Model Definition

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

6372E = Spool/sleeve assembly; rated flow 75 L/min @ ΔP=35 bar (high‑response linear trim, with LVDT feedback, enhanced null stability)

Typical full config example: G075HOGBENO9

G075 = 75 L/min rated flow & high frequency response

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

E = 6+PE connector, IP65

N = NBR seals, wide temperature range

O9 = High‑response ServoJet® pilot stage

Technical Specifications

Hydraulic Parameters

Rated flow: 75 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: 9–14 ms (0→100%, 210 bar)Moog Inc.

Hysteresis: <0.10%

Resolution: <0.05%

Null drift: <1.2% (ΔT=55 K, with LVDT compensation)

Null leakage: <15 mL/min

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

Electrical Parameters

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

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

Feedback signal: LVDT (4–20 mA spool position)Moog Inc.

Connector: 6+PE, IP65Moog Inc.

Current draw: ≤800 mA

Physical & Environmental

Operating temperature: −40 ℃ to +85 ℃

Weight: approx. 5.5 kg

Interface & Communication Configuration

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

Electrical interface:

Power: 24 VDC, GND, PE

Command: ±10 V / ±10 mA

Feedback: 4–20 mA (LVDT position)

Status: Fault alarm output

Core Functions

High‑Response ServoJet® Pilot: Optimized for 75 L/min, fast dynamic response, excellent dirt tolerance

Integrated PID Amplifier: Onboard dead‑zone compensation, thermal/overload protection, LVDT‑based null stabilization

Closed‑Loop Precision Control: LVDT feedback ensures high linearity, repeatability, and position accuracy

Fail‑Safe Centering: Spool returns to neutral on power loss

75 L/min High‑Flow Dynamics: Tuned for medium‑to‑large systems requiring high speed and accuracy

Application Scenarios

Industrial automation: Heavy‑duty CNC machines, large hydraulic presses, high‑force injection molding equipment

Test equipment: Structural fatigue testers, high‑load vibration tables, actuator test benches

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

Energy: Wind turbine pitch control, marine heavy‑duty auxiliary hydraulics

Usage & Maintenance

Installation: Horizontal/vertical mounting; minimize vibration

Fluid: ISO VG46 mineral oil; maintain NAS 1638 Class 6 cleanliness

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

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