Model Interpretation

D662: NG16 installation base, jet pipe pilot, built-in drive closed-loop servo valve series

4037: Flow encoding, unilateral throttling pressure difference ΔP = 35 bar, rated flow 460 L/min, higher than 4036 (410 L/min); standard configuration includes internal control T return oil + independent Y external oil outlet; common suffix D02HABF6VSX2 is equipped with O-type neutral position, nitrile seal, ±10V voltage command, 7-pin aviation plug, LVDT full closed-loop feedback. Technical Specifications

Hydraulic parameters

Rated flow rate: 460L/min (single throttle edge pressure difference 35bar); maximum flow through pressure difference limit ≈ 935L/min

Pressure resistance: Maximum P/A/B main oil circuit 350bar; internal control T return oil ≤ 50bar; external leakage Y port withstands pressure 350bar

Dynamic response: Supply oil at 210bar condition, 100% full stroke step response < 20ms

Control accuracy: hysteresis < 0.2% FS, resolution < 0.1% FS, full temperature zero drift -20~55℃ < 1.8% FS

Zero position leakage: 0.38~2.3L/min

Applicable media: Mineral anti-wear hydraulic oil, oil cleanliness NAS6~7 grade, oil temperature -20℃~+80℃

Overall machine net weight: 3.2kg

Electrical parameters

Power supply: DC24V (18~32VDC wide voltage input), static power consumption of the entire machine ≤ 480mA

Standard control instructions: ±10VDC differential voltage, optional ±10mA, 4~20mA current signal

Electromagnetic certification: EN55011 industrial EMC specification

Interface and communication configuration

Hydraulic interface: ISO4401-07 NG16 standard installation holes, P inlet, T internal control return oil, A/B load oil ports, Y independent external leakage oil ports

Electrical interface: 7-pin round aviation socket, integrated power supply, control signal, LVDT feedback wiring, control line double-layer shielding, control cabinet single-point grounding

Control mode: Pure analog closed-loop control, no fieldbus communication interface Core function

The servojet jet pipe pilot structure has a better ability to resist solid impurities in hydraulic oil than nozzle baffles, resulting in a lower failure rate in dusty and impure conditions.

The built-in LVDT valve core position closed-loop system, along with onboard circuitry that automatically compensates for zero-point offsets due to temperature changes, ensures excellent stability during long-term continuous operation.

The D02 model is equipped with an O-type neutral function. In the event of power loss, the spring automatically aligns and seals the A/B oil ports, locking and maintaining pressure of the hydraulic cylinder, meeting the requirements for safe shutdown of the equipment.

With an extremely large flow capacity and excellent flow linearity, a single valve can independently achieve seamless switching between position, speed, and pressure closed-loop modes. Applicable scenarios

Ultra-large cold chamber die-casting machine high-speed injection system, ultra-heavy tonnage injection molding machine injection closing loop, wide and thick plate rolling machine AGC hydraulic lowering, large-scale free forging hydraulic unit, heavy-duty hydraulic comprehensive test bench, large-scale component fatigue strength testing machine.

Operation and maintenance instructions

Install a 3μm high-pressure precision filter at the front end of the oil inlet main pipe. Replace the first set of filter elements 15 working days after the new machine is put into use.

Separate the power cable and the shielded control line for wiring, avoiding harmonic interference from the frequency converter and motor to the analog control signal.

The zero point and gain are factory-calibrated. Only minor electrical fine-tuning is allowed on site. It is strictly prohibited to disassemble the pilot valve and main valve core components of the jet pipe privately.

When the equipment is idle and sealed for a long time, seal all P/T/A/B/Y oil ports. Store them in a dry and dust-proof warehouse to delay the aging and leakage of the sealing parts.