Model Code Definition

D662 = NG16 ISO4401-07 mounting size, ServoJet jet-pipe pilot design, onboard embedded amplifier series

4602 = flow specification coding: rated flow 360 L/min @ ΔP=35bar per single metering land, internal T return oil passage plus separated external Y drain structural layout

K = factory preset customized null offset and flow gain trimming for non-standard flow characteristic optimization

Technical Specifications

Hydraulic Parameters

Rated Flow: 360 L/min @35bar single land pressure drop; maximum approx 620 L/min under 70bar differential supply pressure

Max Working Pressure: P/A/B main control ports 350bar; internal T drain ≤50bar; standalone Y external drain port rated up to 350barMoog Inc.

Dynamic Response: Full 0~100% step response ≤29ms at 210bar supply pressureMoog Inc.

Control Accuracy: Hysteresis＜0.2%FS, Resolution＜0.1%FS, total thermal drift (-20℃~+55℃)＜2.5%FS

Null Leakage: 0.62~3.4 L/min

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

Net Weight: 3.81kg

Electrical Parameters

Power Supply: 24VDC wide-range input (18~32VDC), static operating current ≤690mA

Standard Command Signal: ±10VDC differential analog input; optional ±10mA /4~20mA current control signal upon customized order

EMC Compliance: Meet EN55011 industrial EMC standard, electrical connector protection grade IP65

Port & Connection Configuration

Hydraulic Interface: Standard ISO4401-07 NG16 mounting hole layout; P supply port, built-in T internal drain, A/B actuator control ports, independent Y external drain port

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

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

Core Functions

Patented ServoJet jet-pipe pilot construction features superior anti-contamination performance compared with traditional nozzle-flapper pilot, ensuring long-term steady operation under moderately contaminated hydraulic fluid in severe industrial working conditions.

Embedded full-spool LVDT closed-loop matching onboard amplifier automatically compensates ambient-temperature-triggered null drift, supporting continuous 24-hour full-load nonstop operation.

Standard spring-centered neutral spool configuration: spool returns to middle position once power failure occurs to lock A/B oil chambers and retain workpiece position to satisfy equipment fail-safe protection demand.

Optimized internal flow channel maintains linear flow gain, supporting flexible switching among position, velocity and pressure closed-loop control modes on single valve body.

Typical Application

Large tonnage hot forging hydraulic press, heavy automotive stamping production line, wide-strip steel rolling mill tension control, multi-specimen high-load hydraulic fatigue test bench, oversized precision injection molding clamping system, large composite material hot-press forming hydraulic equipment.

Installation & Maintenance Instructions

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

Separate power cable and shielded control wire inside independent wiring ducts to avoid frequency converter harmonic interference on analog control command.

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

Seal all hydraulic ports with dedicated blocking plugs during long-term spare part storage; store inside dry dustproof warehouse to avoid rubber seal aging and hydraulic oil leakage.