Model Code Definition

D662 = NG16 ISO4401-07 installation size, ServoJet jet-pipe pilot construction, internal embedded electronic amplifier base series

Z4310 = Unique factory trim code including rated flow calibration, preset null bias, revised internal pilot component specification and fixed amplifier gain parameter

K = Special factory modified version: optimized internal flow passage & enhanced low-temperature anti-drift adjustment, customized for high-load fluctuating pressure working condition

Technical Specifications

Hydraulic Parameters

Rated Flow: 262 L/min @35bar single edge differential pressure; peak 442 L/min under 70bar supply differential pressure

Max Working Pressure: P/A/B main control ports 350bar; built-in T internal drain ≤50bar; separated Y external drain up to 350barMoog Inc.

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

Control Accuracy: Hysteresis＜0.17%FS, Resolution＜0.07%FS, full-range temperature drift (-20℃~+55℃)＜2.05%FS

Null Leakage: 0.48~3.02 L/min

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

Net Weight: 3.78kg

Electrical Parameters

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

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

EMC Compliance: Conforms to EN55011 industrial EMC standard; 7-pin military circular connector with IP65 protection after cable assemblyMoog Inc.

Port & Connection Configuration

Hydraulic Interface: Standard ISO4401-07 NG16 bolt layout; P supply port, internal T drain port, 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-range LVDT feedback wiring; double-shielded control cable with single-point grounding at control cabinet terminal

Control Mode: Pure analog closed-loop control, no built-in digital fieldbus communication interface

Core Functions

Patented ServoJet jet-pipe pilot features superior anti-pollution performance compared with conventional nozzle-flapper pilot, ensuring stable long-running operation under slightly contaminated hydraulic oil for harsh heavy-industry environment.

Full-spool LVDT closed-loop matching with internal amplifier automatically compensates temperature-caused null drift; K-version optimized circuit improves low-temperature stability under wide ambient temperature fluctuation.

Factory preset spring-centered fail-safe spool: spool returns to middle position automatically when power cuts off to lock A/B oil cavities and fix load position for mechanical safety protection.

Optimized internal runner keeps linear flow gain, supports flexible switching of position, speed and pressure closed-loop control on single valve body.

Typical Application

Large hot forging hydraulic press, heavy automotive stamping production line, wide-width steel strip mill tension control system, hydraulic component fatigue test bench, aerospace composite hot-press molding machine, large precision die-casting clamping hydraulic system.

Installation & Maintenance Instructions

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

Separate high-power power cable and shielded control wire inside different wiring ducts to avoid frequency converter harmonic interference to analog control signal.

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

Seal all hydraulic ports with dedicated blocking plugs during long-term spare storage; store inside dry dustproof warehouse to prevent FKM fluororubber seal aging and hydraulic fluid leakage.