34BM 34EY 34BY Series Solenoid Directional Valve | 34BM-H10B-T 34BY-H10B-T | AC220V DC24V Hydraulic Valve

The 34 Series (including 34BM, 34EY, 34BY, etc.) directional control valves by Chengyuan Hydraulic are high-precision components engineered for automated hydraulic systems. This series covers solenoid-operated, electro-hydraulic, and manual control methods. By optimizing the clearance between the spool and the valve body, we have significantly minimized internal leakage. Every valve undergoes 100% simulated operational testing to ensure responsive switching and zero-sticking under rated pressure, providing a reliable and 100% interchangeable alternative to standard industrial valves.

Technical Specifications (Bulleted List):

• Model Range: 34BM-H10B-T, 34BY-H10B-T, 34BH-H10B-T, 34BO-H10B-T

• Nominal Size: $10\text{ mm}$ (H10 Series)

• Max Operating Pressure: $31.5\text{ MPa (315 bar)}$

• Max Flow Rate: $60\text{–}120\text{ L/min}$ (depending on spool function)

• Control Voltage: AC 220V / DC 24V (Optional)

• Fluid Medium: Mineral oil, Phosphate ester hydraulic fluid

• Medium Temperature Range: $-20\text{°C}$ to $+70\text{°C}$

• Required Filtration: $\le 25\text{ }\mu\text{m}$

Key Technical Advantages:

• Precision Cast Valve Body: Constructed from high-strength cast iron with secondary aging treatment to eliminate internal stress. This ensures the valve bore remains distortion-free under high-pressure spikes, maintaining smooth spool movement.

• High-Response Solenoids: Equipped with fully enclosed wet-type electromagnets, offering superior heat dissipation and insulation. Designed for high switching frequencies with an exceptionally low failure rate under heavy loads.

• Low-Leakage Spool Technology: Spools are precision-ground from high-alloy steel (hardness $> \text{HRC58}$). The unique oil groove design balances lateral forces and minimizes internal bypass loss at high pressures.

• Versatile Spool Functions: Available in M, H, Y, and O configurations to meet diverse logic requirements such as system pressure relief, locking, and unloading.

Application Areas:

• Machine Tools: Directional control for CNC tables and grinding machines.

• Injection Molding: Programmed control for clamping and injection mechanisms.

• Metallurgical Equipment: Automated circuits in steel mill hydraulic stations and rolling mills.

Expert Maintenance Tips:

• Voltage Stability: Ensure the power supply fluctuation is within $\pm 10\%$. Low voltage can cause insufficient suction leading to coil burnout, while high voltage accelerates aging.

• Strict Contamination Control: Solenoid valves are extremely sensitive to particles. If action is sluggish or the valve fails to reset, check the oil cleanliness and inspect the spool for debris.

• Manual Override: During commissioning, the manual push-button can be used for forced switching. Ensure the manual override is released before normal operation.