Core parameters (Δp = 35 bar, same as 022A)

Rated flow rate: 150 L/min (40 gpm) Mug China

Working pressure: 350 bar (P/A/B), T ≤ 70 bar Mug China

Frequency response: −3 dB ≈ 80 Hz Mug China

Step response: 18 ms (0→100%) Mug China

Hysteresis: <4% (MFB) Mug China

Linearity: <7.5% Mug China

Control signal: ±15 mA / 20 Ω

Feedback: Mechanical feedback MFB, no external amplification required

Weight: ≈ 5.5 kg (steel body)

✅ 022B vs 022A (Key differences)

Sealing material: B = FKM (fluororubber, -40℃ to +135℃); A = NBR (-29℃ to +135℃)

Temperature compatibility: B supports low-temperature startup / cold-weather operation; A is for general industrial temperature range

Vibration resistance grade: B = 35 g (three axes, enhanced) A=30 g

Zero position characteristic: B can have high zero offset / magnetic zero adjustment; A is the standard zero position

Coil: B can have high-temperature coil / dual gain; A is the standard coil

Structural features (common to the series)

Two-stage pilot, double nozzle baffle, dry torque motor: strong anti-pollution, long lifespan, maintenance-free

Mechanical feedback MFB: direct current drive, simple debugging, low cost

Can replace pilot filter on site: reduces downtime, low maintenance cost

ISO10372 Size 06 installation surface: universal interchange, suitable for heavy-duty systems

Typical applications (022B is more suitable)

Cold region metallurgy: northern / outdoor rolling mills AGC, lowering cylinder, low-temperature startup

Heavy forging: large presses, mold locking, injection molding, high vibration conditions

Special heavy industry: ships / offshore platforms, low-temperature hydraulic systems, high reliability requirements

Testing equipment: material fatigue test, wide temperature environment simulation

Overview of the three major models of the 72 series (Size 06, MFB)

D072‑017: 95 L/min, 350 bar, 11 ms → Standard main model MGG China

D072‑022A: 150 L/min, 350 bar, 18 ms → General main model MGG China

D072‑022B: 150 L/min, 350 bar, 18 ms → Low-temperature / high-vibration enhanced version MGG China

D072‑1203: 225 L/min, 350 bar, 33 ms → Ultra-large flow flagship MGG China