Hydraulics Cartridge Valve | PRDB-LEN RPEC-LAN RDDA-LAN NFDD-LGN | Pressure & Flow Control

Sun Hydraulics PRDB, RPEC, RDDA & NFDD Series Cartridge Valves

Product Overview: Sun Hydraulics Cartridge Valves are globally recognized for their iconic “Floating Style” design. This unique construction allows internal components to self-center during installation, neutralizing stresses caused by manifold machining tolerances or excessive torque. This ensures the spool remains sensitive and responsive even under high-pressure conditions up to 350 Bar. This category features premier models for pressure and flow management: PRDB-LEN (Reducing/Relieving), RPEC-LAN/LCN (Pilot-operated Relief), RDDA-LAN (Direct-acting Relief), and NFDD-LGN (Pressure Compensated Throttle).

Engineered for high-pressure, long-life, and severe-duty hydraulic integrated circuits, these screw-in cartridges are the premier choice for construction machinery, CNC machine tools, crane load-holding circuits, and industrial Hydraulic Power Units (HPU).

Key Technical Advantages:

• Patented Floating Technology: The unique two-piece floating construction significantly enhances operational reliability under high-pressure cycles and minimizes internal leakage risks caused by mechanical stress.

• Precision Pressure Management: The RPEC and PRDB series provide exceptional pressure regulation linearity, effectively absorbing system spikes to protect downstream components.

• Constant Flow Compensation: The NFDD-LGN features superior pressure compensation to maintain constant actuator speeds despite varying load pressures.

• Sealing Integrity: Components like CSAB-XXN and XEOA-XXN offer high-grade sealing, ideal for circuit locking and directional control applications.

Detailed Specifications & Parameters:

• Core Series: Sun Hydraulics Pressure & Flow Management Cartridges.

• Featured Model Matrix: PRDB-LEN, RPEC-LCN, RPEC-LAN, RDDA-LAN, NFDD-LGN, CSAB-XXN, XEOA-XXN.

• Core Performance Specs:

  • Max Operating Pressure: Rated for heavy-duty operations up to 350 Bar (5,000 PSI).

  • Functional Logic: Reducing/Relieving (PRDB), Pilot Relief (RPEC), Direct Relief (RDDA), Pressure Compensated Flow Control (NFDD), Check/Shuttle (CSAB/XEOA).

  • Adjustment Options: L (Leak-proof screw), C (Cap-protected), X (Non-adjustable/Fixed).

  • Sealing Materials: N (Buna-N Standard) or V (Viton options).

  • Cavity Standards: Industry-standard cavities such as T-11A, T-10A, T-2A, T-13A, and T-163A.