双向球阀:
   双向球阀为手动调节的截止阀，双向流通无方向限制，操作比其它截止阀方便。用于冷藏、冷冻和空气调节装置的液体、吸气和热汽管路上。该双向球阀全开时提供最大流量，全闭时严密性最好，同时该阀的工作温度范围宽广。-40℃—＋140℃。

膜片式单向阀介绍：
　　膜片式单向阀采用磁性膜片设计，金属和金属密封，应用于压缩机排气管路上，内部采用导向装置、自吸机构设计、从而使单向阀不受安装角度限制和反向压力大小的关系影响阀门的自动闭合。
膜片式单向阀特点：
　　1、磁性阀座、覆膜阀片组合设计.
　　2、逆向近乎零泄漏
　　3、安装角度不受限制
　　4、适用于所有制冷剂
　　5、极小的流通阻力,大流量
    6、阀体中装有过滤网
Magnetic Check Valve:
    The magnetic check valve was adopted magnetic diaphragm design. It is made by metal and sealed by metal. It is applied on compressor air vent line. For inside, it uses guide installation, automatic suction design, so that the valve can open and close automatically regardless of inference of installation angle and backpressure change
Character:
    1.Magnetic valve seat, diaphragm and valve plate combined design.
    2.Nil leaking backwards
    3.No restriction on installation angle.
    4.Suitable for all refrigerants.
    5.Very small circulate obstacle, but large flow rate.
    6.With strainer inside.