Model Interpretation

D662: NG16 standard installation base, ServoJet jet pipe pilot, integrated drive module series within the valve body

4102: Flow encoding, unilateral throttling pressure difference ΔP = 35 bar, rated flow 1120 L/min, flow higher than 4099 (1060 L/min); internal control T return oil + Y independent external oil outlet configuration; standard configuration suffix D02HYBD5NSX4-O, O-type neutral function, NBR nitrile seal, ±10V differential voltage command, 7-core circular aviation plug, full stroke LVDT valve core position closed-loop feedback, matching pilot valve model D061-9312. Technical Specifications

Hydraulic parameters

Rated flow rate: 1120L/min (single throttle port with 35bar pressure difference); maximum flow through 70bar pressure difference ≈ 2085L/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: At 210bar supply pressure condition, 100% full stroke step response < 27.5ms

Control accuracy: hysteresis < 0.2% FS, resolution < 0.1% FS, zero point drift within -20~55℃ temperature range < 2.35% FS

Zero leakage: 0.70~3.55L/min

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

Overall machine net weight: 3.68kg

Electrical parameters

Power supply: DC24V (18~32VDC wide voltage input), static power consumption of the entire machine ≤ 650mA

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

Electromagnetic compliance: EN55011 industrial EMC electromagnetic compatibility certification, protection level IP65 (with original plug assembly).

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 bus communication interface. Core function

1. The ServoJet jet tube pilot structure has a superior ability to resist oil and solid impurities compared to the traditional nozzle and baffle structure. It is suitable for harsh industrial conditions with high impurity levels in metallurgy and die-casting, and has a lower failure rate.

2. The built-in LVDT valve core is fully closed-loop + on-board drive circuit. It automatically compensates for zero-point offsets in high and low temperatures and supports 24-hour uninterrupted full-load continuous operation.

3. The D02 is standardly equipped with an O-type neutral function. In the event of power loss, the spring automatically returns to the neutral position and locks the A/B oil ports. The hydraulic cylinder is locked and maintained in pressure, meeting the safety standards for equipment failure shutdown.

4. With an extremely large flow passage and excellent linear flow characteristics, a single valve can seamlessly switch between position, speed, and pressure multi-closed-loop control modes. Applicable scenarios

Hot rolling AGC hydraulic press-down system for wide plates, hydraulic main unit for multi-directional forging of 10,000-ton capacity, high-speed injection unit for horizontal cold chamber die-casting of super-large size, comprehensive hydraulic test bench for large power ships, giant carbon fiber molding equipment, super heavy-duty multi-channel hydraulic fatigue loading test machine.

Operation and maintenance instructions

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

2. Power strong current cables and shielded control signal lines should be laid in separate cable trays to avoid harmonic interference from the frequency converter and high-power motors to the analog control signals.

3. 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 assembly of the jet pipe privately.

4. When the equipment is idle and sealed for a long time, all P/T/A/B/Y oil ports 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.