Product Overview
The 34BM-H10B-T and 34EM-H10B-T are wet-type solenoid directional control valves designed to YUKEN mounting standards, corresponding to NG10 size. They belong to the three-position, four-way solenoid directional valve product line. These solenoid directional valves are control valves in which the solenoid directly actuates the spool to switch direction, primarily used for start, stop, and directional control of hydraulic actuators, and can also serve as pilot valves for high-power hydraulic valves.
In the model code, “B” indicates a wet-type AC solenoid (AC), and “E” indicates a wet-type DC solenoid (DC). Both are three-position, four-way, spring-centered configurations. The 34BM-H10B-T uses a wet-type AC solenoid (AC220V), while the 34EM-H10B-T uses a wet-type DC solenoid (DC24V), accommodating different control system power supply requirements.
The wet-type solenoid integrates the armature and push rod into a single unit, with pressure oil introduced between the yoke and armature. This eliminates the intermediate dynamic seal, fundamentally solving oil leakage issues while avoiding coil overheating, shock, vibration, and noise caused by seal damage or excessive oil temperature rise. Because solenoid holding force is increased, matched return spring stiffness is greater, enabling more reliable switching and extended service life.
The mounting dimensions of this series fully conform to YUKEN standards, with valve dimensions and mounting holes meeting ISO 4401 international standards. They are directly interchangeable with YUKEN and Rexroth valves of the same size without requiring manifold modification.
The 24BI1-H10B-T is a two-position, four-way (single solenoid) variant within the same series, also featuring wet-type solenoid construction and subplate mounting, suitable for hydraulic systems requiring single-direction control or spring return. It has a maximum pressure rating of 31.5MPa (315 bar), with standard coil options of DC24V/AC220V, precision-lapped spool, low internal leakage, and quiet operation.
Every unit undergoes 100% simulation-based testing prior to shipment, covering switching reliability, internal leakage, and pressure holding performance. As drop-in replacements, these valves are fully compatible with the OEM YUKEN specification in mounting dimensions, port locations, and performance characteristics.
Technical Specifications
All parameters below are based on verified supplier technical pages and industry-standard specifications:
34BM-H10B-T / 34EM-H10B-T Technical Specifications:
Complete Model: 34BM-H10B-T (AC) / 34EM-H10B-T (DC)
Product Series: 34 Series solenoid directional valve (joint design type)
Brand Compatibility: YUKEN DSG series interchangeable
Spool Function: Three-position, four-way solenoid directional valve
Spool Function Code: M type (center O-type, P/A/B/T all closed)
Nominal Size: NG10 (10 mm)
Mounting: Subplate mounting (B = subplate connection)
Rated Pressure: 31.5 MPa (315 bar)
Nominal Flow: 40 L/min
Permissible Back Pressure: < 6.3 MPa
Solenoid Type: Wet-type solenoid (B = wet-type AC / E = wet-type DC)
Supply Voltage: AC 220V (34BM) / DC 24V (34EM)
Permissible Voltage Variation: ±10%
Switching Frequency: Wet-type solenoid 60 cycles/min
Maximum Switching Frequency: Wet-type solenoid 120 cycles/min
Media Temperature Range: Mineral oil -20°C to +70°C; water-containing fluid +10°C to +54°C
Viscosity Range: 10 – 350 mm²/s
Oil Filtration Precision: ≤ 30 μm
Operating Temperature Range: -20°C to +80°C
Hydraulic Fluid: Mineral oil, water-containing fluid
Connection Type: Subplate connection
Material: Cast Iron
24BI1-H10B-T Technical Specifications:
Complete Model: 24BI1-H10B-T
Spool Function: Two-position, four-way solenoid directional valve (single solenoid, spring return)
Spool Function Code: I1 type
Nominal Size: NG10 (10 mm)
Rated Pressure: 31.5 MPa (315 bar)
Solenoid Type: Wet-type solenoid (E = wet-type DC / B = wet-type AC)
Supply Voltage: DC 24V / AC 220V
Remaining parameters consistent with 34BM-H10B-T general specifications
Note: Specifications are based on verified supplier technical pages (Wuxi Xinli Hydraulic, Oukairui Fluid Technology, Shanghai Zhumao Valve, etc.). Model code breakdown: 34 = three-position, four-way / 24 = two-position, four-way; B = wet-type AC solenoid (AC) / E = wet-type DC solenoid (DC); M = spool function code; H = nominal pressure 31.5 MPa; 10 = nominal size NG10; B = subplate connection; T = spring return and centering. This series is manufactured by multiple manufacturers; specific parameters may vary slightly. Always verify against the actual supplier’s technical documentation during selection.
