進口對夾旋啟式單瓣止回閥，旋啟式逆止閥慨述 Express with regret

對夾式雙瓣止回閥（蝶式逆止閥）適用于公稱壓力PN1.0MPa~16.0MPa、Class150~900；公稱通徑DN15~1200mm、NPS2-24；工作溫度-40~350℃的各種管路上，用于防止介質倒流  RETZ品牌 Wafer type double disc check valve (butterfly check valve) is applicable to nominal pressure PN1.0MPa~16.0MPa, Class150~900; Nominal diameter: DN15~1200mm, NPS2-24; On various pipelines with operating temperature of - 40~350 ℃, it is used to prevent medium backflow 

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

進口對夾旋啟式單瓣止回閥，旋啟式逆止閥結構特點 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/對夾單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/對夾單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/對夾單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