Model Interpretation

D662: NG16 standard installation base, ServoJet jet pipe pilot, valve body integrated electronic control module series

4083: Flow coding, unilateral throttling pressure difference ΔP = 35 bar, rated flow 920 L/min, flow higher than 4065 (760 L/min); standard configuration includes internal control T return oil + Y independent external oil outlet; common suffix D02HABF6VSX2 is equipped with O-type neutral function, NBR nitrile seal, ±10V differential voltage command, 7-core circular aviation connector, full stroke LVDT valve core position feedback. Technical Specifications

Hydraulic parameters

Rated flow rate: 920L/min (single throttle port with 35bar pressure difference); 70bar pressure difference limit flow ≈ 1780L/min

Pressure-bearing: Maximum P/A/B main oil circuit 350bar; Internal control T return oil allowable working pressure ≤ 50bar; External leakage Y port withstands 350bar Moog Inc.

Dynamic response: Supply pressure 210bar condition, 100% full stroke step response < 25ms

Control accuracy: Hysteresis < 0.2% FS, resolution < 0.1% FS, -20~55℃ full temperature zero drift < 2.1% FS

Zero position leakage: 0.55~3.0L/min

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

Overall machine net weight: 3.45kg

Electrical parameters

Power supply: DC24V (18~32VDC wide voltage input), total machine static power consumption ≤ 580mA

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

Electromagnetic compliance: EN55011 industrial EMC electromagnetic compatibility certification Moog Inc.

Interface and communication configuration

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

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 oil impurities than nozzle baffles, and has a lower failure rate in metallurgical and die-casting oil conditions.

The built-in LVDT valve core is fully closed-loop, and the onboard drive circuit automatically compensates for zero-point offsets due to high and low temperatures, allowing for 24-hour uninterrupted continuous heavy-load operation.

The D02 model is equipped with an O-type neutral position, and the power-off spring automatically returns to the neutral position to lock the A/B oil ports. The hydraulic cylinder maintains pressure lock and is locked in position, meeting the safety standards for equipment failure shutdown.

The super-large flow passage and linear flow characteristics enable a single valve to independently achieve seamless switching among position, speed, and pressure multi-closed-loop control. Applicable scenarios

Hot rolling / cold rolling unit AGC press-down system for thick plates, multi-directional forging hydraulic unit with tens of thousands of tons capacity, high-speed injection press of large heavy horizontal die-casting machine, large-scale hydraulic loading test bench for ships, giant composite material hot pressing forming equipment, super-large hydraulic fatigue comprehensive test bench.

Operation and maintenance instructions

A 3μm high-pressure precision filter must be installed at the front end of the main oil inlet pipe. The first set of filter elements should be replaced 15 working days after the new machine is put into operation.

Power strong current cables and shielded control signal lines are laid in separate channels, avoiding harmonic interference from frequency converters and high-power motors to the analog control signals.

Zero point and gain are factory-calibrated. Only minor electrical fine-tuning can be done on site. It is strictly prohibited to disassemble the pilot and main valve core assembly of the jet pipe privately.

When the equipment is idle and sealed for a long time, all P/T/A/B/Y oil ports should be blocked. It should be stored in a dry and dust-proof warehouse to delay the aging and leakage of the seals.