Model Code Definition

D662 = NG16 ISO4401-07 mounting, ServoJet jet-pipe pilot design, onboard integrated electronic amplifier series

4337 = flow specification coding: rated flow 290 L/min @ ΔP=35bar per single metering land, internal T return + standalone external Y drain structure

K = factory custom null & gain trim for modified flow characteristic

P02 = fail-safe spool specification: center closed O-type spool, spring centering upon power loss to lock actuator ports

HAM = seal & fluid rating: A=FKM fluorocarbon seal, M=standard mineral hydraulic oil application, medium temp -20℃~+80℃

F6 = electrical pin definition: 7-pin round military circular connector

VS = control signal standard: ±10VDC differential analog input, built-in full-range LVDT spool feedback

X2 = customized internal pilot component revision; -A = factory final assembly batch marking

Technical Specifications

Hydraulic Parameters

Rated Flow: 290 L/min @35bar single land pressure drop; maximum approximate 505 L/min under 70bar differential supply pressure

Max Working Pressure: P/A/B main ports 350bar; internal T drain ≤50bar; independent Y external drain port rated 350bar

Dynamic Response: Full 0~100% step response ≤27ms at 210bar supply pressure

Control Accuracy: Hysteresis＜0.2%FS, Resolution＜0.1%FS, total thermal drift (-20℃~+55℃)＜2.35%FS

Null Leakage: 0.55~3.1 L/min

Fluid Requirement: Anti-wear mineral hydraulic oil, cleanliness NAS6~7 / ISO4406 17/14/11

Net Weight: 3.73kg

Electrical Parameters

Power Supply: 24VDC wide input (18~32VDC), static operating current ≤675mA

Command Signal: Standard ±10VDC differential analog input; optional ±10mA /4~20mA current signal per customization

EMC Standard: Compliant with EN55011 industrial EMC regulation; connector protection grade IP65

Port & Connection Configuration

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

Electrical Interface: 7-pin military round receptacle integrating power supply, analog control signal and LVDT feedback wiring; double-shielded control cable with single-point cabinet grounding

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

Core Functions

Patented ServoJet jet-pipe pilot structure delivers outstanding anti-pollution capability versus conventional nozzle-flapper pilot, ensuring long-term stable operation under moderately contaminated hydraulic oil in harsh industrial environments穆格中国.

Embedded full-spool LVDT closed-loop plus onboard amplifier automatically compensates ambient-temperature-induced null drift, supporting uninterrupted 24/7 full-load running.

P02 O-center fail-safe spool design: springs back to neutral position when power cuts off to seal A/B cavities and hold load position, meeting equipment safety shutdown requirement.

Optimized internal flow passage ensures linear flow gain, supporting flexible switching among position, velocity and pressure closed-loop control modes on single valve unit.

Typical Application

Medium-tonnage hot forging hydraulic press, automotive stamping & forming equipment, metal strip rolling mill tension control, multi-specimen hydraulic fatigue test bench, large precision injection molding clamping system, carbon fiber composite hot-press molding machine.

Installation & Maintenance Instructions

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

Route power cable and shielded control wire inside separated cable ducts to eliminate frequency converter harmonic interference on analog control signals.

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

Block all hydraulic ports tightly with sealing plugs during long-term spare storage; store inside dry dustproof warehouse to prevent rubber seal aging and oil leakage.