Vacuum relief device for fluid transfer and circulation systems
First Claim
1. A device for use in a fluid transfer system having a pump which draws water from a reservoir through one or more intake lines each extending from an open end at the reservoir to an intake of the pump;
- said device comprising;
means for sensing one or more operating conditions of the system during operation of the pump;
vacuum pressure relief means for introducing positive pressure into the intake lines of the system to thereby suction at the open ends of the intake lines upon actuation thereof; and
means for actuating said vacuum pressure relief means upon said sensed one or more operating conditions deviating outside of a predetermined normal operational range.
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Accused Products
Abstract
A safety device for use in a fluid transfer and/or circulation system of the type which uses a pump to draw water from a reservoir through one or more intake lines each extending from an open end at the reservoir to the pump intake. The safety device connects to the fluid transfer/circulation system and includes a sensor, a triggering mechanism, and a vacuum breaker. When the pump is operating, the sensor monitors one or more conditions of the system. When one or more of the monitored conditions deviates outside of a normal operational range, as a result of an obstruction of any one or more of the open ends of the intake lines, the triggering mechanism triggers the vacuum breaker to eliminate negative pressure in the system by introducing air from atmosphere into the intake lines, thereby removing suction at the open ends of the intake lines. The safety device may further activate warning devices including audible and visible alarms to indicate that the system has been deactivated.
44 Citations
7 Claims
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1. A device for use in a fluid transfer system having a pump which draws water from a reservoir through one or more intake lines each extending from an open end at the reservoir to an intake of the pump;
said device comprising;
means for sensing one or more operating conditions of the system during operation of the pump;
vacuum pressure relief means for introducing positive pressure into the intake lines of the system to thereby suction at the open ends of the intake lines upon actuation thereof; and
means for actuating said vacuum pressure relief means upon said sensed one or more operating conditions deviating outside of a predetermined normal operational range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
Specification