浙江鼎新閥門有限公司

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泛博电竞

全國熱線:

0577-55555525
用途

  對夾式止回閥适用于公稱壓力PN1.0MPa~42.0MPa 、Class150~2500;公稱通徑DN12~1200mm、NPS1/2~48;工作溫度-196~540℃的各種管路上,用于防止介質倒流。通過選用不同的材質,可适用于水、蒸汽、油品、硝酸、醋酸、強氧化性介質及尿素等多種介質。

标準與規範
1、設計與制造:API 594、API 6D、JB/T 8937;
2、結構長度:API 594、API 6D、DIN 3202、JB/T 8937;
3、壓力-溫度等級:ANSI B 16.34、DIN 2401、GB/T 9124、HG 20605、SH 3406、JB/T 74;
4、試驗與檢驗:API 598、JB/T 9092;
5、配管法蘭:JB/T 74~90、GB/T 9112~9124、HG 20592~20635、SH 3406、ANSI B 16.5、DIN 2543~2548、GB/T 13402、API 605、ASME B 16.47。
結構特點

1、結構長度短,其結構長度隻有傳統法蘭止回閥的1/4~1/8;
2、體積小、重量輕,其重量隻有傳統法蘭止回閥的1/4~1/20;
3、并瓣關閉快速,水錘壓力小;
4、水平管道或垂直管道均可使用,安裝方面;
5、流道通暢、流體阻力小;

6、動作靈敏、密封性能好;
7、閥瓣行程短、關閥沖擊力小;
8、整體結構、簡單緊湊、造型美觀;
9、使用壽命長、可靠性強;

結構形式
H44型法蘭單瓣旋啟式止回閥
水錘壓力
小,閥瓣行程短、且有彈簧輔助關閉、關閥速度快
很大,閥瓣行程式長,需要較長的關閉時間
H76型的水錘壓力隻有H44型的1/2~1/5
尺寸和重量

結構長度很短、體積小、重量輕,為閥門的安裝、搬運、存放及管道的布置帶來很大的便利,并能大量節約材料、降低造價

結構長度很長,體積笨大,重量很重
H76型的結構長度隻有H44型的1/4~1/6,H76型的重量隻有H44型的1/4~1/10
流體阻力
小,流體阻力系數ξ為2.6~2.7,随着閥門口徑的增大,流體阻力系數減小
小,流體阻力系數ξ為1.3~3,但在低壓工況下,閥瓣不能完全開啟,流體阻力大。流體阻力随着閥門口徑的增大而增大
安裝
可水平安裝或垂直安裝、重量輕,不必為閥門設置支座
可水平安裝或垂直安裝、大口徑閥門重量重,需設置支座
開啟壓力
很小,閥瓣在很小的壓差下就能完全打開
較大,閥瓣在較大的壓差下才能完全打開
可靠性
閥門為整體結構,簡單緊湊、閥門關閉時沖擊力小,水錘壓力小,閥門壽命長,可靠性高
閥門關閉時的巨大沖擊力及水錘壓力容易損壞閥門

升降式止回閥對比
結構形式
H41型法蘭升降式止回閥
水錘壓力
很小,閥瓣行程短、閥瓣輕巧、且有彈簧輔助關閉、關閥速度快
小,閥瓣行程短,但無彈簧輔助關閉
尺寸和重量
結構長度很短、體積很小、重量很輕,為閥門的安裝、搬運、存放及管道的布置帶來很大的便利,并能大量節約材料、降低造價
結構長度很長,體積笨大,重量很重
H71型的結構長度隻有H41型的1/4~1/8,H71型号的重量隻有H41型的1/7~1/120
流體阻力
較大,流體阻力系數ξ為6.4~2.8
很大,流體阻力系數ξ為12~6
安裝
可水平安裝或垂直安裝,重量很輕,安裝容易
隻能水平安裝,口徑較大的閥門重量重,較難安裝
開啟壓力
很小,閥瓣在很小的壓差下就能完全打開
較小,閥瓣重量較大,需要一定的壓差才能将閥瓣完全打開
可靠性
閥門為整體結構,簡單緊湊、閥門關閉時沖擊力小,水錘壓力很小,閥門壽命長,可靠性高
可靠性較高,但閥門由閥體與閥蓋兩體構成,多了一個潛在的洩漏點

0577-86917928 http//www.zjdxv.com dingxinfalan@163.com 溫州經濟技術開發區濱海園區三道三路589号
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