D663 = Base series: ISO4401-05 NG10 installation size, ServoJet jet-pipe pilot stage, embedded integrated drive electronics + full-travel LVDT spool closed-loop feedback333 = Factory exclusive fixed trim number, pre-calibrated rated flow, fixed null bias value, locked amplifier gain and matched original pilot assemblyB = Standard industrial base spec: anti-vibration optimized PCB substrate, standard composite NBR+FKM base sealing, regular ambient temperature calibrationR16 = Custom PCB revision code: R16 modified amplifier circuit with optimized anti-interference EMC layout, improved temperature drift suppression circuit vs standard B versionK01 = Command signal configuration: factory preset 4~20mA current input control mode (alternate ±10VDC analog available per original order)F = Fluorocarbon FKM full-body sealing upgrade, compatible with phosphate ester fire-resistant hydraulic fluid besides standard mineral oilON = Spool configuration: zero overlap linear flow characteristic, spring centered fail-safe neutral return on power cutSS2 = Hydraulic drain + electrical connector spec: dual independent external Y drain port layout; 7-pin stainless steel military circular connector, IP67 upgraded sealing for humid & dusty working environment

Rated Flow:55 L/min @35bar single-land differential pressure; peak instantaneous flow 96 L/min @70bar supply differential pressureMax Working Pressure:P/A/B main control ports up to 350bar; internal T drain ≤50bar; dual SS2-configured independent Y external drain withstand full 350bar rated pressureFull Stroke Step Response:≤22.8ms under standard 210bar supply oil pressureControl Precision:Hysteresis＜0.185%FS, Resolution＜0.07%FS, overall thermal drift(-20~+80℃)＜2.18%FSNull Leakage:0.35~2.50 L/minWorking Medium:Anti-wear mineral hydraulic oil / phosphate ester fire-resistant fluid (F seal upgrade); cleanliness NAS6~7 / ISO4406 17/14/11, operating fluid temperature -20℃~+80℃Net Weight:3.05kg

Input Power Supply:24VDC wide range input(18~32VDC), static standby current ≤620mA (R16 PCB minor current adjustment vs standard B)Standard Control Command:Factory fixed 4~20mA analog current input per K01 definition; ±10VDC optional by rework calibrationEMC Standard:EN55011 industrial EMC, R16 circuit enhanced surge & inverter harmonic immunity; SS2 stainless 7-pin circular connector, IP67 protection rating after full cable assembly

Hydraulic Interface:Standard ISO4401-05 NG10 hole layout, separated P supply port, A/B actuator ports, built-in T internal drain + dual independent Y external drain defined by SS2 suffix; standard cast valve body with F full fluorine seal upgrade for all port sealing surfacesElectrical Interface:SS2 upgraded stainless steel 7-pin circular receptacle integrating power supply, 4~20mA control signal and full-range LVDT feedback; double-shielded control cable with single-point cabinet grounding; R16 PCB adds built-in surge absorption circuit for field wiring anti-interferenceControl Mode:Pure analog closed-loop regulation, no digital fieldbus communication interface

1.Patented ServoJet jet-pipe pilot features superior anti-contamination capability over traditional nozzle-flapper design, stable long-term continuous operation under moderately contaminated hydraulic mediumMoog Inc.。2.R16 customized PCB reduces circuit thermal drift; F full fluorocarbon sealing expands medium compatibility to fire-resistant hydraulic fluid besides conventional mineral oil; built-in LVDT closed-loop automatically compensates spool position deviation caused by ambient temperature variation.3.ON defined spring-centered fail-safe spool:main spool automatically returns to neutral 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; SS2 dual external Y drain avoids backpressure interference to internal pilot for high precision control.

Fire-resistant hydraulic medium required metallurgical rolling auxiliary servo, automotive stamping hydraulic press with fire-proof oil circuit, rubber vulcanization precision forming equipment, high-humidity offshore auxiliary hydraulic test bench, medium-tonnage injection molding core pulling servo control, fatigue test rig with phosphate ester hydraulic system.

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 4~20mA analog command signal, fix valve with standard flat mounting washers; SS2 stainless connector needs silicone waterproof sealant at wiring joint for humid site installation.3.Null offset and flow gain fully pre-calibrated at MOOG factory; only minor on-site potentiometer fine adjustment permitted; complete disassembly of ServoJet pilot and main spool assembly is strictly prohibited; F fluorine seals cannot be replaced with standard NBR spare seals.4.Plug all unused hydraulic ports with original blank plugs during spare part storage; store in dry dustproof warehouse to prevent fluorine seal ageing and hydraulic fluid leakage.