進口法蘭式雙瓣止回閥，蝶式逆止閥慨述 Express with regret

對夾雙瓣止回閥亦稱之為蝶式雙瓣止回閥,閥板為兩個半圓，且采用彈簧強制復位,適用于中小口徑的場合,當介質按規定方向流動時，閥瓣受介質力的作用，被開啟;介質逆流時，因閥瓣自重和閥瓣受介質反向力的作用，使閥瓣與閥座的密封面密合而關閉，達到阻止介質逆流的目的 RETZ inlet double clip double flap check valve is also called butterfly double flap check valve. The valve plate is two semicircles, and the spring is used for forced return. It is suitable for small and medium caliber occasions. When the medium flows in the specified direction, the valve flap is opened under the action of the medium force; When the medium is countercurrent, the valve clack is closed due to its dead weight and the reverse force of the medium, which makes the sealing surface of the valve clack and the valve seat close, so as to prevent the medium from countercurrent

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

進口法蘭式雙瓣止回閥，蝶式逆止閥結構特點 Structural characteristics

流道通暢、流體阻力小 Smooth flow passage and small fluid resistance

閥瓣行程短、關閉沖擊力小 Short disc stroke and small closing impact

密封圈采用多條窄帶設計，閥座直接硫化到閥體上，使密封性能達到完全密封，實現零泄漏 The sealing ring is designed with multiple narrow bands, and the valve seat is directly vulcanized to the valve body, so that the sealing performance can reach full sealing and zero leakage can be achieved

結構性能安全可靠，抗干擾性強，關閉速度快，水頭損失小  Safe and reliable structural performance, strong anti-interference, fast closing speed and small head loss

閥瓣行程短、關閉沖擊力小 Short disc stroke and small closing impact

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

流體力學性能/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/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/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