4WRA6W1-07-2X/G24N9K4/V力士樂(lè)比例閥

      武漢耀泰機(jī)電設(shè)備有限公司經(jīng)銷著名品牌進(jìn)口液壓配件，經(jīng)銷品牌有德國(guó)力士樂(lè)（電磁閥，減壓閥，溢流閥，插裝閥，單向閥，壓力繼電器，節(jié)流閥，調(diào)速閥，葉片泵，柱塞泵），瑞士萬(wàn)福樂(lè)換向閥，美國(guó)威格士，意大利ATOS，美國(guó)ASCO等，產(chǎn)品廣銷各地，如廣州，深圳，上海，北京，天津，沈陽(yáng)，武漢，長(zhǎng)沙，桂林，南京，寧夏，銀川，哈爾濱，鄭州，昆明，南昌，杭州，福州，大連，濟(jì)南，南寧，克拉瑪依，衡陽(yáng)，肇慶，啟東，泰興，合肥，英德，晉中，青島，荊門，十堰，黃石，唐山，成都，重慶，西安，柳州，昆明，烏魯木齊，得到廣大客戶一致肯定及好評(píng)。

閥門采購(gòu)時(shí)只明確規(guī)格、類別、工壓就滿足采購(gòu)要求的作法，在當(dāng)前市場(chǎng)經(jīng)濟(jì)環(huán)境里是不完
善的。因?yàn)殚y門制造廠家為了產(chǎn)品的競(jìng)爭(zhēng)，各自均在閥門統(tǒng)一設(shè)計(jì)的構(gòu)思下，進(jìn)行不同的創(chuàng)
新，形成了各自的企業(yè)標(biāo)準(zhǔn)及產(chǎn)品個(gè)性。因此在閥門采購(gòu)時(shí)較詳盡的提出技術(shù)要求，與廠家
協(xié)調(diào)取得共識(shí)，作為閥門采購(gòu)合同的附件是十分必要的。

1.通用要求
1.1閥門規(guī)格及類別，應(yīng)符合管道設(shè)計(jì)文件的要求。
1.2閥門的型號(hào)應(yīng)注明依據(jù)的國(guó)標(biāo)編號(hào)要求。若是企業(yè)標(biāo)準(zhǔn)，應(yīng)注明型號(hào)的相關(guān)說(shuō)明。
1.3閥門工作壓力，要求≥管道的工作壓力，在不影響價(jià)格的前提下，閥門可承受的工
壓應(yīng)大于管道實(shí)際的工壓；閥門關(guān)閉狀況下的任何一側(cè)應(yīng)能承受1.1倍閥門工壓值而不滲漏；
閥門開(kāi)啟狀況下，閥體應(yīng)能承受二倍閥門工壓的要求。  ----理想情況下閥門現(xiàn)場(chǎng)要求。
1.4閥門制造標(biāo)準(zhǔn)，應(yīng)說(shuō)明依據(jù)的國(guó)標(biāo)編號(hào)，若是企業(yè)標(biāo)準(zhǔn)，采購(gòu)合同上應(yīng)附企業(yè)文
件。

2.閥門標(biāo)質(zhì)
2.1閥體材質(zhì)，應(yīng)以球墨鑄鐵為主，并注明牌號(hào)及鑄鐵實(shí)際的物理化學(xué)檢測(cè)數(shù)據(jù)。
2.2閥桿材質(zhì)，力求不銹鋼閥桿(2CR13)，大口徑閥門也應(yīng)是不銹鋼嵌包的閥桿。
2.3螺母材質(zhì)，采用鑄鋁黃銅或鑄鋁青銅，且硬度與強(qiáng)度均大于閥桿。
2.4閥桿襯套材質(zhì)，其硬度與強(qiáng)度均應(yīng)不大于閥桿，且在水浸泡狀況下與閥桿、閥
體不形成電化學(xué)腐蝕。---這是閥門生產(chǎn)商考慮的因素。
2.5密封面的材質(zhì)①閥門類別不一，密封方式及材質(zhì)要求不一；②普通楔式閘
閥，銅環(huán)的材質(zhì)、固定方式、研磨方式均應(yīng)說(shuō)明；③軟密封閘閥，閥板襯膠材料的物理化
學(xué)及衛(wèi)生檢測(cè)數(shù)據(jù)；④蝶閥應(yīng)標(biāo)明閥體上密封面材質(zhì)及蝶板上密封面材質(zhì)；它們的物理化
學(xué)檢測(cè)數(shù)據(jù)，特別是橡膠的衛(wèi)生要求、抗老化性能、耐磨性能；通常采用丁晴橡膠及三元乙
丙橡膠等，嚴(yán)禁摻用再生膠。 ----密封件的要求。
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按介質(zhì)工作溫度分類
⑴ 高溫閥 t >450℃的閥門。
⑵ 中溫閥 120℃≤t <450℃的閥門。
⑶ 常溫閥 －40℃≤t <120℃的閥門。
⑷ 低溫閥 -100℃≤t <-40℃的閥門。
⑸ 超低溫閥 t <－100℃的閥門。

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電磁比例換向閥（帶反饋）  4WRE(E)...22...
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