DR20-4-4X/200Y庫存力士樂減壓閥

武穴黎翔機電設備有限公司：18934630908?

?減壓閥的構造類型很多，以往常見的有薄膜式、內彈簧活塞式等

。減壓閥的基本作用原理是靠閥內流道對水流的局部阻力降低水壓，水壓降

的范圍由連接閥瓣的薄膜或活塞兩側的進出口水壓差自動調節。近年來又出

現一些減壓閥，如定比式減壓閥，其構造原理如圖14．2－2所示。定

比減壓原理是利用閥體中浮動活塞的水壓比控制，進出口端減壓比與進出口

側活塞面積比成反比。這種減壓閥工作平穩無振動；閥體內無彈簧，故無彈

簧銹蝕、金屬疲勞失效之慮；密封性能良好不滲漏，因而既減動壓（水流動

時）又減靜壓（流量為0時）；特別是在減壓的同時不影響水流量

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