进口法兰式双瓣止回阀，蝶式逆止阀慨述 Express with regret

对夹双瓣止回阀亦称之为蝶式双瓣止回阀,阀板为两个半圆，且采用弹簧强制复位,适用于中小口径的场合,当介质按规定方向流动时，阀瓣受介质力的作用，被开启;介质逆流时，因阀瓣自重和阀瓣受介质反向力的作用，使阀瓣与阀座的密封面密合而关闭，达到阻止介质逆流的目的 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

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

进口法兰式双瓣止回阀，蝶式逆止阀结构特点 Structural characteristics

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

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

密封圈采用多条窄带设计，阀座直接硫化到阀体上，使密封性能达到完全密封，实现零泄漏 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

结构性能安全可靠，抗干扰性强，关闭速度快，水头损失小  Safe and reliable structural performance, strong anti-interference, fast closing speed and small head loss

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

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

流体力学性能/双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/双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/双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