Regarding hydrocracking interlocks

2016-07-06View Original

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This post was last edited by zls1457 on 2016-7-6 at 14:21. What do liquid level interlocks and alarm displays in a tank mean? The first one is LAL, NLLL, LSLL – what do they all mean?

Reply #22016-07-06

LAL low level alarm, LSLL low-low interlock; NLLL status unknown.

Reply #32016-07-09

Explanations for the letters preceding the process diagram

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Regarding hydrocracking interlocks

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