进口对夹旋启式单瓣止回阀，旋启式逆止阀慨述 Express with regret

对夹式双瓣止回阀（蝶式逆止阀）适用于公称压力PN1.0MPa~16.0MPa、Class150~900；公称通径DN15~1200mm、NPS2-24；工作温度-40~350℃的各种管路上，用于防止介质倒流  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 

标准与规范 Standards and specifications

1、设计与制造∶API594、API6D、JB/T8937；

2、结构长度∶API594、API6D、DIN3202、JB/T8937；

3、压力-温度等级∶ASMEB16.34、DIN2401、GB/T12224；

4、试验与检验∶API598、GB/T26480；

5、配管法兰∶ JBT74-90、GBT9113、HG20592-20635、SH3406、ASME B16.5、DIN2543-2548、GB/T13402、AP1605、ASME B16.47

进口对夹旋启式单瓣止回阀，旋启式逆止阀结构特点 Structural characteristics

1、结构长度短，其结构长度只有传统法兰止回阀的1/4~1/8 The structure length is short, which is only 1/4~1/8 of the traditional flange check valve

2、体积小、重量轻，其重量只有传统法兰止回阀的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、阀瓣关闭快速，水锤压力小 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，安装方便 Both horizontal pipe and vertical pipe can be used for convenient installation

5、流道通畅、流体阻力小 Smooth flow passage and small fluid resistance

6、动作灵敏、密封性能好 Sensitive action, good sealing performance

7、阀瓣行程短、关闭冲击力小 Short disc stroke and small closing impact

8、整体结构、简单紧凑、造型美观 Overall structure, simple and compact, beautiful appearance

9、使用寿命长、可靠性高 Long service life and high reliability

流体力学性能/对夹单瓣旋启式止回阀的体积流量与压力降关系

Hydrodynamic performance/volume flow and pressure drop relationship of wafer double flap swing check valve

流体力学性能/对夹单瓣旋启式止回阀的流体阻力系数

The hydromechanics performance/to clamps the double petal to turn on lathe opens the type check valve the fluid resistance coefficient

流体力学性能/对夹单瓣旋启式止回阀流体阻力系数、流量系数及开启压力

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