MOOG D633-319C Direct Acting Servo Valve DDV 75 L/min Max Flow Rate 350 Bar
MOOG D633‑319C Direct Acting Servo Valve DDV 75 L/min Max Flow Rate
???? Product Overview
What it does MOOG D633‑319C belongs to D633 DDV (Direct‑Drive Valve) series, a single‑stage direct‑acting electro‑hydraulic servo valve with integrated closed‑loop spool position electronics. Driven by permanent‑magnet linear force motor, it receives analog control signals to precisely regulate hydraulic flow. It delivers high‑accuracy position, velocity, pressure and force closed‑loop control for hydraulic actuators. No pilot oil flow is required, lowering system contamination risk. Widely deployed on high‑performance industrial hydraulic machinery for accurate dynamic motion regulation.
✨ Product Advantages / Core Features
- ✅ Direct‑Drive DDV Structure: No pilot stage & no pilot oil supply needed, fewer failure points, better anti‑contamination performance than two‑stage pilot servo valves
- ✅ Linear Force‑Motor Bidirectional Drive: Active spool stroke in both directions; higher driving force vs common proportional solenoid valves
- ✅ Pressure‑Independent Dynamic Response: Stable dynamic performance regardless of working pressure fluctuation
- ✅ Integrated Closed‑loop Spool Feedback: Built‑in position transducer & SMD‑PWM drive electronics, no external controller required
- ✅ Spring‑Centered Fail‑safe Design: Spool returns to neutral position when power cuts off, stops actuator movement to avoid machinery runaway damage
- ✅ Low Power Consumption: Low electric current draw at hydraulic null and near‑null working point
- ✅ ISO 4401‑03 (NG6) Standard Mounting: Universal installation footprint, easy replacement and system retrofitting
- ✅ Full Global Certifications: CE, EMC compliant; optional ATEX explosion‑proof version for hazardous working zones
???? Technical Parameters
| Item | Specification |
|---|---|
| Model | D633‑319C |
| Series | D633 DDV Direct‑Acting Servo Valve |
| Drive Type | Permanent magnet linear force motor, single‑stage direct drive |
| Mounting Standard | ISO 4401‑03 (NG6) |
| Rated Flow | 40 L/min (@ Δp=35 bar per throttle edge) |
| Maximum Flow | 75 L/min (19.8 gpm) |
| Max Operating Pressure (P/A/B Port) | 350 bar (5000 psi) |
| Max Return Pressure (T‑port without Y‑port) | 50 bar |
| Max Return Pressure (T‑port with Y‑port) | 350 bar |
| Step Response (0‑100% stroke) | ≤12 ms |
| Frequency Response | 40‑60 Hz |
| Power Supply | 24 VDC (18‑32 VDC) |
| Control Input Signal | ±10 V, ±10 mA, 4‑20 mA |
| Hydraulic Fluid | Mineral‑based oil DIN 51524; water‑glycol, phosphate ester on request |
| Recommended Oil Viscosity | 15‑100 mm²/s (allowable 5‑400 mm²/s) |
| Ambient Temperature | ‑20 ℃ ~ +60 ℃ |
| Oil Working Temperature | ‑20 ℃ ~ +80 ℃ |
| Approx. Net Weight | 2.5 kg (5.5 lb) |
| Control Function | 3‑way / 4‑way / 2*2‑way throttle flow control |
| Standards | CE, EMC; ATEX optional |
???? Application Industries & Scenarios
Applicable Industries ????️ Hydraulic Press & Heavy‑Duty Forming Machinery ???? Die‑casting & Injection Molding Equipment ???? Wood & Particleboard Press Production Line ⚙️ Metallurgical Steel Processing Equipment ???? Material Fatigue Test Bench & Dynamic Test System ???? Off‑shore & Marine Hydraulic System ???? General Industrial High‑precision Automation
Typical Application Scenarios
- Hydraulic cylinder closed‑loop position, speed and force control
- Material mechanical performance dynamic fatigue test rig
- Wood composite particle board continuous pressing production line
- Die‑casting / injection molding machine precise clamping & injection control
- Steel mill gap adjustment, heavy‑load industrial hydraulic station
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.