Val-Matic has developed and released a guide for the selection of materials used in valves. The guide covers the use of elastomers and metals in over 300 different chemical applications. Where appropriate, maximum temperature designations are also provided. The guide was developed to help engineers specify appropriate materials when designing systems and selecting valves. Copies are available for on charge by contacting Val-Matic. Based in the Chicago suburb of Elmhurst, Illinois, Val-Matic manufactures of Butterfly, Plug, Air and Check valves for municipal, commercial building and industrial applications.