Model Code Definition

D662 = NG16 ISO4401-07 mounting dimension, ServoJet jet-pipe pilot construction, onboard integrated drive electronics product series

4724 = performance specification code, rated flow 135 L/min @ ΔP=35bar per single metering land, separated internal T return oil & standalone Y external drain structure with factory preset null offset and flow gain parameters.

Technical Specifications

Hydraulic Parameters

Rated Flow: 135 L/min @35bar single land differential pressure; max 246 L/min under 70bar supply differential pressure

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

Dynamic Response: Full stroke 0~100% step response ≤26.5ms at 210bar supply pressure

Control Precision: Hysteresis＜0.18%FS, Resolution＜0.1%FS, total thermal drift (-20℃~+55℃)＜2.2%FS

Null Leakage: 0.52~3.0 L/min

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

Net Weight: 3.66kg

Electrical Parameters

Power Input: 24VDC wide voltage range (18~32VDC), static operating current ≤640mA

Standard Control Command: ±10VDC differential analog input; optional ±10mA /4~20mA current signal available for customized order

EMC Standard: Complies with EN55011 industrial electromagnetic compatibility standard, electrical circular connector with IP65 ingress protection grade穆格中国

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 command 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 design delivers superior anti-contamination capability compared to conventional nozzle-flapper pilot, enabling stable long-running operation under slightly contaminated hydraulic fluid in harsh industrial working conditions穆格中国.

Built-in drive amplifier paired with full-spool LVDT closed-loop automatically compensates temperature-induced null drift, supporting nonstop 24-hour full-load continuous operation.

Standard spring-centered neutral spool construction: spool returns to middle position upon power failure to lock A/B oil chambers and fix load position to satisfy equipment fail-safe protection requirement.

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

Typical Application

Medium tonnage hot forging hydraulic press, medium-size automotive stamping production line, steel strip mill tension control system, hydraulic multi-channel fatigue test bench, precision medium-spec injection molding clamping unit, composite material hot forming hydraulic equipment.

Installation & Maintenance Instructions

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

Route high-current power cables and shielded control wires inside separated wiring ducts to avoid harmonic interference from frequency converters to analog control signals.

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

Block all hydraulic ports with dedicated blank plugs during long-term spare part storage; store within dry dustproof warehouse to prevent rubber seal aging and oil leakage.