凸耳式双瓣止回阀 支耳式逆止阀
简要描述：RETZ进口凸耳式双瓣止回阀（蝶式逆止阀）亦称凸耳蝶式逆止阀，蝶式双瓣旋启式单向阀，用于防止介质倒流。选用不同的材质，可适用于水、蒸汽、油品、硝酸、醋酸、强氧化性介质及尿素等多种介质
品牌：RETZ- 工况条件：单向逆止
- 温度/压力：P-T: 2500LB@540℃
- 更新时间：2022/10/14
进口凸耳式双瓣止回阀，支耳式逆止阀慨述 Express with regret
凸耳式双瓣止回阀（蝶式逆止阀）适用于公称压力PN1.0MPa~42.0MPa、Class150~2500；公称通径DN15~1200mm、NPS1/2-48；工作温度-196~540℃的各种管路上，用于防止介质倒流 RETZ Wafer type double disc check valve (butterfly check valve) is applicable to nominal pressure PN1.0MPa~42.0MPa, Class150~2500; Nominal diameter DN15~1200mm, NPS 1/2-48; On various pipelines with operating temperature of - 196~540 ℃, it is used to prevent reverse flow of media
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
进口凸耳式双瓣止回阀，支耳式逆止阀结构对比 Structure Comparison of Lug and Flange Check Valves
结构形式 | 对夹双瓣旋启式止回阀 | 法兰单瓣旋启式止回阀 |
水锤压力 | 小,阀瓣行程短、且有弹簧辅助关闭、关阀速度快 | 很大,阀瓣行程长,需要较长的关闭时间 |
对夹双瓣旋启式止回阀型的水锤压力只有法兰单瓣旋启式止回阀的1/2~1/5 | ||
尺寸和重量 | 结构长度很短、体积小、重量轻,为阀门的安装、搬运、存放及管道的布置带来很大的便利,并能大量节约材料、降低造价 | 结构长度很长,体积笨大,重量很重 |
对夹双瓣旋启式止回阀型的结构长度只有法兰单瓣旋启式止回阀型的1/4~1/6 对夹双瓣旋启式止回阀型的重量只有法兰单瓣旋启式止回阀型的1/4~1/10 | ||
流体阻力 | 小,流体阻力系数S为2.6~0.7,随着阀门口径的增大 流体阻力系数减小 | 小,流体阻力系数为1.3~3,但在低压工况下,阀瓣不能完全开启,流体阻力大.流体阻力随着阀门口径的增大而增大 |
安装 | 可水平安装或垂直安装,重量轻,不必为阀门设置支座 | 可水平安装或垂直安装,大口径阀门重量重,需设置支座 |
开启压力 | 很小,阀瓣在很小的压差下就能完全打开 | 较大,阀瓣在较大的压差下才能完全打开 |
可靠性 | 阀体为整体结构,简单紧凑、阀门关闭时冲击力小,水锤压力小,阀门寿命长,可靠性高 | 阀门关闭时的巨大冲击力及水锤压力容易损坏阀门 |
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/对夹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/对夹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
公称通径 Norminal diameter | 阀门全开启时的流体阻力累数苦When the valve is fullyopen fluid resistancecoefficient | 常温下阀门开启时的水流量系数Room temperature, water flow when the valve opening coefficient | 流体的流向 Fluid flow | ||||
↑ | → | ||||||
DN | NPS | Kv(m3/h) | Cv(U.S) | Cv(U.K) | 开启压力近似值KPaOpen the pressure approximation Kpa | ||
50 | 2 | 2.6 | 63 | 74 | 62 | 2 | 1 |
65 | 2-1/2 | 2.4 | 109 | 128 | 107 | 2 | 1 |
80 | 3 | 2.3 | 172 | 201 | 169 | 2 | 1 |
100 | 4 | 2 | 289 | 338 | 283 | 2 | 1 |
125 | 5 | 1.8 | 476 | 557 | 466 | 2 | 1 |
150 | 6 | 1.5 | 750 | 878 | 735 | 2 | 1 |
200 | 8 | 1.3 | 1432 | 1675 | 1403 | 2 | 1 |
250 | 1 | 1.2 | 2330 | 2726 | 2283 | 2 | 1 |
300 | 12 | 1 | 3676 | 4301 | 3602 | 2 | 1 |
350 | 14 | 0.9 | 5274 | 6171 | 5169 | 2 | 1 |
400 | 16 | 0.8 | 7306 | 8548 | 7160 | 3 | 1 |
450 | 18 | 0.8 | 9246 | 10818 | 9061 | 3 | 1 |
500 | 20 | 0.8 | 11415 | 13356 | 11187 | 3 | 1 |
600 | 24 | 0.7 | 17573 | 20560 | 17222 | 3 | 1 |
700 | 28 | 0.7 | 23919 | 27985 | 23441 | 4 | 1 |
750 | 30 | 0.7 | 27458 | 32126 | 26909 | 4 | 1 |
800 | 32 | 0.7 | 31241 | 36552 | 30616 | 4 | 1 |
900 | 36 | 0.7 | 39539 | 46261 | 38748 | 4 | 1 |
1000 | 40 | 0.7 | 48814 | 57112 | 47838 | 4 | 1 |
1050 | 42 | 0.7 | 53817 | 62966 | 52741 | 4 | 1 |
1200 | 48 | 0.7 | 70292 | 82242 | 68886 | 4 | 1 |
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