| 摘要 |
<p>An irrigation water and measuring delivery system comprising a series of units each comprising two slide action spindle valves that may be in common body shell with inter-connecting ducts to form a metering valve (4) and a switch control valve (10) station serving an inverted dome reservoir. Supply water pressure supplies the energy for valve operation. The valves sense the internal fluid pressure and operate through a cycle of accepting a water charge in the reservoir, and a dump release of this charge and a signal initiating sequential operation of the next delivery unit. The size and the water charge of the individual reservoirs are selectable.</p> |
