CERTIFICATIONS Below are the certifications GWC Valve International, Inc. have acheived. To view and download, please click on the link below: API Certification: 6A API Certification: 6D Design, Development, and Manufacture of Industrial Valves: ISO 9001:2000 Pressure Equipment Directive: PED 97/23/EC GOST Certification: GOST #7441112 GOST #1643667 GOST #1643668 GOST #1643669 GOST #1643670 GOST #1643671