专利名称：Control apparatus for a water supply
system
申请号：US40530573申请日：19731011公开号：USB405305I5公开日：19750128
摘要：A control apparatus for a water supply system having a motor operated pumpfor pumping water through a delivery line to one or more valved outlets. The controlapparatus includes a pressure switch responsive to the pressure in the delivery line andoperable at preselected upper and lower pressure limits to respectively stop and startthe pump motor; a main flow control valve which regulates flow from the pump to thedelivery line and having a pressure responsive operator; a pressure regulating pilot valveresponsive to the pressure at the outlet of the main flow control valve for controllingthe pressure on the pressure responsive operator of the main flow control valve toactuate the latter and maintain the pressure in the delivery line substantially constant ata value intermediate the upper and lower pressure limits during normal flow from thedelivery line, a pneumatic pressure tank communicating with the outlet of the main flowcontrol valve, and a bypass for passing a restricted flow to the pressure tank and deliveryline when the main valve is closed to build up the pressure in the tank and delivery line tothe upper pressure limit at which the pressure switch stops the pump motor.
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