24BI 24BO Series Hydraulic Electromagnetic Directional Valve | 24BI1-H6B-T-LH 24BO-H6B-T-LH

Genlu Hydraulic proudly introduces our 24BI / 24BO Series industrial-grade high-pressure electromagnetic directional control valves. Specifically engineered for precise fluid routing in medium-to-high pressure hydraulic circuits, this series delivers a precision-manufactured, drop-in replacement for mainstream standard directional valve architectures. We specialize in cross-referencing and supplying heavy-duty model codes, including 24BI1-H6B-T-LH, 24BI2-H6B-T-LH, 24BI3-H6B-T-LH, and 24BO-H6B-T-LH.

Serving as a fundamental flow control component in automated manufacturing and versatile hydraulic power units (HPUs), Genlu’s 24BI/24BO series conforms strictly to standard industrial geometries. We guarantee 100% Drop-in Interchangeability across standard subplate mounting dimensions, electrical connection styles, spool shifting response frequencies, and delta-P (pressure drop) performance curves. Every single valve is subjected to 100% full-pressure shift-response and internal leakage verification on our digital test benches, ensuring zero-drift and jam-free operation under rigorous continuous duty cycles.

Technical Specifications 

• Product Series: 24BI / 24BO Series Solenoid Operated Directional Control Valve (Size 6mm / NG6 / CETOP 03)

• Specific Model Codes: 24BI1-H6B-T-LH, 24BI2-H6B-T-LH, 24BI3-H6B-T-LH, 24BO-H6B-T-LH

• Nominal Size (Size): 6 mm

• Max Operating Pressure (Ports P/A/B): 31.5 MPa (315 bar)

• Max Flow Capability: Up to 60 L/min (Depending on spool profile and circuit pressure configuration)

• Electrical & Control Setup: Standard industrial voltage coils paired with premium LED terminal junction boxes (designated by the “LH” suffix)

• Construction Type: Wet-pin solenoid operated, sliding spool configuration

• Mounting Pattern: Standard manifold/subplate mounting

Key Technical Advantages:

• Heavy-Duty Wet-Pin Solenoid Design: Features an advanced wet-pin armature configuration where the moving cores operate completely submersed in the hydraulic oil. This eliminates dynamic shaft seals (preventing external leakage), minimizes friction, and leverages oil viscosity to cushion shifting shock, resulting in quieter operation.

• Flow-Optimized Internal Castings: The internal flow paths are computationally optimized via fluid-dynamic (CFD) simulations to maximize cross-sectional area. This significantly restricts fluid resistance, ensuring ultra-low pressure drop even at a full 60 L/min flow rate, which drastically limits system heat generation.

• Micro-Tolerance Spool-to-Bore Fitting: The core sliding spool is machined from premium alloy steel, induction hardened, and finished on high-precision centerless grinders. The resulting micron-level clearance inside the valve bore guarantees minimal cross-port leakage under a full 31.5 MPa holding load, securing excellent volumetric efficiency.

• Elite Anti-Sticking & Fail-Safe Shifting: Equipped with high-tensile return springs tested through millions of operational cycles. Combined with specialized annular balancing grooves machined onto the spool lands, the valve effectively counteracts static hydraulic locking forces, ensuring a millisecond-level fail-safe mechanical return upon de-energization.

Application Areas:

• Machine Tools & Automation Lines: Workpiece clamping, indexing, and table feed circuits for CNC milling, turning, and multi-station transfer machines.

• Primary Metallurgy: Main manifold control blocks for steel mill automated conveyors, auxiliary hydraulic stations, and industrial charging rigs.

• Light Industrial Machinery: Plastic blow molding machinery, compact hydraulic balers, shoemaking machines, and standardized compact hydraulic power units (HPUs).

Expert Maintenance Tips:

• Manage Port T Back-Pressure: Although wet-pin solenoids are highly resilient, excessive static back-pressure or erratic pressure spikes on Port T can degrade the net magnetic shifting force, preventing full spool travel. Ensure the tank line is routed smoothly and unrestricted back to the reservoir.

• Junction Box Ingress Protection: The “LH” designation identifies an upgraded, robust junction box arrangement. When installing or servicing in environments exposed to water-based cutting coolants or heavy moisture, ensure the junction cover screws are completely tightened and the electric cable strain relief boot is sealed tight to prevent coil short-circuits.

• Enforce Fluid Cleanliness Standards: The tight sliding tolerances inside a 6mm valve core demand strict contamination management. Maintain oil cleanliness at ISO 4406 20/18/15 or better. If a solenoid is energized but the valve fails to route fluid, check immediately for fine particulate or sliver jamming at the spool landing edges.