Model Code Definition

D662 = Base model specification: NG16 ISO4401-07 installation dimension, ServoJet jet-pipe pilot construction, built-in integrated servo amplifier without external drive module

Z4615 = Exclusive factory flow trim code including fixed rated flow parameter, preset null offset value, locked amplifier gain and customized internal pilot matching components

K = Wide-temperature reinforced electronic configuration with full-temperature zero drift correction for variable-temperature industrial environments

Technical Specifications

Hydraulic Parameters

Rated Flow:265 L/min @35bar single-land differential pressure; peak instantaneous flow 412 L/min under 70bar supply differential pressure

Max Working Pressure:P/A/B main control ports 350bar; internal T drain ≤50bar; standalone Y external drain withstand full 350bar working pressureMoog Inc.

Full Stroke Step Response:≤25.8ms at standard 210bar supply oil pressure

Control Accuracy:Hysteresis＜0.19%FS, Resolution＜0.075%FS, overall thermal drift(-20℃~+60℃)＜1.98%FS

Null Leakage:0.50~3.12 L/min

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

Net Weight:3.79kg

Electrical Parameters

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

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

EMC Compliance:Conforms to EN55011 industrial electromagnetic compatibility standard; standard 7-pin military circular connector reaching IP65 protection after complete cable assembly

Port & Connection Configuration

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

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

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

Core Functions

1.Patented ServoJet jet-pipe pilot provides outstanding anti-contamination performance compared to conventional nozzle-flapper pilot, securing stable continuous operation under moderately contaminated hydraulic fluid in heavy-duty production sitesMoog Inc..

2.Integrated matched amplifier cooperates with full-spool LVDT closed-loop feedback to automatically compensate neutral drift induced by ambient temperature variation; K-type optimized circuit drastically improves zero-point stability under wide temperature span.

3.Spring-centered fail-safe spool design:main spool mechanically returns to neutral upon power loss to block A/B oil passages and lock actuator position for equipment safety protection.

4.Optimized internal flow runner maintains stable linear flow gain, supports flexible switching among position, velocity and pressure three closed-loop control modes.

Typical Application

Heavy-duty aluminum hot extrusion production line, medium & heavy steel strip rolling mill tension control system, large automotive die-casting clamping hydraulic unit, ultra-high load hydraulic fatigue test bench, large tonnage hot forging hydraulic press equipment.

Installation & Maintenance Instructions

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

2.Arrange power cable and shielded control wire inside separated wiring troughs to avoid inverter harmonic interference on analog control command signal.

3.Null offset and flow gain are fully pre-calibrated at MOOG original factory; only slight on-site potentiometer fine trimming permitted; complete disassembly of ServoJet pilot and main spool assembly is strictly forbidden.

4.Seal all unused hydraulic ports with dedicated blank plugs during spare inventory storage; store inside dry dustproof warehouse to prevent FKM fluororubber seal ageing and hydraulic medium leakage.