Core parameters (DEH condition, Δp = 70 bar)

Rated flow rate: 100 L/min (25 gpm)

Working pressure: 14 MPa (140 bar, P/A/B), T ≤ 70 bar (standard for power plant EH oil system)

Frequency response: -3 dB > 120 Hz (customized for high-frequency response in power plant)

Step response: ≈ 16 ms (0 → 100%)

Hysteresis: < 1.5% (high-precision DEH)

Linearity: < 3.0%

Control signal: ±15 mA / 20 Ω (standard for power plant)

Feedback: Mechanical feedback MFB, built-in spring tube zeroing (safety shut-off in case of power failure)

Sealing: NBR (-29℃ to +135℃, suitable for EH anti-fuel oil)

Weight: ≈ 5.5 kg

Medium: Polyether anti-fuel oil (EH oil), dedicated for power plant DEH

✅ 559A comparison within the same series (power vs industrial)

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

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

D072‑559A: 100 L/min / 140 bar / 16 ms / >120 Hz → Power plant DEH dedicated

D072‑383A‑HP5: 225 L/min / 480 bar / 33 ms → Industrial flagship

Structural features (customized for power plant)

DEH dedicated spring tube: automatic zeroing in case of power failure, safety shut-off of valves, in line with power plant safety regulations

High-response double nozzle baffle: >120 Hz frequency response, meeting the rapid valve dynamic requirements of steam turbines

Dry torque motor: resistant to EH oil corrosion, maintenance-free, long lifespan

Mechanical feedback MFB: direct current drive, no need for external amplification, simple debugging

On-site replaceable pilot filter element: online maintenance in power plant, reducing downtime

ISO10372 Size 06 installation surface: fully interchangeable with 017/022/023, suitable for power plant retrofit

Typical applications (power industry exclusive)

Thermal power: 300MW/600MW/1000MW unit DEH system, intermediate pressure speed regulating valve (intermediate regulating valve), high-pressure regulating valve (high regulating valve)

Nuclear power: EH oil system of steam turbines, valve control, high-precision flow regulation

Power station: gas turbine control, bypass valve, main steam valve servo control

72 Series Size 06 power / industrial matrix

D072‑559A: 100 L/min / 140 bar / 16 ms / >120 Hz → Power plant DEH main force

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

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

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

D072‑383A‑HP5: 225 L/min / 480 bar / 33 ms → Industrial flagship