加工精度比例閥結構相對簡單，同時考慮到加工成本問題,加工精度要求較低。一般為10μ級,而且調節閥一般沒有閥套,且其零位死區和滯環大、頻響較低，比較適合用在控制精度不高的開環控制工業場合。伺服閥一般加工精度為μ級,采用閥芯、閥套、閥體的配合方式,閥芯和閥套為單配,間隙為2～4μm。閥芯和閥套窗口之間采用氣動配磨或液壓配磨方式,無死區,滯環小,頻響高電磁比例換向閥 4WRA(E)...22...系列
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