Model Code Definition

D662 = Core series: NG16 ISO4401-07 mounting dimension, ServoJet jet-pipe pilot structure, onboard integrated electronic amplifier

Z4336 = Exclusive factory trim code for fixed rated flow, preset null bias, customized pilot component specification and locked amplifier gain setting

K = Low-temperature upgraded revision: optimized internal oil gallery and anti-drift control circuit to reduce thermal null shift under extreme high/low ambient temperature

Technical Specifications

Hydraulic Parameters

Rated Flow: 315 L/min @35bar single orifice differential pressure; peak flow 510 L/min under 70bar supply differential pressure

Max Working Pressure: P/A/B main ports 350bar; built-in T internal drain ≤50bar; standalone Y external drain withstand full 350barMoog Inc.

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

Control Precision: Hysteresis＜0.18%FS, Resolution＜0.07%FS, total thermal drift (-20℃~+55℃)＜2.1%FS

Null Leakage: 0.52~3.2 L/min

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

Net Weight: 3.82kg

Electrical Parameters

Power Supply: 24VDC wide range input (18~32VDC), static standby current ≤700mA

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

EMC Standard: Compliant with EN55011 industrial EMC specification; 7-pin military circular connector, IP65 protection after cable terminationMoog Inc.

Port & Connection Configuration

Hydraulic Interface: Standard ISO4401-07 NG16 mounting hole layout, P supply port, A/B actuator control ports, internal T drain port, separate Y external drain port

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

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

Core Functions

Patented ServoJet jet-pipe pilot delivers superior anti-pollution capability vs conventional nozzle-flapper pilot, ensuring steady continuous operation under moderately contaminated hydraulic fluid in harsh workshop environment.

Onboard amplifier cooperates with full-travel LVDT closed-loop to automatically compensate temperature-induced null offset; K optimized circuit greatly improves stability under wide temperature swing.

Spring-centered fail-safe spool design: spool mechanically returns to middle position upon power loss to lock A/B oil chambers and fix load position for equipment safety protection.

Refined internal flow channel maintains stable linear flow gain, supporting flexible switching between position, speed and pressure closed-loop control modes.

Typical Application

Heavy-duty hot forging hydraulic press, automotive large panel stamping production line, steel strip mill tension control system, high-load material fatigue test bench, aerospace composite hot-pressing forming equipment, large tonnage die-casting clamping hydraulic system.

Installation & Maintenance Instructions

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

Separate power cable and shielded control wire in independent wiring troughs to avoid frequency converter harmonic interference to analog control signal.

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

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