?T6C?022?3L01?B1

武穴黎翔機電設(shè)備有限公司，詢價聯(lián)系人：何女士

詢價電話：0713-6542758，手機：18934630908????

詢價傳真：0713-6542758

詢價QQ:?736567721,704552157

現(xiàn)貨特價型號：R900925687?4WRAE10W1-30-22/G24N9K31/F1V??2臺

0811402141?DBETBEX-1X/315G24K31F1M?????2臺

D634-371C?R24K02MONSS2????3臺

DG4V-3-6C-M-U-H7-60????10臺

DG4V-3-2N-M-U-H7-60????15臺

隙下節(jié)流。1、構(gòu)造較簡單，便于制造和維修，成本低。?2、調(diào)節(jié)精度不高，不能作調(diào)節(jié)使用。

3、密封面易沖蝕，不能作切斷介質(zhì)用。

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4、密封性較差節(jié)流閥按通道方式可分為直通式和角式兩種；按啟閉件的形狀分，有針形、溝形和窗形三種。

可調(diào)節(jié)節(jié)流閥：閥針和閥芯采用硬質(zhì)合金制造，產(chǎn)品按API6A標準設(shè)計，具有耐磨、耐沖刷性能。主要用于井口采油（氣）樹設(shè)備,

滑套式節(jié)流閥：閥芯采用低噪音平衡型結(jié)構(gòu)，開啟輕便，產(chǎn)品按API6A標準設(shè)計，閥芯表面覆蓋碳化鎢，適合于有閃蒸、高壓差，高壓力，空化等條件苛刻的場合，使用壽命長，流量調(diào)節(jié)精度大大提高。適用于石油，天然氣，化工，煉油，水電等行業(yè)。

節(jié)流閥的安裝與維護應(yīng)注意以下事項：

該閥經(jīng)常需要操作，因此應(yīng)安裝在易于方便操作的位置上。

安裝時要注意介質(zhì)方向與閥體所標箭頭方向保持一致。

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電位差，故極化分子被吸附到縫隙表面，形成牢固的邊界吸附層，吸附層厚度一般為5~8微米，因而影響了節(jié)流縫隙的大小。以上堆積、吸附物增長到一定厚度時，會被液流沖刷掉，隨后又重新附在閥口上。這樣周而復始，就形成了流量的脈動。

3、閥口壓差較大時，因閥口溫度高，液體受擠壓的程度增強，金屬表面也更易受摩擦作用而形成電位差，因此壓差大時容易產(chǎn)生堵塞現(xiàn)象。由于節(jié)流閥的流量不僅取決于節(jié)流口面積的大小，還與節(jié)流口前后的壓差有關(guān)，閥的剛度小，故只適用于執(zhí)行元件負載變化很小且速度穩(wěn)定性要求不高的場合。

對于執(zhí)行元件負載變化大及對速度穩(wěn)定性要求高的節(jié)流調(diào)速系統(tǒng)，必須對節(jié)流閥進行壓力補償來保持節(jié)流閥前后壓差不變，從而達到流量穩(wěn)定?？煞譃槭謩訐Q向閥、電磁換向閥、電液換向閥等。

又稱克里斯閥，閥門的一種，具有多向可調(diào)的通道，可適時改變流體流向。

工作時借著閥外的驅(qū)動傳動機構(gòu)轉(zhuǎn)動驅(qū)動軸，帶動搖拐臂，啟動閥板，使工作流體時而從左入口通向閥的下部出口，時而從右入口變換通向下部出口，實現(xiàn)了周期變換流向的目的。

這種變換閥在石油、化工生產(chǎn)中有著廣泛的應(yīng)用，在合成氨造氣系統(tǒng)中最為常用。此外，換向閥還可作成閥瓣式的結(jié)構(gòu)，多用于較小流量的場合。工作時只需轉(zhuǎn)動手輪通過閥瓣來變換工作流體的流向。六通換向閥主要由閥體、密封組件、凸輪、閥桿、手柄和閥蓋等零部件組成(圖1)。閥門由手柄驅(qū)動，通過手柄帶動

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