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The RBVS Retrofit Ball Valve Switch fits most ball valves, including those installed on back-flow preventers and alarm trim lines of dry , alarm , and deluge sprinkler valves . This unit offers an efficient method for detecting valve status: it operates when the ball valve handle is moved from its normal position, activating the switch. The RBVS does not track the position of the handle or the ball itself, but instead uses a spring-loaded actuator that contacts the valve handle. If the handle is moved from the normal position, the actuator extends to the tripped position, triggering the switch
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