H44旋启式法兰止回阀nclick=\"null;if（arg1.onmousemove）arg1.onmousemove=null;if（arg1.onmouseover）arg1.onmouseover=null;if（arg1.ondblclick）arg1.ondblclick=null;if（arg1.onmouseenter）arg1.onmouseenter=null;if（arg1.onmouseleave）arg1.onmouseleave=null;return\" result;}?=\"\" style=\"font-size: larger;\">nclick=\"null;if（arg1.onmousemove）arg1.onmousemove=null;if（arg1.onmouseover）arg1.onmouseover=null;if（arg1.ondblclick）arg1.ondblclick=null;if（arg1.onmouseenter）arg1.onmouseenter=null;if（arg1.onmouseleave）arg1.onmouseleave=null;return\" result;}?=\"\" style=\"color: rgb(0, 0, 0);\">是能自动阻止流体倒流的阀门。旋启式止回阀的阀瓣在流体压力作用下开启，流体从进口侧流向出口侧。当进口侧压力低于出口侧时，阀瓣在流体压差、本身重力等因素作用下自动关闭以防止流体倒流。
nclick=\"null;if（arg1.onmousemove）arg1.onmousemove=null;if（arg1.onmouseover）arg1.onmouseover=null;if（arg1.ondblclick）arg1.ondblclick=null;if（arg1.onmouseenter）arg1.onmouseenter=null;if（arg1.onmouseleave）arg1.onmouseleave=null;return\" result;}?=\"\"> 旋启式止回阀严格按 GB12236 标准设计制造，旋启式止回阀的销轴与阀瓣连接采用内装式结构，性能优良，密封更可靠。旋启式止回阀广泛应用于石油、化工、制药、电力行业等各种工况的管路上。