對夾式止回閥 彈簧式逆止閥
簡要描述：RETZ進口對夾式止回閥，彈簧式逆止閥適用于中小口徑的場合,閥瓣隨著介質壓力作用沿著中心軸向前推,介質流通;當介質壓力間斷,在彈簧的作用下,閥瓣回座
品牌：RETZ- 工況條件：單向 逆止
- 溫度/壓力：P-T: 483bar@25℃/246bar@648℃
- 更新時間：2022/10/15
進口對夾式止回閥，彈簧式逆止閥慨述 Express with regret
對夾式止回閥（升降式逆止閥）適用于中小口徑的場合,閥瓣隨著介質壓力作用沿著中心軸向前推,介質流通;當介質壓力間斷,在彈簧的作用下,閥瓣回座,阻止介質倒流 RETZ Wafer check valve (lift check valve) is applicable to small and medium caliber situations. The valve clack is pushed forward along the central axis with the medium pressure, and the medium flows; When the medium pressure is interrupted, the valve clack will return to its seat under the action of the spring to prevent the medium from backflow
技術參數 Technical paramete
工作壓力(MPa) | 1.6~15.0 Class150-Calss900 | |
口徑(mm) | DN15-DN200 1/2″-8″ | |
適用介質 | 水、油、氣、各種腐蝕性介質 | |
可選材料 | 閥體 | WCB CF8 CF8M CF3 CF3M |
閥瓣 | WCB CF8 CF8M CF3 CF3M | |
密封面 | 不銹鋼 司太立合金 PTFE | |
彈簧 | F304 F316 F304L F316L | |
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
進口對夾式止回閥，彈簧式逆止閥性能比較 Performance Comparison of Wafer and Flange Lift Check Valves
結構形式 | 對夾升降式止回閥 | 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,體積較大,重量很重 |
對夾升降型的結構長度只有法蘭升降型的1/4~1/8 對夾型的重量只有法蘭型的1/7~1/20 | ||
流體阻力 | 較大,流體阻力系數為6.4~2.8 | 很大,流體阻力系數為12~6 |
安裝 | 可水平安裝或垂直安裝,重量很輕,安裝容易 | 只有水平安裝,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將閥瓣完全打開 |
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,多了一個潛在的泄漏點 |
進口對夾式止回閥，彈簧式逆止閥結構特點 Structural characteristics
結構長度小、動作靈敏、密封性能好 Small structure length, sensitive action and good sealing performance
在水平和垂直位置安裝都行 It can be installed in both horizontal and vertical positions
優異的水壓性能、閥瓣關閉快速．水錘壓力小 Excellent water pressure performance, fast valve disc closing, low water hammer pressure
流道通暢、低水頭損失、流體阻力小 Smooth flow passage, low head loss and small fluid resistance
耐高壓和高溫性能、整體結構,可靠性高 High pressure and high temperature resistance, overall structure, high reliability
防“水錘”Prevention of "water hammer"
動作靈敏、密封性能好 Sensitive action, good sealing performance
閥瓣行程短、關閉沖擊力小 Short disc stroke and small closing impact
流體力學性能/對夾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系數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 thevalve 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 | |||
15 | 1/2 | 6.4 | 2.6 | 3 | 2.5 | 3 | 2 | 2.5 |
20 | 3/4 | 5.1 | 6.4 | 7.5 | 6.3 | 3 | 2 | 2.5 |
25 | 1 | 4.1 | 12.6 | 14.8 | 12.3 | 3 | 2 | 2.5 |
32 | 1-1/4 | 4.1 | 19.7 | 23.1 | 19.3 | 3 | 2 | 2.5 |
40 | 1-1/2 | 3.8 | 29.5 | 34.5 | 28.9 | 3 | 2 | 2.5 |
50 | 2 | 3.5 | 54.6 | 63.9 | 53.5 | 3 | 2 | 2.5 |
65 | 2-1/2 | 3.5 | 85.4 | 99.9 | 83.7 | 3 | 2 | 2.5 |
80 | 3 | 3.2 | 128 | 150 | 125 | 3 | 2 | 2.5 |
100 | 4 | 2.8 | 244 | 286 | 249 | 3 | 2 | 2.5 |
125 | 5 | 2.9 | 375 | 439 | 368 | 3 | 1 | 2.2 |
150 | 6 | 3.1 | 522 | 611 | 512 | 3 | 1 | 2.2 |
200 | 8 | 3.2 | 915 | 1070 | 897 | 3 | 1 | 2.2 |
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