| D663 Series Hydraulic Pumps Servo Valve |
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| Direct‑drive electro‑hydraulic servo valve for high‑precision closed‑loop motion control | |
| High dynamic response, short step response time for high‑accuracy position & force control | |
| Low internal friction design, minimal hysteresis and superior repeatability | |
| Integrated torque motor drive structure, compact valve body layout | |
| Good anti‑pollution performance, compatible with industrial clean hydraulic oil | |
| High flow stability under varying load pressure conditions | |
| Suited for test bench, material testing machine, metallurgical and precision press equipment |
D663 Series Hydraulic Pumps Servo Valve Data Sheet
About us:
Ningbo Lainuo Hydraulic Technology Co., Ltd. focuses on the core sector of hydraulic transmission, integrating R&D, manufacturing, and sales. We specialize in axial piston pumps, hydraulic oil pumps, hydraulic motors, hydraulic valves, and hydraulic components. We provide customized product development and system integration recommendations based on our customers' specific operating conditions. Our hydraulic components are suitable for construction machinery, agricultural machinery, mining machinery, mobile machinery, and complete sets of metallurgical machinery. We are committed to strict quality control, uphold integrity in business operations, and leverage our professional technical expertise to provide customers with hassle-free and efficient hydraulic procurement services.
D663 Series Hydraulic Pumps Servo Valve Working Principle:
1.Pilot‑free direct‑drive structure: Adopts high‑output linear force motor to actuate spool directly, removes pilot oil supply requirement, simplifies system oil circuit layout and cuts potential pilot‑stage failure risks
2.In‑built LVDT spool closed‑loop feedback: Real‑time spool position monitoring delivers ultra‑low hysteresis and fine resolution, stable dynamic performance regardless of system pressure fluctuation.
3.Safe spring‑centered fail‑safe logic: Spool automatically returns to neutral position upon power loss or signal interruption, prevents uncontrolled actuator runaway for enhanced equipment operational safety
4.Integrated onboard drive electronics: 24VDC power supply, supports standard analog command signals, features electric zero‑point adjustment, reduces external auxiliary amplifier and wiring workload on site.
5.High driving force & good contamination resistance: Strong spool driving capacity tolerates moderate oil‑borne particle pollution, less vulnerable to clogging compared with traditional two‑stage nozzle‑flapper servo valves.
6.ISO‑standard mounting interface: Follows ISO4401 installation dimension, easy manifold stacking assembly; spool position monitoring signal output facilitates system status diagnosis and fault troubleshooting
7.Rigorous multi‑dimensional performance calibration: Every unit completes dynamic response, hysteresis and null drift testing before delivery to guarantee consistent high‑precision control capacity.
D663 Series Hydraulic Pumps Servo Valve Application Example :
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Integrated closed‑loop spool position feedback for ultra‑precise flow control
Permanent magnet linear force motor direct drive eliminates pilot oil supply requirement
Pressure‑independent dynamic response ensures stable performance under varying system pressure
Low hysteresis and low threshold deliver high‑resolution motion control
Spring‑centered spool returns to neutral position upon power loss for machine safety
Built‑in drive electronics accepts standard analog control signal
ISO 4401‑03 standard mounting pattern supports quick on‑site replacement
D663 Series Hydraulic Pumps Servo Valve Model:
D633‑7445
D633‑7447
D633‑7341
D633‑7242
D634‑501A
D633‑7446‑A04KO4M0VNJ
D633‑7446‑S
D633‑7446‑V
D633‑7102
D633‑7203
