CDB2-F15 Two-Link Hydraulic Multi-Way Valve for 1-3 Ton Forklifts

The CDB2-F15 is a two-link monoblock multi-way hydraulic control valve designed as the mast control valve for 1-3 ton electric and internal combustion counterbalance forklifts, including HELI CPCD10-CPCD30, Hangcha CPCD10-CPCD30, and Lonking LG10-LG30DT series. This valve provides independent directional control of two hydraulic functions — typically the mast lift/lower circuit and the mast tilt forward/backward circuit — through two dedicated spool sections integrated into a single cast iron monoblock body. The compact two-link design is optimized for the space constraints and lower hydraulic flow requirements of 1-3 ton class forklifts, typically operating with gear pump flow rates of 20-40 L/min compared to the 60-100 L/min flow rates required by 5-10 ton class valves. By distributing pressurized hydraulic oil from the main pump to the lift and tilt cylinders through precision-machined internal galleries, this valve enables the operator to control all mast movements through the factory control levers with smooth, proportional response.

The valve body is cast from high-grade gray iron and CNC-machined to achieve parallel honed spool bores with a surface finish of Ra 0.4μm or better, providing the foundation for low-friction spool actuation and minimal internal bypass leakage. Each spool is manufactured from hardened and ground 20CrMnTi alloy steel with case-hardened working surfaces to 58-62 HRC, operating with a diametral clearance of 8-15 microns in the honed bore. Both spool sections include integrated load check valves that trap pressurized oil in the cylinder circuits during directional transitions, preventing the mast or forks from drifting downward or tilting unexpectedly when the operator shifts the control lever. An adjustable main pressure relief valve — a direct-acting poppet design — provides system over-pressure protection and is factory-set to the rated pressure of the forklift hydraulic system, typically 160-200 bar for 1-3 ton class trucks. The spools are spring-centered to neutral position, ensuring automatic return to the hold position when the operator releases the control lever.

The CDB2-F15 employs an open-center hydraulic circuit configuration where pump flow passes through the valve gallery and returns to the hydraulic tank at low back pressure when both spools are in neutral. This design characteristic minimizes parasitic hydraulic pump load during idle periods, reducing both energy consumption on electric forklifts and heat generation in the hydraulic oil — an important consideration for electric forklifts where battery runtime between charges is a critical productivity metric. Direct bolt-on replacement for 1-3 ton HELI CPCD10-CPCD30, Hangcha CPCD10-CPCD30, Lonking LG10-LG30DT, and equivalent domestic forklifts using CDB2-F15 series control valves. Verify port thread sizes (typically metric M14-M22), spool function assignments matching your control lever configuration, and mounting bolt center distance before installation. Replace the hydraulic return filter and flush the system with clean ISO VG 32 or 46 hydraulic oil during valve replacement. For compatible hydraulic hoses, quick-connect couplers, gear pumps, lift cylinders, and complete hydraulic system maintenance kits, visit our Forklift Engine Parts section. For hydraulic system design references, consult Bosch Rexroth industrial hydraulics documentation.

Technical Specifications

• PN: CDB2-F15
• Type: Two-Link Monoblock Multi-Way Directional Control Valve
• Capacity: 1.0 – 3.0 Ton Forklift
• Flow Rate: 20-40 L/min (Typical)
• Body: Gray Cast Iron, CNC-Machined, Honed Bores
• Spools: 20CrMnTi Hardened Steel, 58-62 HRC
• Relief Valve: Adjustable Direct-Acting Poppet, 160-200 bar
• Circuit: Open-Center with Load Checks
• Oil: ISO VG 32/46 Hydraulic Oil

Compatible Forklift Models

Each CDB2-F15 valve is subjected to a full pre-shipment test protocol: spool stroke and return force verification on both sections, relief valve crack pressure setting confirmation, internal leakage measurement at 150 bar for 3 minutes per spool, and cycle testing with hydraulic oil at 50°C to verify consistent spool actuation force across the operating temperature range. The valve is shipped with all ports capped, wrapped in VCI anti-corrosion paper, and packed in a foam-lined reinforced carton. 12-month warranty against manufacturing defects. Installation tip: after connecting all hydraulic lines, cycle each mast function through full travel 5-10 times at low engine/pump RPM to purge any trapped air before applying full rated load. For fleet hydraulic system service programs or technical assistance with valve identification and cross-referencing, contact our technical support team with your forklift model and a photo of your existing valve.