Model Description  

D662: Product series, NG16 mounting size secondary pilot servo valve  

4010: Customization code defining rated flow, spool function, electrical interface, and zero position configuration; complete suffix standard D02HABF6VSX2-A (full body specification code) Technical Specifications

Hydraulic Parameters  

Maximum operating pressure: P/A/B ports 350 bar (5000 PSI), internal control return T ≤ 50 bar, external leakage Y port up to 350 bar  

Rated flow: ΔP = 35 bar, single throttle side down 75 L/min  

Zero leakage: 0.15–1.2 L/min  

Response time: <12 ms for 100% step response  

Hysteresis <0.2%, resolution <0.1%, temperature drift at 55°C <1.5% FS  

Suitable media: Wear-resistant hydraulic oil, oil temperature -20°C to +80°C, fluid cleanliness NAS 6–7  

Net weight: 2.5 kg  

Electrical Parameters  

Power supply: DC24V (allowable range 18–32 VDC), maximum power consumption 300 mA  

Standard control signal: ±10V analog command, built-in valve position closed-loop drive  

EMC compliant with EN55011 industrial electromagnetic compatibility standard  

Interface and Communication Configuration  

Hydraulic mounting: ISO4401-07 (NG16) standard mounting plate, P inlet, T return, AB load ports, Y external drain port  

Electrical connector: Standard 7-pin circular aviation connector, integrated power, command, and feedback signals; cable must be shielded and grounded  

Control mode: Single-ended / differential ±10V analog input, no fieldbus interface Core Features

Built-in closed-loop: LVDT real-time captures spool position, with on-board circuit board closed-loop correction for high control accuracy and drift resistance.  

ServoJet jet-pilot design: superior resistance to fluid contamination compared to nozzle-flapper structure, enabling long-term operation without fine maintenance.  

Power-off centering spring ensures neutral position; standard model does not include fault-holding function (optional fail-safe locking version available).  

Flow linear closed-loop compatible with three types of hydraulic closed-loop control systems: position, velocity, and pressure.  

Applications:  

Die-casting machines, precision mold clamping in injection molding, plate rolling mills, testing machines, forging presses, aerospace test benches, and heavy-duty machine tool feed hydraulic systems.  

Installation and Maintenance Instructions:  

Install a precision high-pressure filter (3μm); regularly replace oil filter elements during initial system commissioning.  

Electrical shielding must be grounded at one end only; power and signal cables must not be routed together.  

Factory-calibrated zero point; on-site electrical zero adjustment is limited to minor tuning. Do not disassemble the pilot stage or spool assembly.  

Store in a dry, dust-free environment; seal unused valve ports to prevent rust when not in use.