Forklift Multi-Circuit Hydraulic Directional Pressure Regulating Valve CDB2-F15

Forklift Multi-Circuit Hydraulic Valve CDB2-F15 — HELI / LONGGONG / BOALI Forklifts

The CDB2-F15 multi-circuit tandem hydraulic valve is a compact monoblock directional control valve that manages multiple hydraulic functions simultaneously on HELI, LONGGONG, and BOALI forklifts. Weighing 9 kg with overall dimensions of 161×38×78 mm, this valve combines directional flow control and pressure regulation in a single body — it directs hydraulic oil to the mast lift, tilt, and auxiliary attachment circuits while providing built-in pressure relief protection with a maximum operating pressure of up to 700 bar depending on circuit configuration. The CDB2-F15 uses a 1/4-inch port connection and supports a maximum flow rate of 100 L/min (26.42 gpm), making it suitable for 2-5 ton capacity forklifts in material handling applications.

This multi-function tandem valve serves as the central hydraulic control hub for the forklift’s working hydraulics — each spool section controls one function independently with spring-centered return to neutral. The valve supports HELI, LONGGONG, and BOALI brand forklifts across multiple capacity classes where the CDB2-F15 valve is the OEM-specified control unit. Common failure modes include: external oil leaks between spool sections (failed inter-section O-rings or gaskets); hydraulic function drift — mast slowly lowers or tilt angle changes without operator input (internal spool-to-bore leakage from wear); jerky or erratic hydraulic operation (contaminated hydraulic fluid causing spool binding); and complete loss of one hydraulic function (broken spool return spring or seized spool in its bore). The valve body’s compact 161mm length makes it suitable for forklifts with limited under-floor or mast mounting space.

Installation requires labeling and disconnecting all hydraulic lines at the valve ports, unbolting the valve from its mounting bracket, and replacing with new O-ring seals at every port connection. The control lever linkages must be adjusted after installation to achieve full spool travel in both directions. Bleed the hydraulic system by cycling each function through its full stroke several times with the engine running at idle speed. For related hydraulic system components, browse our Forklift Hydraulic Transmission Parts catalog.

Technical Specifications

Compatible Forklift Brands

Each valve is pressure-tested on all circuits before packaging. Standard air freight delivery to major ports worldwide. For compatibility verification or bulk orders, contact our team with your forklift model and hydraulic system specifications.