Key Technical Advantages
1. Wet-Type Solenoid Construction for Significantly Extended Service Life
The series employs a wet-type solenoid design that integrates the armature and push rod into a single unit, with pressure oil introduced between the yoke and armature, eliminating the intermediate dynamic seal of conventional dry-type valves. This design fundamentally solves oil leakage issues while avoiding coil overheating, shock, vibration, and noise caused by seal damage or excessive oil temperature rise. The oil-immersed solenoid design provides cushioning, reduces noise, eliminates friction between spool and oil seal, and effectively extends service life.
2. YUKEN Standard Mounting Dimensions for Drop-In Interchangeability
The mounting dimensions of this series fully conform to YUKEN standards, with valve dimensions and mounting holes meeting ISO 4401 international standards. Port locations and mounting bolt hole spacing are identical to the YUKEN DSG series. No manifold modification or remachining of the mounting surface is required for replacement — direct drop-in interchangeability is achieved. The products are widely used in injection molding machines, machine tools, construction machinery, coal mining hydraulic equipment, and hydraulic presses, with cost-effectiveness superior to Japanese original manufacturers.
3. High Pressure Rating with Compact Subplate Design
The rated pressure reaches 31.5 MPa (315 bar), satisfying medium-to-high pressure hydraulic system control requirements. The subplate mounting design enables direct installation of the valve body onto integrated manifolds, eliminating additional piping connections, reducing leakage points and installation space requirements, and facilitating system integration and maintenance. Permissible back pressure reaches 6.3 MPa, enabling reliable operation in systems with return line back pressure.
4. Precision-Lapped Spool with Low Internal Leakage
The spool is manufactured through precision lapping processes, with clearance tolerances held to strict specifications, achieving low internal leakage and quiet operation. The precision fit between spool and sleeve ensures accuracy and repeatability of switching action. The spool, coil, and iron pipe of the same specification are replaceable, facilitating easy installation, improving energy efficiency, and reducing costs.
5. 100% Simulation-Based Testing and Drop-In Interchangeability
Every valve undergoes 100% simulation-based testing prior to shipment. Test protocols cover switching reliability, internal leakage measurement, pressure holding performance, and solenoid holding force verification. The valve is fully compatible with the OEM YUKEN specification in mounting dimensions, port locations, and performance characteristics, enabling direct replacement without hydraulic circuit modification.
Application Areas
Injection Molding Machines: Directional control of mold clamping, injection, holding, and mold opening actions
Shearing and Bending Machines: Directional control of blade lifting and bending actions
Machine Tool Hydraulic Systems: Worktable feed, fixture clamping, and tool changer action control
Construction Machinery: Hydraulic pilot control circuits for excavators and loaders
Coal Mining Hydraulic Equipment: Hydraulic directional control for supports, drilling rigs, and related equipment
Hydraulic Pump Stations: Sequential action and direction switching control for multiple actuators
Hydraulic Presses: Directional control of press head lifting and pressing actions
Expert Maintenance Tips
Pre-Installation Checks:
Verify manifold mounting surface is clean and free of burrs; inspect O-ring seals for damage
Flush all piping with clean hydraulic fluid prior to installation; ensure system cleanliness reaches ISO 4406 18/15 or better
Confirm solenoid voltage specification (AC 220V or DC 24V) matches the control system
Tighten mounting bolts in diagonal sequence to specified torque to prevent valve body distortion and spool binding
Operational Maintenance:
Use a 10 μm or finer pressure filter, specified without bypass and equipped with a contamination indicator
Recommended fluid: mineral oil-based anti-wear hydraulic oil; maintain operating viscosity within 10 – 350 mm²/s
Maintain media temperature within -20°C to +70°C (water-containing fluid +10°C to +54°C); avoid overheating
Periodically verify solenoid coil resistance is within rated range; check terminals for oxidation or looseness
System return back pressure must not exceed 6.3 MPa to avoid spool switching difficulty
Wet-type solenoids are rated for continuous duty; no intermittent cooling required, but ensure ambient temperature does not exceed +80°C
NG10 valves have two T ports; either may be used, but the T port must be connected to the return line
Troubleshooting Guide:
Spool fails to actuate or switches abnormally: Check solenoid supply voltage (AC 220V / DC 24V, ±10% permissible variation), measure coil resistance, verify control signal reaches the valve correctly
Increased internal leakage: Check system cleanliness level; inspect spool/sleeve for wear; replace seals if necessary
Excessive switching noise: Verify solenoid holding force is normal; check return spring for fatigue; confirm oil viscosity is within specified range
Coil overheating: Check supply voltage is not excessive; verify solenoid power consumption is within rated range
Spool sticking: Check oil cleanliness; verify filtration precision meets ≤ 30 μm requirement
