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American standard check valve
Product Name:
American standard check valve
Description:

产品名称:美标止回阀

详细内容:

概述
   止回阀的功能是用来防止管路中的介质倒流。止回阀属于自动阀类,启闭件靠流动介质的力量自行开启
或关闭。止回阀只用于介质单向流动的管路上,阻止介质回流,以防发生事故。
   本公司生产的美标止回阀按照ANSI B16.34标准设计制造。品种有:旋启式止回阀,升降式止回阀,升降立式止回阀;Class 150lB~900Lb;NPS 1"~28"工作温度-40~570℃;阀体材料有:WCB,WC1,WC6,WC9,C5,CF3,CF8,CF3M,CF8M等。适用介质:水,蒸气,油品,硝酸,强氧化介质和尿素等。广泛应用于电站,石油,化工,制药,食品等行业。可与进口设备直接配套使用。

标准:
类型 设计与制造 结构长度 法兰尺寸 压力-温度 试验-检验
旋启式止回阀 ANSI B16.34 ANSI B16.10 ANSI B16.5 ANSI B16.34 API
升降式止回阀 BS 1968

压力试验:

公称压力
PN (Lb)
强度试验 水密封试验 气密封试验
Mpa Lbf/i n 2 Mpa Lbf/i n 2 Mpa Lbf/i n 2
150 3.1 450 2.2 315 0.5-0.7 60-100
300 7.8 1125 5.6 815
600 15.3 2225 11.2 1630
900 23.1 3350 16.8 2440

主要零件材料及性能:

体、盖、瓣 阀杆 垫片 密封面 工作温度℃ 适用介质
WCB 2Cr13 增强柔性石墨

13Cr/柔性石墨

不锈钢/耐酸石棉

齿形垫片
13Cr

STL

本体材料

尼龙

PTFE
≤425 水 蒸气 油品 硝酸 醋酸
强氧化介质
尿素
WC1 ≤450
WC6 ≤540
WC9 ≤570
C5 C12 ≤540
CF8 304 ≤200
CF8M 316
CF3 304L
CF3M 316L

主要技术尺寸

公称通径DN 150Lb、10K 300Lb、20K 600Lb 900Lb
in mm L(RF) H 重量(kg) L(RF) H 重量(kg) L(RJ) H 重量(kg) L(RJ) H 重量(kg)
2 50 203 165 17 267 190 28 292 210 32 372 335 120
2 1/2 65 216 175 25 292 205 33 330 230 42 422 370 165
3 80 241 190 29 318 220 45 356 255 60 384 300 115
4 100 292 215 50 356 245 70 432 295 110 460 340 180
6 150 356 265 85 444 295 150 559 365 220 613 425 400
8 200 495 320 150 533 330 230 660 420 390 740 490 690
10 250 622 356 240 622 420 390 787 505 630 841 585 1020
12 300 698 415 350 711 480 520 838 545 870 968 655 1550
14 350 787 460 460 838 535 710 889 600 940 1038 710 2000
16 400 864 495 580 864 585 890 991 650 1100 1140 765 2500
18 450 978 590 690 978 615 1000 1092 735 1300 1232 810 3000


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