Model Code Definition

D663 = Base series: ISO4401-05 NG10 installation size, ServoJet jet-pipe pilot structure, embedded integrated drive electronics + full-travel LVDT spool position closed-loop feedback

333 = Exclusive factory trim code, pre-calibrated rated flow, fixed null bias, locked amplifier gain and matched internal pilot assembly

B = Standard industrial specification: anti-vibration optimized PCB, standard composite sealing, general ambient calibration without explosion-proof or cryogenic customization

Technical Specifications

Hydraulic Parameters

Rated Flow:55 L/min @35bar single-side differential pressure; peak instantaneous flow 96 L/min @70bar supply differential pressure

Max Working Pressure:P/A/B control ports up to 350bar; internal T drain ≤50bar; standalone Y external drain withstand full 350bar pressure

Full Stroke Step Response:≤22.8ms under 210bar standard supply oil pressure

Control Precision:Hysteresis＜0.185%FS, Resolution＜0.07%FS, total thermal drift(-10~+70℃)＜2.18%FS

Null Leakage:0.35~2.50 L/min

Working Medium:Anti-wear mineral hydraulic oil, cleanliness NAS6~7 / ISO4406 17/14/11, fluid temperature -20℃~+80℃

Net Weight:3.00kg

Electrical Parameters

Input Power Supply:24VDC wide range input(18~32VDC), static standby current ≤595mA

Standard Command Signal:±10VDC differential analog input; ±10mA /4~20mA current signal available by factory custom order

EMC Standard:Comply with EN55011 industrial EMC standard; 7-pin military circular connector, IP65 protection after full cable assembly

Port & Connection Configuration

Hydraulic Interface:Standard ISO4401-05 NG10 hole layout, separated P supply port, A/B actuator ports, built-in T internal drain plus independent Y external drain; standard cast valve body for B version without reinforced casing

Electrical Interface:7-pin circular receptacle integrating power supply, analog control signal and full-range LVDT feedback; double-shielded control cable with single-point cabinet grounding

Control Mode:Pure analog closed-loop regulation, no digital fieldbus communication interface

Core Functions

1.Patented ServoJet jet-pipe pilot delivers superior contamination resistance versus traditional nozzle-flapper design, stable long-cycle running under moderately contaminated hydraulic medium。

2.B-type standardized PCB reduces routine temperature drift, compound sealing improves compatibility with conventional mineral hydraulic oil; built-in LVDT closed-loop automatically compensates spool position deviation induced by ambient temperature variation.

3.Spring-centered fail-safe spool design:main spool returns to neutral automatically upon power failure to block A/B oil paths and lock hydraulic cylinder for equipment safety protection.

4.Zero-overlap spool maintains linear flow characteristic, supports seamless switching among position, speed and pressure three closed-loop control modes.

Typical Application

Automotive component stamping hydraulic press, rubber vulcanization forming equipment, universal material fatigue test bench, metallurgical rolling mill auxiliary servo control, medium-tonnage injection molding core pulling hydraulic system, general industrial precision hydraulic cylinder servo drive.

Installation & Maintenance Instructions

1.Mount 3μm high-pressure precision inline filter on upstream supply pipeline; replace initial filter cartridge after 15 working days of commissioning startup.

2.Separate power cable and shielded control wiring inside independent wiring trough to avoid frequency converter harmonic interference on analog command signal, fix valve with standard flat mounting washers.

3.Null offset and flow gain are fully pre-calibrated at MOOG factory; only minor on-site potentiometer fine adjustment allowed; complete disassembly of ServoJet pilot and main spool assembly is strictly prohibited.

4.Plug all unused hydraulic ports with original blank plugs during spare part storage; store in dry dustproof warehouse to prevent seal ageing and hydraulic fluid leakage.