Essential character test governs classification of pressure regulator with flow-meter; prior approval cannot estop correct tariff application.

A combined pressure regulator fitted with a flow-meter was treated as classifiable under Heading 84.81 because, on the HSN Notes and product literature, it retained the essential character of a pressure-regulating appliance; the presence of the flow-meter did not alter that basic function. The document also states that prior approval of classification lists did not create an estoppel against correct tariff classification, so the Department could revise an earlier approved position once the legal classification was found to be wrong. The Department's classification was therefore sustained and the assessee's challenge failed.

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Issues: (i) Whether pressure regulator with flow-meter is classifiable under Chapter sub-heading 84.81 or under sub-heading 9026.00 of the Central Excise Tariff Act, 1985; (ii) Whether the Department was precluded from changing the earlier approved classification.

Issue (i): Whether pressure regulator with flow-meter is classifiable under Chapter sub-heading 84.81 or under sub-heading 9026.00 of the Central Excise Tariff Act, 1985

Analysis: The combined apparatus was examined in the light of the HSN Notes to Heading 84.81 and the product literature. The decisive test applied was whether the combination retained the essential character of a pressure-regulating appliance. The material showed that the flow-meter was mounted with the pressure regulator and did not displace its basic function of regulating gas pressure and flow. A combined instrument of this kind was treated as remaining within Heading 84.81 where it retained the essential character of that heading.

Conclusion: The item was held to be classifiable under Chapter sub-heading 84.81 and not under sub-heading 9026.00, against the assessee.

Issue (ii): Whether the Department was precluded from changing the earlier approved classification

Analysis: The earlier approval of classification lists did not create an estoppel against the correct application of tariff law. Reliance was placed on the principle that revenue authorities are not bound to perpetuate an incorrect classification once the legal position is found to be different.

Conclusion: The Department was not barred from revising the classification, against the assessee.

Final Conclusion: The classification adopted by the Department was sustained and the appeal failed.

Ratio Decidendi: Where a combined appliance retains the essential character of a pressure-regulating device, it remains classifiable under the tariff heading for such appliances, and an earlier approved classification cannot operate as an estoppel against law.

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