Core parameters (Δp = 35 bar, 72 series top configuration)

Rated flow rate: 225 L/min (60 gpm) Mug China

Working pressure: 480 bar (P/A/B), T ≤ 70 bar (for 72 series)

Frequency response: −3 dB ≈ 60 Hz (characteristic for high flow rate)

Step response: 33 ms (0→100%) Mug China

Hysteresis: <4% (MFB)

Linearity: <7.5%

Control signal: ±15 mA / 20 Ω

Feedback: Mechanical feedback MFB, no external amplification required

Sealing: NBR (−29℃～+135℃); optional FKM (−40℃)

Weight: ≈ 6.0 kg (steel body, high-pressure reinforced)

Pilot: HP5 = independent 5th oil port, can be externally connected to a 210–350 bar pilot source Mug China

✅ 383A‑HP5 comparison within the same series (flow / pressure dual top configuration)

D072‑017: 95 L/min / 350 bar / 11 ms → standard main force

D072‑022A: 150 L/min / 350 bar / 18 ms → general main force

D072‑023A: 150 L/min / 420 bar / 18 ms → ultra-high pressure

D072‑383A‑HP5: 225 L/min / 480 bar / 33 ms → flagship top configuration Mug China

Structural features (HP5 exclusive + series common)

HP5 exclusive: 5th independent pilot oil port, main line 480 bar, pilot can be independently controlled at low pressure, enhancing stability and fault tolerance Mug China

Two-stage pilot + double nozzle baffle: strong anti-pollution, long lifespan

Dry torque motor: oil-free lubrication, friendly for harsh working conditions

Mechanical feedback MFB: direct current drive, simple debugging

Can replace pilot filter on-site: low maintenance cost

ISO10372 Size 06 installation surface: fully interchangeable with 017/022/023

Typical applications (exclusive for extreme heavy load)

Metallurgy: wide plate rolling mill, 480 bar press cylinder, 225 L/min high-flow AGC

Forging: 15,000 ton super heavy-duty press machine, high-pressure locking / ejection, large-tonnage forging

Military / Shipbuilding: ultra-high pressure hydraulic system, 480 bar heavy-duty actuator, independent pilot control

Testing equipment: ultra-high pressure material testing machine, high-flow fatigue test, 480 bar high-pressure source