Direct Acting High-Speed Servo Valve

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Hydraulics & Pneumatics

Direct Acting High-Speed Servo Valve
Direct Acting High-Speed Servo Valve

Santest offers the new DA Series of "High Speed Servo Valves" for hydraulic and pneumatic applications, employing "Dual Halbach Magnet Array" which reinforces magnetic tandem. As a result, the higher response and surpassing anti-contamination characteristics can be obtained.

Dual Halbach Magnet Array

A voice coil of tandem differential configuration is inserted in the annular space of "Dual Halbach Magnet Array" and a spool is so fixed at the end of coil that it may move axially and freely together. When current is supplied in intensified magnetic fields, the voice coil itself generates strong thrust force and moves together with spool in an axial direction.

Detecting magnets

Also, detecting magnets are installed at the other end of spool in such a way that Hall element may detect positional signal and sending coil may directly detect velocity signal of the spool. Therefore, a very stable feedback system can be achived.

Dynamic characteristics

  • Step response: 1.5msec (0 ⇔ 100%)
  • Frequency responce
  • Gain -3dB: 630Hz (command signal: ±25%)
  • Phase -90°: 490Hz (command signal: ±25%)
  • Contamination Level: NAS1638 Class 10
Posted on May 1, 2021 - (137 views)
Santest Co., Ltd.
51-2 Shimaya 4-Chome Konohana-ku
554-8691 Osaka - Japan
+81-6-64655561
+81-6-64655921
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Description

Santest is the leading global importer and exporter of industrial equipment parts of Japanese origin, such as rubber transmission belts, ball bearings, generators, oil seals and is also the developer and manufacturer of mechatronic instruments such as transducers, electro-hydraulic systems. Through advancing the state-of-the-art contributions while maintaining extraordinarily high quality standards, Santest has dedicated its efforts towards optimizing the performance of magnetostrictive displacement transducers to facilitate their successful use in cases where incremental encoders can be replaced by these absolute transducers. Improvements in R&D, manufacturing and reliable delivery have elevated accuracy standards so that new applications are occurring daily in detection systems for advanced industrial applications and specialized machinery.

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