Model Interpretation

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

4050: Flow coding, unilateral throttling pressure difference ΔP = 35 bar, rated flow 630 L/min, flow greater than 4038 (510 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-pin aviation plug, full travel LVDT valve core feedback. Technical Specifications

Hydraulic parameters

Rated flow rate: 630L/min (single throttle port with 35bar pressure difference); 70bar pressure difference limit flow ≈ 1270L/min

Pressure resistance: Maximum 350bar for the main oil circuit in P/A/B; Internal control T return oil working pressure ≤ 50bar; External leakage Y port withstands 350bar pressure

Dynamic response: Supply oil at 210bar condition, 100% full stroke step response < 22ms

Control accuracy: Hysteresis < 0.2% FS, resolution < 0.1% FS, -20~55℃ full temperature zero drift < 1.9% FS

Zero position leakage: 0.45~2.6L/min

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

Overall machine net weight: 3.32kg

Electrical parameters

Power supply: DC24V (18~32VDC wide voltage input), total machine static power consumption ≤ 520mA

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

Electromagnetic compliance: EN55011 industrial EMC electromagnetic compatibility certification

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, control signal, LVDT feedback wiring, control line double-layer shielding, control cabinet single-point grounding

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 oil and solid impurities compared to nozzle baffles, resulting in a lower failure rate in dusty and impure working conditions.

The built-in LVDT valve core position closed-loop system, along with the onboard drive circuit, automatically compensates for zero-point offsets due to high and low temperatures, ensuring excellent stability during long-term continuous heavy-load operation.

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, ensuring the hydraulic cylinder maintains pressure lock and meeting the safety standards for equipment failure shutdown.

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

Ten-thousand-ton heavy forging unit main cylinder closed-loop, wide and thick plate hot rolling / cold rolling AGC hydraulic lowering system, super-large horizontal cold chamber die-casting machine high-speed injection, super heavy-duty hydraulic comprehensive test bench, large marine hydraulic loading test equipment, giant composite material molding press equipment.

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.

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.