Full model breakdown explanation:

D662: NG16 mounting surface, ServoJet jet pipe pilot, built-in circuit board type servo valve series

4015: Basic flow code, single-sided ΔP = 35bar rated flow 270L/min

D02: Valve core function + power-off structure, O-type neutral function, power-off spring centering, AB load oil ports closed for holding pressure, internal control return oil T + independent external leakage Y dual return oil structure

H: Pilot supply oil rated 280bar pressure rating configuration

A: Zero-opening linear valve core, four-way throttling structure

B: Mineral oil standard nitrile seal, applicable at normal temperature -20~+80℃

F: System rated supply oil 210bar calibrated condition, factory-set zero point and gain based on 21MPa

6: 7-core standard circular aviation plug electrical interface

V: ±10VDC differential voltage analog control instruction

SX: Built-in LVDT valve core closed-loop feedback, onboard automatic temperature drift compensation circuit

2B: Factory special calibration version (distinguishing from 2A standard version, fine-tuning zero position gain, suitable for heavy-load low-speed closed-loop conditions)

Hydraulic parameters

Rated flow: 270L/min (single-sided throttling pressure difference 35bar); supply pressure 70bar pressure limit flow ≈ 555L/min

Pressure rating: P/A/B main oil port maximum 350bar; internal control T return oil ≤ 50bar; external leakage Y port pressure rating 350bar

Dynamic response: Supply pressure 210bar, 100% full stroke step response < 15ms

Control accuracy: hysteresis < 0.2% FS, resolution < 0.1% FS, zero point drift in -20~55℃ full temperature range < 1.5% FS

Zero position leakage: 0.28~1.7L/min

Oil requirements: anti-wear mineral hydraulic oil, cleanliness NAS6~7 grade, oil temperature -20℃~+80℃

Overall machine net weight: 2.76kg

Electrical parameters

Power supply: DC24V (18~32VDC wide input), static power consumption of the entire machine ≤ 400mA

Control signal: standard ±10VDC differential voltage input, no 4~20mA current option

EMC: complies with EN55011 industrial electromagnetic compatibility standard

Interface and communication configuration

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

Electrical interface: 7-core circular aviation socket, integrated DC24V power supply, ±10V control signal, LVDT feedback wiring; control line uses double-layer shielded cable, control cabinet single-point grounding

Communication form: pure analog closed-loop control, no Profinet/Canopen etc. bus interface Core function

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

Built-in LVDT full-closed-loop valve core sampling, drive board real-time compensates for temperature zero-point offset, excellent stability during long-term operation

D02 neutral structure, automatically locks A/B load chambers upon power loss, keeps the cylinder in its original position and locks it, suitable for equipment to safely stop and maintain pressure

High-flow linear gain is stable, capable of completing multi-mode closed-loop switching control of position, speed, and pressure with a single valve. Applicable scenarios

Large cold chamber die-casting machine high-speed injection unit, 8000T and above heavy injection molding machine injection closing loop, wide and thick plate rolling machine hydraulic lowering, ten-thousand-ton forging hydraulic control system, aviation hydraulic comprehensive test bench, heavy-load component fatigue mechanics testing machine.

Operation and maintenance instructions

Install a 3μm high-pressure precision filter at the front end of the oil inlet pipeline. Replace the first set of filter elements 15 working days after the new machine is put into operation.

Separate the power supply line and the shielded control line wiring in the separate wiring troughs to avoid power interference to the control signals.

The zero point is the exclusive factory calibration of the original 2B version. On-site only allows ±3% electrical fine-tuning. It is strictly prohibited to disassemble the pilot component and the main valve core of the jet pipe.

When the equipment is left idle and sealed for a long time, fully seal all oil ports P/T/A/B/Y, store in a dust-proof and dry warehouse, and avoid aging and oil leakage of the sealing components.