Model Code Definition

D663 = D660 core product line, NG10 ISO4401-05 mounting dimension, ServoJet jet-pipe pilot construction, onboard amplifier + full-range LVDT spool displacement closed-loop feedback design

4031 = exclusive factory fixed trim number with pre-calibrated rated flow, fixed amplifier gain and null offset; basic configuration adopts zero-lap four-way spring centered spool with standard NBR seal; complete full model adds suffix codes for customized seal material, electrical connector and drain configuration options.

Technical Specifications

Hydraulic Parameters

Rated Flow:96 L/min @35bar single-side differential pressure; peak instantaneous flow 144 L/min @70bar supply differential pressure

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

Full Stroke Step Response:≤19.8ms under 210bar rated supply hydraulic pressure

Control Precision:Hysteresis＜0.18%FS, Resolution＜0.065%FS, overall thermal drift(-20~+80℃)＜2.10%FS

Null Leakage:0.19~1.62 L/min, critical zero-overlap linear metering spool design

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

Net Weight:3.19kg

Electrical Parameters

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

Standard Control Command:Factory preset ±10VDC differential voltage input; 4~20mA current signal available after factory recalibration

EMC Compliance:Conform to EN55011 industrial EMC standard; standard 7-pin military circular connector with IP65 protection after full cable assembly.

Port & Connection Configuration

Hydraulic Interface:ISO4401-05 NG10 standard hole layout including independent P supply port, A/B actuator control ports, separated internal T drain and standalone external Y drain, factory equipped NBR sealing gaskets for mounting surface.

Electrical Interface:7-pin circular receptacle integrating 24V power supply, ±10VDC control signal and full-travel LVDT spool feedback signal; double-shielded control cable required with single-point cabinet grounding, no digital fieldbus communication interface.

Core Functions

1.Patented ServoJet jet-pipe pilot delivers superior anti-contamination performance compared with traditional nozzle-flapper pilot, ensuring long-term stable continuous operation under moderately contaminated hydraulic fluid environment.

2.Zero-lap linear main spool supports seamless switching among position, speed and pressure three closed-loop control modes; onboard LVDT closed-loop dynamically compensates spool position drift caused by wide-range ambient temperature variation.

3.Spring-centered fail-safe neutral structure:main spool automatically returns to center upon power failure to lock A/B oil passage and fix hydraulic cylinder for equipment overload safety protection.

4.Factory fixed amplifier gain matched for low-medium flow variable-load working condition; ±10VDC analog input provides outstanding anti-interference capability for short and medium-distance wiring high-precision closed-loop regulation.

Typical Application

Small-medium tonnage precision hydraulic press servo cylinder control, miniature metal specimen tensile & fatigue test bench hydraulic system, small-size precision die-casting machine clamping control, precision composite material lab hot-forming hydraulic equipment.

Installation & Maintenance Instructions

1.Mount 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 ducts to avoid frequency converter harmonic interference on analog control signal; fasten valve with standard flat mounting washers during installation.

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

4.Seal all unused hydraulic ports with original blank plugs for spare part storage; preserve in dry dustproof warehouse to prevent NBR seal ageing and hydraulic fluid leakage.