34BY-H6B-T Solenoid Directional Valve 315bar

Product Overview:

The 34BY-H6B-T series (including functional variants 34BN-H6B-T, 34BK-H6B-T, and 34BM-H6B-T) is a direct-acting, 3-position 4-way hydraulic solenoid directional control valve engineered strictly to ISO 4401-03 (NG6 / CETOP 03) mounting standards. Designed as a reliable, high-performance OEM replacement valve, it guarantees 100% direct drop-in interchangeability with standard hydraulic directional valves, requiring zero subplate modifications or piping rework. Cast from high-density ductile iron and integrated with micron-honed spools, the valve handles operational pressures up to 31.5 MPa (315 bar) with minimal internal leakage and crisp dynamic response. Every valve undergoes 100% simulated full-load condition testing before leaving the factory to ensure uncompromised durability in heavy-duty hydraulic circuits.

Technical Specifications:

• Model Codes: 34BY-H6B-T, 34BN-H6B-T, 34BK-H6B-T, 34BM-H6B-T

• Mounting Interface: ISO 4401-03-02-0-05 / CETOP 03 (NG6)

• Rated Operating Pressure (Ports P, A, B): 31.5 MPa (315 bar / 4567 psi)

• Max Tank Pressure (Port T): 16 MPa (160 bar)

• Max Permissible Flow Rate: 63 L/min (16.6 gpm)

• Control Method: Direct-acting wet-pin solenoid operated

• Coil Voltage Options: 24V DC, 110V AC, 220V AC (terminal box or plug connector options)

• Fluid & Temp Range: Mineral-based hydraulic oil, -20°C to +70°C

• Net Weight: Approx. 2.2 kg (Double solenoid unit)

Key Technical Advantages:

• 100% Direct Drop-in Interchangeability: Mounting surface patterns, port centers, and bolt dimensions strictly align with ISO 4401-03 standards. Field replacements can be performed seamlessly, eliminating piping redesigns and minimizing equipment downtime.

• Ductile Iron Casting & Precision Honing: Cast from high-strength resin-sand ductile iron, the heavy-duty housing resists deformation under pressure shocks. Precision compound honing between the spool and housing bore ensures micron-level clearances, dramatically suppressing internal cross-port bypass at 31.5 MPa pressure.

• Durable Wet-Pin Solenoid Architecture: Features wet-pin solenoids where the moving armature operates submerged in system hydraulic fluid. This delivers continuous self-lubrication, efficient cooling, cushioned switching impacts, and long electrical coil service life.

• 100% Simulated Condition Factory Testing: We reject random sampling. Every single valve is validated on automated test benches under full rated pressure (31.5 MPa), maximum flow, and continuous switching cycles to eliminate early-life failure or spool binding before shipment.

Application Areas:

• CNC machine tools, cutting machinery, and automated clamping systems

• Plastic injection molding machinery and auxiliary hydraulic circuits

• Industrial Hydraulic Power Units (HPUs) and centralized pump stations

• Scrap metal balers, hydraulic briquetting presses, and mobile hydraulics

Expert Maintenance Tips:

• Verify Subplate Surface Flatness: Prior to mounting, check the mating subplate surface flatness. Ensure it is within 0.01/100 mm with a surface finish better than Ra 0.8. Uneven surfaces cause mechanical stresses that bind the internal spool when bolts are torqued.

• Enforce Strict Cleanliness Standards: Solid particle contamination is the primary cause of spool scoring and stickiness. Maintain hydraulic fluid cleanliness to ISO 4406 class 20/18/15 or cleaner using high-efficiency return and pressure line filters.