阀体整体环氧树脂涂装， 球阀使阀门的壳体完全与介质隔离， 针阀有效防止阀门被戒指腐蚀。
The whole valve body is epoxy resin lacquer baked, which fully isolate valve shell from media, thus effectively prevent valve gate from being eroded by media.
介绍了一种利用外接气源，向安全阀瓣与爆破片形成的隔离腔内直接充压，对安全阀进行在线检测的方法。
A new technique is described for safety-valve on-line testing in which out-source gas is introduced into the cavity enclosed by the valve plug and rupture disk.
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