Sir,
Rule 3 (1) (vii a) of Cenvat Credit Rules, 2004 states that "a manufacturer or producer of final products or a provider of output service shall be allowed to take credit (hereinafter referred to as the CENVAT credit) of the additional duty leviable under sub-section (5) of section 3 of the Customs Tariff Act. Provided that a provider of taxable service shall not be eligible to take credit of such additional duty."
From the above it is clear that only provider of taxable service is not eligible to avail the credit of the additional duty leviable under sub-section (5) of section 3 of the Customs Tariff Act. Since you are a manufacture you are eligible to take credit of SAD.
Rule 4 (2) (a) stipulates that "the CENVAT credit in respect of capital goods received in a factory or in the premises of the provider of output service or outside the factory of the manufacturer of the final products for generation of electricity for captive use within the factory or in the premises of the job worker, in case capital goods are sent directly to the job worker on the direction of the manufacturer or the provider of output service, as the case may be, at any point of time in a given financial year shall be taken only for an amount not exceeding fifty per cent of the duty paid on such capital goods in the same financial year."
In view of this provision you are eligible to take 50% of CVD and SAD paid on capital goods imported by you in the first year and the remaining credit can be taken during any of the subsequent financial years.