Excise & vat queries for exporter

Hi,

I am a Trader/Exporter based out of Mumbai. I am into trading/exporting of Capital Equipments (Process Equipments, Packaging Equipments for Food Industry). I purchase the machines from the manufacturers who are based out of various locations like Ahmedabad, Noida, Mumbai, etc and sell those machines in Countries like Bangladesh. 

My query here is When i Purchase machine, manufacturer charges me VAT/CST and Excise. I can nullify the VAT/CST by submitting Form H to the manufacturer along with the Purchase Order. Is there any way by which i can get the Excise nullified since I cannot charge excise to the buyer in Bangladesh.

Some detailed explanation will be much appreciated.

Thanks.