大口徑旋啟式止回閥產(chǎn)品概述
H44H(Y)、H64H(Y)止回閥的功能是控制管道內(nèi)介質(zhì)單向流向的閥門，用來防止管路中的介質(zhì)倒流。止回閥屬于自動閥類，啟閉件靠流動介質(zhì)的力量自行開啟或關(guān)閉。止回閥只用于介質(zhì)單向流動的管路上，阻止介質(zhì)回流，以防發(fā)生事故。主要用于石油、化工、制藥、化肥、電力等管路上。
大口徑旋啟式止回閥特點(diǎn)及優(yōu)點(diǎn)
●產(chǎn)品的設(shè)計制造符合美國國家標(biāo)準(zhǔn)ANSI B16.34，美國石油學(xué)會標(biāo)準(zhǔn)API6D要求
●閥門承壓件采用精密鑄造工藝澆鑄，表面質(zhì)量美觀，無粘沙、冷隔等表面缺陷；內(nèi)在質(zhì)量穩(wěn)定，無疏松、砂眼、裂紋等內(nèi)在缺陷。
●旋啟式止回閥采用內(nèi)裝搖臂旋啟式結(jié)構(gòu)，閥門的所有啟閉件都裝于閥體內(nèi)部，不穿透閥體，除了中法蘭部位用密封墊片或密封環(huán)密封外，整體沒有外漏點(diǎn)，杜絕了閥門外泄的可能。
●旋啟式止因閥搖臂和閥瓣連接處采用球面連接的結(jié)構(gòu)，使得閥瓣在360℃范圍內(nèi)有一定的自由度，有適當(dāng)?shù)奈⒘课恢醚a(bǔ)償。
●旋啟式止回閥密封副的密封面堆焊合金鋼(13Cr)或硬質(zhì)合金Slite6,即使用在有細(xì)顆粒的介質(zhì)中并不會因沖蝕而很快磨損。
H44W    H44H(Y)、H64H(Y)國標(biāo)止回閥設(shè)計與制造標(biāo)準(zhǔn)：
●設(shè)計與制造：　GB/T12236
●法蘭尺寸：　JB/T79、GB/T9113
●壓力溫度：ASME B16.34、GB/T9131
●結(jié)構(gòu)長度：　GB/T12221、ASME/ANSI B16.10
●對焊連接尺寸：ASME B16.25、GB/T12224
●檢驗(yàn)與試驗(yàn)：　JB/T9092、GB/T13927
主要材料明細(xì)表

注:客戶需求的其他材質(zhì)也可采用.密封面材料配對客戶內(nèi)件代號決定
 
H44H(Y)、H64H(Y)主要安裝尺寸及重量

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