当前位置: 首页>通用阀门系列

美标不锈钢旋启式止回阀

概述:

美标旋启式止回阀是指依靠介质本身流动而自动开、闭阀瓣,用来防止介质倒流的阀门,又称逆止阀、单向阀、逆流阀、和背压阀。止回阀属于一种自动阀门,其主要作用是防止介质倒流、防止泵及驱动电动机反转,以及容器介质的泄放。止回阀还可用于给其中的压力可能升至超过系统压的辅助系统提供补给的管路上。止回阀主要可分为旋启式止回阀(依重心旋转)与升降式止回阀(沿轴线移动)。这种类型的阀门的作用是只允许介质向一个方向流动,而且阻止方向流动。通常这种阀门是自动工作的,在一个方向流动的流体压力作用下,阀瓣打开;流体反方向流动时,由流体压力和阀瓣的自重合阀瓣作用于阀座,从而切断流动。

主要外形尺寸及连接尺寸:

美标(ANSI)150LB
DNDN/inLDD1D2bzxфdH≈
401 1/216512598.47312.74xф16154
50203150120.792.114.34xф19144
652 1/2216180139.7104.815.94xф19150
803241190152.412717.54xф19210
1004292230190.5157.222.38xф19217
1255330255215.9185.722.38xф22.5235
1506356280241.321623.98xф22.5305
2008495345298.5270278xф22.5370
25010622405362323.828.612xф25.5417
30012698485431.838130.212xф25.5478
35014787535476.3412.833.412xф28.5540
40016864595539.84703516xф28.5620
45018978635577.9533.438.116xф32685
50020978700635584.241.320xф32720
600241295815749.3692.246.120xф35880
650261295870806.474966.724xф35910
700281448925863.680069.928xф351050
750301524985914.485773.128xф351050
美标(ANSI)300LB
DNDN/inLDD1D2bzxфdH≈
401 1/2241155114.37319.14xф22.5165
50267165127.292.120.78xф19170
652 1/2292190149.2104.823.98xф22.5190
803318210168.3127278xф22.5216
1004356255200157.230.28xф22.5260
1255400280235185.733.48xф22.5280
1506444320269.92163512xф22.5305
2008533380330.227039.712xф25.5368
25010622445387.4323.846.116xф28.5410
30012711520450.838149.316xф32445
35014838585514.4412.852.420xф32570
40016864650571.547055.620xф35630
45018978710628.6533.458.824xф35676
500201016775685.8584.26224xф35740
600241346915812.8692.268.324xф41900
650261346970876.374977.828xф44.5930
7002814991035939.880084.228xф44.51163
750301594109099785790.528xф481270
美标(ANSI)600LB
DNDN/inLDD1D2bzxфdH≈
5029216512792.125.48xф19203
652 1/2330190149.2104.828.68xф22.5229
803356210168.312731.88xф22.5235
1004432275215.9157.238.18xф25.5286
1255508330266.7185.744.58xф28.5340
1506559355292.121647.712xф28.5365
2008660420349.227055.612xф32445
25010787510431.8323.863.516xф35500
3001283856048938166.720xф35545
35014889605527412.87020xф38670
4001699168560347076.220xф41715
450181092745654533.482.624xф44.5785
500201194815723.9584.29024xф44.5845
600241397940838.2692.2101.624xф511025