Modvat input credit for heat transfer oil was upheld because indispensable process heat qualified as use in relation to manufacture.

Heat Transfer Oil used as a continuously circulated heating medium in the manufacture of Linear Alkyl Benzene was treated as an input used "in or in relation to manufacture" under Rule 57A because it had a direct, pervasive and indispensable role in production. The oil supplied the heat required at multiple stages of the process, including extraction of paraffin and production and separation of LAB, and was not merely a fuel or a component making the apparatus functional. On that basis, Modvat credit was held admissible.

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Issues: Whether Heat Transfer Oil used as a heating medium in the manufacture of Linear Alkyl Benzene was an eligible input for Modvat credit under Rule 57A of the Central Excise Rules, 1944.

Analysis: The oil was continuously circulated after pre-heating and supplied the heat required at various stages of the process, including extraction of paraffin and production and separation of LAB. The use of the oil was not disputed and it had a pervasive and direct role in the manufacturing process. It did not function as a fuel, and its role was not confined to making the apparatus functional. The expression "in or in relation to the manufacture" was applied broadly, consistently with prior decisions holding that goods having a significant and indispensable role in production qualify as inputs, even if they are used in the manufacturing apparatus and do not directly participate in a chemical reaction.

Conclusion: Heat Transfer Oil was held to be an input eligible for Modvat credit under Rule 57A, in favour of the assessee.

Ratio Decidendi: A material that supplies indispensable heat for the actual manufacturing process and has a direct and pervasive role in production is an input used in or in relation to manufacture under Rule 57A, even if it is circulated through the manufacturing apparatus.

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