Model Interpretation

D662: NG16 installation base surface, ServoJet jet pipe pilot, valve body built-in drive electronic module series

4065: Flow coding, unilateral throttling pressure difference ΔP = 35 bar, rated flow 760 L/min, flow greater than 4050 (630 L/min); standard configuration includes internal control T return oil + Y independent external oil outlet; common suffix D02HABF6VSX2 is equipped with O-type neutral position, NBR nitrile seal, ±10V voltage command, 7-core circular aviation plug, full travel LVDT valve core position feedback. Technical Specifications

Hydraulic parameters

Rated flow rate: 760L/min (single throttle port with 35bar pressure difference); maximum flow capacity at 70bar pressure difference ≈ 1525L/min

Pressure resistance: Maximum pressure at the main oil ports of P/A/B is 350bar; internal control T return oil working pressure ≤ 50bar; external leakage Y port withstands 350bar pressure

Dynamic response: In 210bar supply pressure condition, 100% full stroke step response < 23.5ms

Control accuracy: hysteresis < 0.2% FS, resolution < 0.1% FS, zero point drift within -20~55℃ is ≤ 2.0% FS

Zero leakage: 0.50~2.8L/min

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

Overall machine net weight: 3.38kg

Electrical parameters

Power supply: DC24V (18~32VDC wide voltage input), static power consumption of the entire machine ≤ 550mA

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

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

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 circular aviation socket, integrated power supply, control signal, LVDT feedback wiring, control line double-layer shielding, single-point grounding of control cabinet

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

The servojet jet pipe pilot structure has a better ability to resist solid impurities in the oil than the nozzle baffle. It has a lower failure rate in metallurgical and die-casting environments with harsh impurity 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. The 24-hour continuous heavy-load operation stability is excellent.

The D02 model is equipped with an O-type neutral function. In the event of power loss, the spring automatically returns to the center and locks the A/B oil ports. The hydraulic cylinder maintains pressure lock, meeting the safety standards for equipment fault shutdown.

With a large flow passage and excellent linear flow characteristics, a single valve can independently complete seamless switching between position, speed, and pressure multi-closed-loop modes. Applicable scenarios

Large thick plate rolling mill AGC hydraulic lowering system, ten-thousand-ton multi-directional forging hydraulic unit, super-large horizontal cold chamber die-casting machine high-speed injection, heavy vessel hydraulic loading test bench, giant composite material molding equipment, high-power hydraulic comprehensive fatigue test bench.

Operation and maintenance instructions

A 3μm high-pressure precision filter must be installed at the front end of the main oil 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 cable trays to avoid 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 is allowed on site. It is strictly prohibited to disassemble the pilot and main valve core components of the jet pipe privately.

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