Moog D633-313B Hydraulic Servo Valve
Product Details of Moog D633-313B
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A high-performance hydraulic servo (proportional) valve used for precise flow control in hydraulic systems.
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Designed for applications requiring accurate control of position, velocity, force or flow — e.g. industrial actuators, test machines, presses, or heavy machinery.
Design & Technology:
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Part of the D633 (and D634) series of direct-drive valves: uses a permanent-magnet linear force motor to directly actuate the spool. This eliminates the need for pilot oil and ensures pressure-independent dynamic performance.
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Integrated closed-loop spool position control, with built-in electronics (typically SMD + PWM current-drive stage).
| Parameter | Value / Range |
|---|---|
| Rated Flow (Δp = 35 bar, per land) | up to 40 l/min (≈ 10.6 gpm) |
| Maximum Flow | 75 l/min (≈ 19.8 gpm) |
| Maximum Operating Pressure (P, A, B ports) | 350 bar (≈ 5,000 psi) |
| Control Signal (Electrical Input) | ±10 V, ±10 mA, or 4–20 mA analog options |
| Supply Voltage | 24 VₙDC (range: 18–32 V DC) |
| Response Time (0 → 100% step) | ~12 ms (for D633 series) |