We are Advanced Valve Design, and everything we do is advanced. We are both dynamic and progressive and we use the latest designs and technology. We are based in Pennsylvania, but we offer our products anywhere in the world. Our employees are known for their dedication and skill. This means we can offer precision products that are made by true craftsmen. We ensure quality by manufacturing all parts and butterfly valves ourselves. Our goal is to offer superior quality and dedicated customer service. Find out more by contacting us today!