Core parameters (Δp = 35 bar)

Rated flow rate: 250 L/min (maximum flow rate for D661 series)

Working pressure: 350 bar continuous / 350 bar peak

Frequency response: -3 dB ≈ 250 Hz (high response)

Hysteresis: <0.3% (closed-loop LVDT)

Zero drift: <0.5%/40°C

Power supply: 24 Vdc (18–32 Vdc), built-in high-performance amplifier

Control signal: ±10 V or 4–20 mA

Feedback: LVDT valve core closed-loop (full travel high precision)

Sealing: FKM (-29°C to +150°C), standard for high-temperature heavy-duty

Protection: IP65, EMC EN 61000-6-2/4

Weight: Approximately 3.0 kg

Top model overview of the same series (D061)

8412: 60 L/min, closed-loop, 180 Hz → standard closed-loop

861C: 100 L/min, closed-loop, 250 Hz → high-response closed-loop

8621C: 120 L/min, closed-loop, 280 Hz → top dynamic closed-loop

9321: 160 L/min, open-loop, 180 Hz → large flow open-loop

9411: 200 L/min, open-loop, 180 Hz → super large flow open-loop

9632A: 250 L/min, closed-loop, 250 Hz → super large flow + closed-loop + high response flagship Structural features

250 L/min ultra-high flow ServoJet先导： low noise, low pulsation, highly resistant to contamination, extremely long lifespan

LVDT full closed-loop + 24V high-power amplification: top precision, fast dynamics, strong anti-interference, suitable for precise heavy-duty applications

350 bar high-pressure forging valve body： for metallurgy， forging， casting， ships， test benches， etc.， ultra-high pressure and heavy-duty applications

Strengthened anti-vibration / wide temperature design： -40℃ to +85℃， 10g anti-vibration， stable performance in harsh environments for long-term use

Typical applications

Metallurgy： main press-down of rolling mills， AGC thickness control， 250 L/min high-flow closed-loop position / pressure

Forging / casting： closed-loop of large press machine sliders， high-speed mold locking， precise injection molding， ultra-high flow high-pressure

Ships / marine： steering gears， anchor gears， large hydraulic actuators， high-precision closed-loop control

Industrial testing： material testing machines， impact test benches， high dynamics + high flow + high-pressure closed-loop