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SAMA standard thermal class


               Class          Ÿ    Ÿ

                                       A   Fully compensated liquid
                                       B   Case compensated liquid
                                       Volumetric principle
                                       Class I   Liquid filled system
                                       Class V  Mercury filled system
                                       Pressure principle
                                       Class II   Vapor filled system
                                       Class III  Gas filled system





















               Fully compensated liquid, mercury or gas filled thermal system  Case compensated liquid, mercury or gas filled thermal system
               - Class IA, IIA or VA                    - Class IB, IIB or VB




































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