valves s as per api -603

hye guys,

         i am in the process of evaluating vendor quotations for piping stainless steel valves
i had specified gate valves (as per api-600)in my data sheet, some of the vendors have supplied valves as per api 603 while most of the vendors have quoted
valves as per api -600 is there any specific advantage of difference trhat the valve vendor
is taking advantage of so that he can win the quotation ava Received on Tue Apr 18 14:03:00 2000