力士乐插装式单向阀MSR20KE02-1X详细介绍

力士乐插装式单向阀MSR20KE02-1X 武汉百士自动化设备有限公司供应产品，原厂原装，质量保障，价格优惠；移动电话：15307150607（同微信），电话：027-87680708-604，商务QQ：3319918908，邮箱：3319918908@qq.com，传真：027-87680708-608，联系人：李锐；欢迎新老客户咨询购买！

单向阀是流体只能沿进水口流动，出水口介质却无法回流，俗称单向阀。单向阀又称止回阀或逆止阀。用于液压系统中防止油流反向流动,或者用于气动系统中防止压缩空气逆向流动。单向阀有直通式和直角式两种。直通式单向阀用螺纹连接安装在管路上。直角式单向阀有螺纹连接、板式连接和法兰连接三种形式。

力士乐插装式单向阀MSR20KE02-1X

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单向阀又称止回阀或逆止阀。用于液压系统中防止油流反向流动,或者用于气动系统中防止压缩空气逆向流动。

单向阀有直通式和直角式两种。直通式单向阀用螺纹连接安装在管路上。直角式单向阀有螺纹连接、板式连接和法兰连接三种形式。液控单向阀也称闭锁阀或保压阀，它与单向阀相同，用以防止油液反向流动。但在液压回路中需要油流反向流动时又可利用控制油压，打开单向阀，使油流在两个方向都可流动。液控单向阀采用锥形阀芯，因此密封性能好。在要求封闭油路时，可用此阀作为油路的单向锁紧而起保压作用。液控单向阀控制油的泄漏方式有内泄式和外泄式二种。在油流反向出口无背压的油路中可用内泄式;否则需用外泄式，以降低控制油压力。

单向阀

单向阀

安装位置

单向阀就是止回阀 旋启式止回阀安装位置不受限制，通常安装于水平管路，但也可以安装于垂直管路或倾斜管路上。

注意事项

安装止回阀时，应特别注意介质流动方向，应使介质正常流动方向与阀体上指示的箭头方向相一致，否则就会截断介质的正常流动。底阀应安装在水泵吸水管路的底端。

止回阀关闭时，会在管路中产生水锤压力，严重时会导致阀门、管路或设备的损坏，尤其对于大口管路或高压管路，故应引起止回阀选用者的高度注意。

止回阀只供防止各类管路或设备上流体介质逆流的单向启闭阀。

技术参数

公称通径:21/16"~41/16"

工作压力:2,000~15,000PSI

温度:-60°C~+121°C(K,U)

产品规范级别:PSL3~4

产品性能级别:PR1~2

材料级别:AA~FF

常见故障

常见故障

阀瓣打碎;

介质倒流。

引起阀瓣打碎的原因

止回阀前后介质压力处于接近平衡而又互相"拉锯"的状态，阀瓣经常与阀座拍打，某些脆性材料(如铸铁、黄铜等)做成的阀瓣就被打碎。

预防的办法是采用阀瓣为韧性材料的止回阀。

介质倒流的原因

密封面破坏;

夹入杂质。修复密封面和清洗杂质，就能防止倒流。

双旋启动式止回阀用途及特性

旋启式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

结构

结构

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。 旋启式止回阀适用介质: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。对夹式止回阀适用于公称压力PN1.0MPa~42.0MPa、Class150~2500;公称通径DN12~1200mm、NPS1/2~48;工作温度-196~540℃的各种管路上，用于防止介质倒流。通过选用不同的材质，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。

特点

单向阀是气流只能一个方向流动而不能反向流动的方向控制阀。其工作原理与液压单向阀一样。压缩空气从P口进入，克服弹簧力和摩擦力使单向阀阀口开启，压缩空气从P流至A;当P口无压缩空气时，在弹簧力和A口(腔)余气力作用下;阀口处于关闭状 态，使从A至P气流不通。单向阀应用于不允许气流反向流动的场合，如空压机向气罐充气 时，在空压机与气罐之间设置一单向阀，当空压机停止工作时，可防止气罐中的压缩空气回流 到空压机。单向阀还常与节流阀、顺序阀等组合成单向节流阀、单向顺序阀使用。

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