True union and flanged Type-14 diaphragm valves, which can be electrically or pneumatically actuated, are available in sizes 0.5 through 2"  with one-piece molded bodies of PVC, CPVC, PP or PVDF. These valves include visual position indication, weir design for excellent throttling capabilities, and built-in travel stop to prevent overtightening and eliminate compressive strain. The body and bonnet are manufactured of solid thermoplastic materials for maximum corrosion resistance. Asahi_IN