BOSCHREXROTH供貨商/原裝力士樂(lè)減壓閥
REXROTH力士樂(lè)減壓閥——該閥門(mén)的減壓比必須在一定程度上高于系統(tǒng)值； 即使在zui大或者zui小流量時(shí)它也應(yīng)該能夠?qū)φ饔没蛘叻醋饔每刂菩盘?hào)做出響應(yīng)。這些閥門(mén)應(yīng)該針對(duì)有用控制范圍選擇，即zui大流量的20%到80%。正常為等比型或者具有等比特性。這些類型的閥門(mén)本身具有比例控制所要求的*流量特性及流量范圍。 減壓閥的種類很多，常見(jiàn)的有：先導(dǎo)活塞式減壓閥、薄膜式減壓閥、波紋管式減壓閥、比例式減壓閥、自力式減壓閥、直接作用活塞式減壓閥、背壓調(diào)節(jié)閥等等。它們分別適用于不同的工作介質(zhì)。REXROTH力士樂(lè)減壓閥是一種自動(dòng)降低管路工作壓力的專門(mén)裝置，它可將閥前管路較高的水壓減少至閥后管路所需的水平。減壓閥廣泛用于高層建筑、城市給水管網(wǎng)水壓過(guò)高的區(qū)域、礦井及其他場(chǎng)合，以保證給水系統(tǒng)中各用水點(diǎn)獲得適當(dāng)?shù)姆?wù)水壓和流量。鑒于水的漏失率和浪費(fèi)程度幾乎同給水系統(tǒng)的水壓大小成正比，因此減壓閥具有改善系統(tǒng)運(yùn)行工況和潛在節(jié)水作用，據(jù)統(tǒng)計(jì)其節(jié)水效果約為30％。
REXROTH力士樂(lè)減壓閥的基本作用原理是靠閥內(nèi)流道對(duì)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(cè)的進(jìn)出口水壓差自動(dòng)調(diào)節(jié)。近年來(lái)又出現(xiàn)一些新型減壓閥，如固定比例式減壓閥，定比減壓原理是利用閥體中浮動(dòng)活塞的水壓比控制，進(jìn)出口端減壓比與進(jìn)出口側(cè)活塞面積比成反比。REXROTH力士樂(lè)減壓閥是采用控制閥體內(nèi)的啟閉件的開(kāi)度來(lái)調(diào)節(jié)介質(zhì)的流量,減壓閥將介質(zhì)的壓力降低,減壓閥同時(shí)借助閥后壓力的作用調(diào)節(jié)啟閉件的開(kāi)度,減壓閥使閥后壓力保持在一定范圍內(nèi),減壓閥并在閥體內(nèi)或閥后噴入冷卻水,減壓閥將介質(zhì)的溫度降低,減壓閥這種閥門(mén)稱為減壓減溫閥。減壓閥該閥的特點(diǎn)是在進(jìn)口壓力不斷變化的情況下,減壓閥保持出口聽(tīng)壓力和溫度值在一定的范圍內(nèi)。
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