凸耳式雙瓣止回閥 支耳式逆止閥
簡要描述：RETZ進口凸耳式雙瓣止回閥（蝶式逆止閥）亦稱凸耳蝶式逆止閥，蝶式雙瓣旋啟式單向閥，用于防止介質倒流。選用不同的材質，可適用于水、蒸汽、油品、硝酸、醋酸、強氧化性介質及尿素等多種介質
品牌：RETZ- 工況條件：單向逆止
- 溫度/壓力：P-T: 2500LB@540℃
- 更新時間：2022/10/14
進口凸耳式雙瓣止回閥，支耳式逆止閥慨述 Express with regret
凸耳式雙瓣止回閥（蝶式逆止閥）適用于公稱壓力PN1.0MPa~42.0MPa、Class150~2500；公稱通徑DN15~1200mm、NPS1/2-48；工作溫度-196~540℃的各種管路上，用于防止介質倒流 RETZ Wafer type double disc check valve (butterfly check valve) is applicable to nominal pressure PN1.0MPa~42.0MPa, Class150~2500; Nominal diameter DN15~1200mm, NPS 1/2-48; On various pipelines with operating temperature of - 196~540 ℃, it is used to prevent reverse flow of media
標準與規范 Standards and specifications
1、設計與制造∶API594、API6D、JB/T8937；
2、結構長度∶API594、API6D、DIN3202、JB/T8937；
3、壓力-溫度等級∶ASMEB16.34、DIN2401、GB/T12224；
4、試驗與檢驗∶API598、GB/T26480；
5、配管法蘭∶ JBT74-90、GBT9113、HG20592-20635、SH3406、ASME B16.5、DIN2543-2548、GB/T13402、AP1605、ASME B16.47
進口凸耳式雙瓣止回閥，支耳式逆止閥結構對比 Structure Comparison of Lug and Flange Check Valves
結構形式 | 對夾雙瓣旋啟式止回閥 | 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,閥瓣行程長,需要較長的關閉時間 |
對夾雙瓣旋啟式止回閥型的水錘壓力只有法蘭單瓣旋啟式止回閥的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 |
對夾雙瓣旋啟式止回閥型的結構長度只有法蘭單瓣旋啟式止回閥型的1/4~1/6 對夾雙瓣旋啟式止回閥型的重量只有法蘭單瓣旋啟式止回閥型的1/4~1/10 | ||
流體阻力 | 小,流體阻力系數S為2.6~0.7,隨著閥門口徑的增大 流體阻力系數減小 | 小,流體阻力系數為1.3~3,但在低壓工況下,閥瓣不能完全開啟,流體阻力大.流體阻力隨著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 | 閥體為整體結構,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 |
結構特點 Structural characteristics
1、結構長度短，其結構長度只有傳統法蘭止回閥的1/4~1/8 The structure length is short, which is only 1/4~1/8 of the traditional flange check valve
2、體積小、重量輕，其重量只有傳統法蘭止回閥的1/4~1/20 Small size and light weight, its weight is only 1/4~1/20 of that of traditional flange check valve
3、閥瓣關閉快速，水錘壓力小 The valve clack closes quickly and the water hammer pressure is small
4、水平管道或垂直管道均可使用，安裝方便 Both horizontal pipe and vertical pipe can be used for convenient installation
5、流道通暢、流體阻力小 Smooth flow passage and small fluid resistance
6、動作靈敏、密封性能好 Sensitive action, good sealing performance
7、閥瓣行程短、關閉沖擊力小 Short disc stroke and small closing impact
8、整體結構、簡單緊湊、造型美觀 Overall structure, simple and compact, beautiful appearance
9、使用壽命長、可靠性高 Long service life and high reliability
流體力學性能/對夾雙瓣旋啟式止回閥的體積流量與壓力降關系
Hydrodynamic performance/volume flow and pressure drop relationship of wafer double flap swing check valve
流體力學性能/對夾雙瓣旋啟式止回閥的流體阻力系數
The hydromechanics performance/to clamps the double petal to turn on lathe opens the type check valve the fluid resistance coefficient
流體力學性能/對夾雙瓣旋啟式止回閥流體阻力系數、流量系數及開啟壓力
The hydromechanics performance/to clamps thedouble petal to turn on lathe opens the type check valve fluid resistance coefficient, the discharge coefficient and the opening pressure
公稱通徑 Norminal diameter | 閥門全開啟時的流體阻力累數苦When the valve is fullyopen fluid resistancecoefficient | 常溫下閥門開啟時的水流量系數Room temperature, water flow when the valve opening coefficient | 流體的流向 Fluid flow | ||||
↑ | → | ||||||
DN | NPS | Kv(m3/h) | Cv(U.S) | Cv(U.K) | 開啟壓力近似值KPaOpen the pressure approximation Kpa | ||
50 | 2 | 2.6 | 63 | 74 | 62 | 2 | 1 |
65 | 2-1/2 | 2.4 | 109 | 128 | 107 | 2 | 1 |
80 | 3 | 2.3 | 172 | 201 | 169 | 2 | 1 |
100 | 4 | 2 | 289 | 338 | 283 | 2 | 1 |
125 | 5 | 1.8 | 476 | 557 | 466 | 2 | 1 |
150 | 6 | 1.5 | 750 | 878 | 735 | 2 | 1 |
200 | 8 | 1.3 | 1432 | 1675 | 1403 | 2 | 1 |
250 | 1 | 1.2 | 2330 | 2726 | 2283 | 2 | 1 |
300 | 12 | 1 | 3676 | 4301 | 3602 | 2 | 1 |
350 | 14 | 0.9 | 5274 | 6171 | 5169 | 2 | 1 |
400 | 16 | 0.8 | 7306 | 8548 | 7160 | 3 | 1 |
450 | 18 | 0.8 | 9246 | 10818 | 9061 | 3 | 1 |
500 | 20 | 0.8 | 11415 | 13356 | 11187 | 3 | 1 |
600 | 24 | 0.7 | 17573 | 20560 | 17222 | 3 | 1 |
700 | 28 | 0.7 | 23919 | 27985 | 23441 | 4 | 1 |
750 | 30 | 0.7 | 27458 | 32126 | 26909 | 4 | 1 |
800 | 32 | 0.7 | 31241 | 36552 | 30616 | 4 | 1 |
900 | 36 | 0.7 | 39539 | 46261 | 38748 | 4 | 1 |
1000 | 40 | 0.7 | 48814 | 57112 | 47838 | 4 | 1 |
1050 | 42 | 0.7 | 53817 | 62966 | 52741 | 4 | 1 |
1200 | 48 | 0.7 | 70292 | 82242 | 68886 | 4 | 1 |
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