PVC valves are manufactured for many different applications. They are offered in many types of materials and used as an "on/off" and can also be used to throttle the flow of media in the pipe line. Ball valves, check valves, butterfly valves, diaphragm valves and gate valves are some of the main options available in the valve family. These valves range in sizes depending on the type of valve. PVC valves are rated from 150-230PSI and can handle temperatures up to 140 degrees Fahrenheit.