Core parameters (Δp = 35 bar)

Rated flow rate: 120 L/min

Working pressure: 280 bar continuous / 315 bar peak; Valve body withstands 350 bar pressure

Frequency response: −3 dB ≈ 280 Hz (top-level high response)

Hysteresis: <0.25% (closed-loop LVDT)

Zero drift: <0.25%/40°C

Power supply: 24 Vdc (18–32 Vdc), top-level high response includes built-in amplifier

Control signal: ±10 V or 4–20 mA

Feedback: Closed-loop (high-precision LVDT displacement sensor)

Sealing: NBR (−29℃ to +135℃), optional FKM

Protection: IP65, enhanced EMC (heavy load / metallurgical harsh environment)

Weight: Approximately 2.5 kg

Comparison of key models in the same series (overview)

8412: 60 L/min, 180 Hz, hysteresis < 0.5% → standard closed-loop, normal working conditions

861C: 100 L/min, 250 Hz, hysteresis < 0.3% → high response, high speed, high precision

8621C: 120 L/min, 280 Hz, hysteresis < 0.25% → top-level dynamics, large flow + ultra-high response Structural features

Ultra-high flow optimization ServoJet先导： 120 L/min, low noise, low pulsation， strong anti-pollution， long lifespan

24V top-level high response amplifier + LVDT closed-loop: industry-leading dynamics + ultimate precision + extremely strong stability

High-pressure heavy-duty valve body design： suitable for metallurgy， forging， heavy-duty testing machines and other high-pressure impact conditions

Enhanced vibration / EMC design： long-term stable operation in harsh industrial environments

Typical applications

Metallurgical rolling mill： high-speed AGC thickness control， APC position control， rolling mill dynamic loading

Hydraulic testing machine： high-frequency dynamic force control / position control， fatigue test， high-speed loading

Forging / casting： high-speed high-precision mold locking， injection， slider position control

Heavy-duty industrial automation： large flow + ultra-high dynamic closed-loop system， high-speed precise positioning