SV1-10 Servo Valve | EMG Proportional Directional Valve | 315 Bar

The EMG SV1-10 Series Proportional Directional Servo Valves are precision-engineered control components designed for the most demanding industrial environments, such as hot and cold rolling mills and paper processing lines. Acting as the “brain” of the hydraulic circuit, the SV1 series provides high-dynamic flow and direction control via electrical signals. At LIC Hydraulic, we ensure our SV1 series products offer 100% mechanical and electrical interchangeability with OEM standards. Each valve undergoes rigorous simulated dynamic testing at pressures up to $315 \text{ Bar}$ to guarantee minimal hysteresis and maximum positioning accuracy.

Technical Specifications (Bulleted List)

• Product Series: EMG SV1-10 (Covers 4, 8, 16, 48 flow ratings)

• Nominal Size: NG10

• Nominal Flow ($Q_{nom}$): $4 \text{ L/min}$ / $8 \text{ L/min}$ / $16 \text{ L/min}$ / $48 \text{ L/min}$ (at $\Delta p=70 \text{ Bar}$ per land)

• Maximum Operating Pressure: $315 \text{ Bar}$ ($31.5 \text{ MPa}$)

• Supply Voltage: $24 \text{ VDC}$ / $\pm 10 \text{ V}$ analog signal

• Control Mechanism: Proportional electro-hydraulic with LVDT position feedback

• Operating Temperature Range: $-10^\circ\text{C}$ to $+70^\circ\text{C}$

• Recommended Oil Cleanliness: ISO 4406 18/16/13 (NAS 7 or better)

Key Technical Advantages

• Superior Dynamic Response: Equipped with optimized electromagnetic drives, these valves feature high frequency response rates, allowing real-time tracking of complex closed-loop control commands.

• High-Pressure Wear Resistance: The valve spool and sleeve are manufactured from specially heat-treated high-alloy steel, rated for $315 \text{ Bar}$ and offering excellent resistance to erosion and wear in harsh environments.

• Precise Zero-Point Calibration: Each valve is factory-calibrated to ensure minimal internal leakage at the null position, significantly improving system stability and energy efficiency.

• Drop-in Replacement: All interface dimensions and electrical connections are fully compatible with the original EMG SV1 series, enabling immediate replacement without any hardware or software modifications.

Application Areas

• Metallurgy: Strip edge control systems (EPC/CPC) in rolling mills and hydraulic actuator positioning.

• Heavy Machinery: Precision slide control for forging presses and tension regulation systems in paper mills.

• Power Generation: Hydraulic execution units for steam turbine governors.

Expert Maintenance Tips

• Flushing Before Installation: Before mounting a new valve, the hydraulic system must be thoroughly flushed (using a flushing plate instead of the servo valve) to eliminate particles that could cause spool seizure.

• Filtration Integrity: The SV1 series is highly sensitive to fluid contamination. Ensure a high-precision pressure filter is installed upstream and replace filter elements immediately upon differential pressure warning.