Model Code Definition

D663 = D660 core product family, NG10 ISO4401-05 installation dimension, ServoJet jet-pipe pilot architecture, onboard amplifier + full-stroke LVDT spool closed-loop feedback design

Z = Factory non-standard custom calibration for spool flow gain and zero drift correction

954 = Special large-flow trim number, four-way spring-centered spool with customized overlap metering profile, factory fixed internal amplifier gain setting

C = Standard NBR nitrile sealing structure, unified single T drain port (no separate external Y drain), conventional internal amplifier anti-vibration layout

Technical Specifications

Hydraulic Parameters

Rated Flow:425 L/min @35bar single-side differential pressure; peak instantaneous flow 598 L/min @70bar supply differential pressure

Max Working Pressure:P/A/B main ports rated up to 350bar; integrated T drain maximum allowable pressure ≤210bar

Full Stroke Step Response:≤27.5ms under standard 210bar supply hydraulic pressure

Control Precision:Hysteresis＜0.25%FS, Resolution＜0.08%FS, total thermal drift(-20~+80℃)＜2.5%FS

Null Leakage:0.42~2.35 L/min based on customized spool overlap structure

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

Net Weight:3.65kg

Electrical Parameters

Input Power Supply:24VDC wide input range(18~32VDC), static standby operating current ≤830mA

Default Control Command:Factory preset ±10VDC differential analog input; ±10mA /4~20mA current signal available via factory recalibrationMoog Inc.

Connector Specification:Standard 7-pin military circular receptacle, IP65 protection after complete cable assembly

EMC Compliance:Complies with EN55011 industrial electromagnetic compatibility standard

Port & Connection Configuration

Hydraulic Interface:ISO4401-05 NG10 standard hole layout with independent P supply port, A/B actuator control ports, single shared internal T drain (no dedicated Y drain port), factory pre-installed standard NBR mounting gasket matching C suffix sealing specification

Electrical Interface:7-pin circular socket integrates 24V power supply, ±10VDC control signal and full-stroke LVDT spool feedback wiring; double-shielded control cable required with single-point cabinet grounding, no digital fieldbus communication function

Core Functions

1.Patented ServoJet jet-pipe pilot delivers outstanding contamination resistance compared with traditional nozzle-flapper pilot, supporting long-term stable operation under moderately contaminated hydraulic fluid environment.

2.Custom large-flow four-way spool realizes high-flow pressure/force closed-loop adjustment; onboard LVDT closed-loop dynamically compensates spool displacement drift induced by wide-range ambient temperature variation, C standard sealing satisfies conventional industrial temperature working condition.

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

4.Factory fixed amplifier gain optimized for large-flow heavy-duty operating condition; ±10VDC analog input features reliable anti-interference for medium-length wiring precision closed-loop control.

Typical Application

Heavy-duty hydraulic forging press master cylinder closed-loop force control, large-scale metallurgical hot rolling mill hydraulic cylinder high-precision positioning control, super-large load material fatigue test bench hydraulic drive system, heavy-duty die-casting equipment clamping & injection servo control, heavy-load aerospace structural part hot-forming hydraulic control system.

Installation & Maintenance Instructions

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

2.Arrange power cable and shielded control wire inside separate wiring troughs to avoid inverter harmonic interference to analog control signal; fix valve with standard flat washers following factory specified tightening torque during installation.

3.Flow gain and null offset parameters are fully pre-calibrated at MOOG factory; only minor on-site potentiometer fine adjustment permitted; full disassembly of ServoJet pilot assembly and main spool is strictly forbidden.

4.Seal unused spare hydraulic ports with original factory blank plugs for spare stock; store inside dry dustproof warehouse to prevent NBR rubber seal ageing and hydraulic oil leakage.