Made in the USA, the Sup-R-Seal is a double block and bleed expanding gate valve made by Louisiana Valve Source. The Sup-R-Se ... al features all of the proven benefits of the expanding gate valve design with domestic quality and the shortest industry lead times. - API 6D Certification - Texas & Louisiana Manufacturing Facilities - 100% Domestic Castings - Superior Materials of Construction - Sizes: 3" - 30" read more