旋启式止回阀又称单向阀或止回阀,其作用是防止介质回流到管道中。开启和关闭部分由媒体流的力量。止回阀是自动阀门,主要用于介质单向流动的管道,允许介质单向流动,防止事故发生。这种阀门应水平安装在管道中。旋启式止回阀适用公称压力PN1.0MPa~42.0MPa, Class150-2500;公称通径DN15~1200mm, NPS1/2~48;对管道工作温度196~540℃,防止介质倒流。通过使用不同的材料(WCB、CF8 (M)、CF3 (M)、1Gr5Mo、15CrMo1V,可应用于水、蒸汽、油、硝酸、乙酸、强氧化介质和尿素等介质。主要用于石油、化工、制药、化肥、电力等管道。旋启式止回阀采用内置摇臂摆动结构,所有启闭部件均设置在阀体内,阀门不贯通,除密封垫片和带法兰的密封圈外,整体无泄漏,防止阀门可能发生泄漏。 Swing check valve rocker arm and disc connection with spherical structure, so that the valve flap in the range of 360 degrees have a certain degree of freedom, there is an appropriate micro position compensation.Suitable for clean medium, not suitable for containing solid particles and viscosity medium Model NO.: H44H-150LB-DN150 Connection Form: Flange Pressure: High Pressure Sealing Form: Gland Packings Standard: ANSI Certification: ISO9001:2008,JIS,Kc,API