如在阀体外加上外冷却夹套，则可进一步降低对阀材料的要求。
If an external cooling jacket is used, the requirement on valve material can be further reduced.
罐体上设有米洛板或迷宫式夹套，可通过加热或冷却介质来进行循环加热和冷却。
On the tank tody install Milo board or labyrinth type clamp cover, which can contain heating or cooling medium to heat or cool cyclically.
因结晶、汽化等工况需要时，可带冷却或保温夹套。
Cooling or insulation jacket can be provided when required in conditions such as crystallization and gasification.
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