Series CKM valves maintain a bubble-tight seal in whatever position it is mounted. The patented diaphragm automatically positions itself against the valve seat in an identical location each and every time. This feature results in improved performance, reduced wear and long-term service life. In addition, valves are chatter-proof as well as leak-proof. Since there is no internal sliding or loose parts to slam or vibrates, chattering is eliminated and operation is silent. Available in sizes 1/2 inches, 3/4 inches NPT, standard body material is PVC, with polypropylene, PVDF and Teflon® also available. Diaphragms are Buna-N, EPDM or Viton®