進口*止回閥(德國OLES奧萊斯閥門)

【進口*止回閥】詳細說明：

可達快速關(guān)閉，防治巨大水擊聲，形成*效果。該閥主要適用于給排水，消防暖通系統(tǒng)，可安裝于水泵出水口處，以防止倒流及水錘對泵的損害。在沒有介質(zhì)流過閥體時，閥瓣在彈簧力的作用下總處于關(guān)閉狀態(tài)，閥瓣的開啟、關(guān)閉及開啟度大小主要取決于進出口端壓力差，如果進口端壓力大于出口端與彈簧的總和時。

Quick shutdown can be achieved to prevent huge water hammer sound and form a silent effect. The valve is mainly suitable for water supply and drainage, fire fighting and heating systems. It can be installed at the outlet of the pump to prevent backflow and water hammer damage to the pump. When there is no medium flowing through the valve body, the valve disc is always closed under the action of spring force. The opening, closing and opening degree of the valve disc mainly depends on the pressure difference between the inlet and outlet ends, if the pressure at the inlet end is greater than the total time of the outlet end and the spring.

【進口*止回閥】特點

在沒有介質(zhì)流過閥體時，閥瓣在彈簧力的作用下總處于關(guān)閉狀態(tài)，閥瓣的開啟、關(guān)閉及開啟度大小主要取決于進出口端壓力差，如果進口端壓力大于出口端與彈簧的總和時，閥瓣開啟，只要有壓力差，閥瓣一直處于開啟狀態(tài)，同時壓力差的大小決定閥瓣開啟度大??；如果出口端壓力與彈簧力總和大于進口端時，閥瓣一直處于關(guān)閉狀態(tài)，由于閥瓣的開啟關(guān)閉是處于一個動態(tài)的力平衡系統(tǒng)中，不管進口端的介質(zhì)變化如何，此閥運行平衡，且無噪音，安全故障少。

1、閥體內(nèi)部水流通路采用流線型設(shè)計，水頭損失小

2、合理、密封性好、耐磨損、使用壽命長

3、有導(dǎo)向裝置，關(guān)閉靈活，且閥瓣關(guān)閉行程短

When there is no medium flowing through the valve body, the valve disc is always closed under the action of spring force. The opening, closing and opening degree of the valve disc mainly depends on the pressure difference between the inlet and outlet ends. If the pressure at the inlet end is greater than the sum of the outlet end and the spring, the valve disc opens. As long as there is a pressure difference, the valve disc is always open. At the same time, the magnitude of pressure difference determines the opening degree of the disc; if the total pressure and spring force at the outlet end are greater than that at the inlet end, the disc will always be closed, because the opening and closing of the disc is in a dynamic force balance system, regardless of the change of the medium at the inlet end, the valve operates in a balanced and noise-free manner. Less total failures.

1. The flow path inside the valve body adopts streamlined design, and the head loss is small.

2. Reasonable, good sealing, wear resistance and long service life

3. Guiding device, flexible closure, and short disc closing stroke, can

【進口*止回閥】結(jié)構(gòu)說明：

1、消聲止回閥的閥瓣呈圓盤狀，繞閥座通道的轉(zhuǎn)軸作旋轉(zhuǎn)運動，因閥內(nèi)通道成流線形，流動阻力比升蝶式止回閥小，適用于低流速和流動不常變化的大口徑場合，但不宜用于脈動流，其密封性能不及升降式。蝶式止回閥分單瓣式、雙瓣式和多半式三種，這三種形式主要按閥門口徑來分，目的是為了防止介質(zhì)停止流動或倒流時，減弱水力沖擊。

2、消聲止回閥：閥瓣沿著閥體垂直中心線滑動的止回閥，消聲止回閥只能安裝在水平管道上，在高壓小口徑止回閥上閥

 瓣可采用圓球。消聲止回閥的閥體形狀與截止閥一樣（可與截止閥通用），因此它的流體阻力系數(shù)較大。其結(jié)構(gòu)與截止閥相似，閥體和閥瓣與截止閥相同。閥瓣上部和閥蓋下部加工有導(dǎo)向套簡，閥瓣導(dǎo)向簡可在閥盞導(dǎo)向簡內(nèi)自由升降，當(dāng)介質(zhì)順流時，閥瓣靠介質(zhì)推力開啟，當(dāng)介質(zhì)停流時，閥瓣靠自垂降落在閥座上，起阻止介質(zhì)逆流作用。直通式蝶式止回閥介質(zhì)進出口通道方向與閥座通道方向垂直；立式升降式止回閥，其介質(zhì)進出口通道方向與閥座通道方向相同，其流動阻力較直通式小。

3、消聲止回閥：閥瓣圍繞閥座內(nèi)的銷軸旋轉(zhuǎn)的止回閥。碟式止回閥結(jié)構(gòu)簡單，只能安裝在水平管道上，密封性較好。

4、消聲止回閥：閥瓣沿著閥體中心線滑動的閥門。管道式止回閥是新出現(xiàn)的一種閥門，它的體積小，重量較輕，加工工藝性好，是止回閥發(fā)展方向之一。但流體阻力系數(shù)比旋啟式止回閥略大。

5、壓緊式止回閥：這種閥門是做為鍋爐給水和蒸汽切斷用閥，它具有升降式止回閥和截止閥或角閥的綜合機能。

　　此外，還有—些不適用于泵出口安裝的止回閥，如底閥、彈簧式，Y型等止回閥。