- At iPolymer, we manufacture five types of High Purity Manual Valve which include, Ball Valves, Stopcock Valves, Plug Valves, Metering Valves, Check Valves. Our most popular high purity valves are manufactured from a polymer refers to as PTFE. We have years of experience in providing high-grade PTFE valve solutions. We are able to provide both standard and custom valve connections that are suitable for the harsh - caustic environments as well as ultra clean applications. br br iPolymer br 5 Studebaker, Irvine, CA, 92618 br Tel Number: 949-458-3731 br Fax Number: 949.458.2787 br Email: info@ipolymer.