Model Definition

D661 = Series (integrated 24 VDC electronics, NG10 mounting)

8006 = Spool/sleeve assembly; rated flow 120 L/min @ ΔP=35 bar (high‑flow linear trim, no LVDT, standard null, 8006‑code configuration)

Typical full config example: G120HOAA6VSM2OA

G120 = 120 L/min rated flow & high flow capacity

HOAA = Standard hydraulic layout, 24 VDC, ±10 V/±10 mA command, centered null

6 = 6+PE connector, IP65

VSM2 = NBR seals, wide temperature range, standard pilot

OA = Fail‑safe centering, no LVDT

Technical Specifications

Hydraulic Parameters

Rated flow: 120 L/min (ΔP=35 bar)

Max working pressure: 350 bar (P/A/B); 210 bar (internal drain T) / 350 bar (external drain T)Moog Inc.

Step response: 10–14 ms (0→100%, 210 bar)

Hysteresis: <0.15%

Resolution: <0.05%

Null drift: <1.5% (ΔT=55 K)

Null leakage: <15 mL/min

Fluid cleanliness: NAS 1638 Class 6 / ISO 4406 18/15Moog Inc.

Electrical Parameters

Power supply: 24 VDC (18–32 VDC)Moog Inc.

Control signal: ±10 V (differential) or ±10 mAMoog Inc.

Feedback: No LVDT (open‑loop spool position control)

Connector: 6+PE, IP65Moog Inc.

Current draw: ≤700 mAMoog Inc.

Physical & Environmental

Operating temperature: −40 ℃ to +85 ℃

Weight: approx. 5.7 kg

Interface & Communication Configuration

Hydraulic interface: P/A/B/T, ISO 4401‑05 (NG10)

Electrical interface:

Power: 24 VDC, GND, PEMoog Inc.

Command: ±10 V / ±10 mAMoog Inc.

Status: Fault alarm output

Core Functions

High‑Flow ServoJet® Pilot: Optimized for 120 L/min, fast dynamic response, excellent dirt toleranceMoog Inc.

Integrated PID Amplifier: Onboard dead‑zone compensation, thermal/overload protection, stable nullMoog Inc.

Open‑Loop Precision Control: High linearity and repeatability without LVDT feedback穆格中国

Fail‑Safe Centering: Spool returns to neutral on power lossMoog Inc.

120 L/min High‑Flow Dynamics: Tuned for systems requiring high flow and moderate response

Application Scenarios

Industrial automation: Large CNC machines, heavy‑duty hydraulic presses, large injection molding equipment

Test equipment: Large structural fatigue testers, high‑force vibration tables, large actuator test benches

Metallurgy: High‑force tension control, heavy‑duty AGC roll gap control

Energy: Large wind turbine pitch control, marine main hydraulics

Usage & Maintenance

Installation: Horizontal/vertical mounting; minimize vibration

Fluid: ISO VG46 mineral oil; maintain NAS 1638 Class 6 cleanlinessMoog Inc.

Commissioning: Apply 24 VDC; connect ±10 V/±10 mA command; calibrate zero/gain

Maintenance: Check contamination every 3 months; calibrate every 6 months; avoid long idle periods at high pressure