Model Code Definition

D662 = NG16 ISO4401-07 installation dimension, ServoJet jet-pipe pilot construction, onboard integrated electronic amplifier base series

P01 = Spool specification, O-type closed center configuration with spring return upon power loss for fail-safe load holding

JA = Seal & medium option: A=FKM fluorocarbon seal; J matches standard mineral hydraulic oil application

M = Standard internal drain layout (internal T drain + separate external Y drain port)

F6 = Connector definition: 7-pin military circular electrical receptacle

VS = Control signal: ±10VDC differential analog input + built-in full-travel LVDT spool feedback

X2 = Custom internal pilot component revision version

-A = Factory official assembly batch code

Technical Specifications

Hydraulic Parameters

Rated Flow: 225 L/min @35bar single land differential pressure; maximum 402 L/min under 70bar supply differential pressure

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

Dynamic Response: Full stroke 0~100% step response ≤28.3ms at 210bar supply pressure

Control Accuracy: Hysteresis＜0.19%FS, Resolution＜0.09%FS, total thermal drift (-20℃~+55℃)＜2.35%FS

Null Leakage: 0.60~3.40 L/min

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

Net Weight: 3.80kg

Electrical Parameters

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

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

EMC Compliance: Complies with EN55011 industrial EMC standard, connector IP65 protection grade

Port & Connection Configuration

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

Electrical Interface: 7-pin military circular receptacle integrating power supply, analog control 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 digital fieldbus communication interface

Core Functions

Patented ServoJet jet-pipe pilot delivers superior anti-contamination capability compared with conventional nozzle-flapper pilot, ensuring long-term stable operation under moderately contaminated hydraulic fluid in harsh industrial environments.

Embedded LVDT full-spool closed-loop together with onboard amplifier automatically compensates temperature-induced null drift, supporting uninterrupted 24-hour full-load continuous operation.

P01 O-center fail-safe spool design: spool springs back to neutral position once power fails to lock A/B oil chambers and fix workpiece position to meet equipment safety requirement.

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

Typical Application

Medium-large tonnage hot forging press, automotive stamping forming equipment, medium-width strip mill tension control, multi-channel hydraulic fatigue test bench, precision injection molding clamping system, composite material hot-press molding machine.

Installation & Maintenance Instructions

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

Separate power cables and shielded control wires inside independent wiring ducts to avoid inverter harmonic interference on analog control signals.

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

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