Understanding end user valve approvals: Part 11a - Castings

摘要

There are typically four models that end users see. They are listed below. 1. The valve manufacturer uses only third party foundries (i.e the most common); 2. The valve manufacturer has a "Joint Venture Foundry"; 3. The valve manufacturer is vertically integrated with their own foundry and also use other third party foundries; 4. The valve manufacturer is vertically integrated with their own foundry and use no other foundries.