Model Interpretation

D662: NG16 Installation, Jet Pipe Pilot Built-in Electronic Closed-Loop Servo Valve Series

4014: Basic Specification Code, Single-sided Pressure Difference 35bar Rated Flow 240L/min (4010 = 75L/min, 4011 = 100L/min, 4012 = 140L/min, 4013 = 190L/min, 4014 = 240L/min), Standard Configuration includes internal return oil + independent Y external oil outlet; Suffix Code (DxxHABF6VSX2HA) is the same as the general series, sequentially defining the neutral function, pressure resistance, sealing, electrical signal, and connection specification.

Hydraulic parameters

Rated flow rate: 240L/min (ΔP = 35bar / unilateral throttling pressure difference); 495L/min at 70bar pressure difference condition

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

Step response: Full stroke 100% step < 14.5ms (standard working condition with 210bar supply pressure)

Control accuracy: Hysteresis < 0.2% FS, resolution < 0.1% FS, zero point drift ≤ 1.5% FS at 55℃ full temperature range

Zero leakage: 0.25~1.6L/min

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

Overall net weight: 2.72kg

Electrical parameters

Power supply: DC24V (allowable 18~32VDC wide input range), total machine power consumption ≤ 380mA

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

Electromagnetic compatibility: Compliant with EN55011 industrial EMC standards

Interface and communication configuration

Hydraulic interface: ISO4401-07 standard installation surface, P inlet, T internal control return oil, AB load oil ports, Y independent external leakage oil ports

Electrical interface: 7-pin round aviation plug, integrated power supply, control instructions, valve core feedback terminal, control line uses shielded single-ended grounding

Control form: Pure analog closed-loop control, no industrial bus communication interface Core function

Built-in LVDT full-closed-loop valve core position detection, onboard circuit automatically compensates for zero-point offset due to high/low temperatures in real time, ensuring excellent control stability.

ServoJet jet pipe pilot structure, superior to nozzle baffle structure in resisting oil liquid impurities, with low long-term failure rate.

D02 is equipped with O-type neutral function, when power is lost, the spring automatically returns to the center to close the load oil port, achieving lock-up of the cylinder's neutral position.

With extremely large flow capacity, it is suitable for high-speed and large-flow cylinder operations, featuring excellent flow linearity and compatibility with high-precision pressure/position closed-loop control. Applicable scenarios

Super-large injection molding machine's injection sealing closed-loop system, heavy-duty die-casting machine's mold locking / high-speed injection unit, wide-thick plate rolling machine's hydraulic lowering, ten-thousand-ton forging equipment, large-scale aviation hydraulic test bench, heavy-load mechanical fatigue testing machine.

Operation and maintenance instructions

Install a 3μm precision high-pressure filter at the front end of the high-pressure oil inlet. Replace the filter element after 15 days of the new machine's initial operation.

Separate the power supply line and control shielding line into separate cable trays. The shielding cable is only grounded on one side of the control cabinet.

The factory performs original factory calibration of the zero point. On-site, only a small-scale electrical zero point adjustment is allowed. It is strictly prohibited to disassemble the pilot component and the main valve core privately.

When in long-term storage, completely seal the hydraulic oil ports. Store in a dry and dust-proof environment to avoid aging and failure of the sealing components.