| 摘要 |
<p>A control valve for a fluid treatment system includes a manifold (10) which mounts a pair of open-ended, cylindrical valve bodies (11, 12) and interchangeable single and double poppet valve assemblies (146, 147) received into the open ends of the valve body. The poppet valve assemblies have diaphragm valve actuators disposed between chambers that are in fluid communication with selective ones of an array of pilot valves (13) also mounted on the manifold. The control valve includes a timer mechanism (15) for actuating the pilot valves (13) in a controlled sequence. A tank adapter connects the manifold to a treatment tank. A variety of sequences of flow paths can be selected by selection of the interchangeable poppet valve assemblies, by plugging selected ports in the valve housing, and by capping open, unused ends of the valve bodies.</p> |
