Patent ID: 8517335
Filing Date: 2013-08-27
Classification: F15B,Y10T

Abstract:
1. A valve positioner system comprising: a transducer including a first type output port connectible to a valve actuator and a second type input port receptive to a valve position signal of a second type input, the transducer generates on the first type output port at a given instant a quantified value of a first type output that is proportional to the valve position signal, a variable position of the valve actuator over a predetermined positional range being directly set in correspondence with the quantified value of the first type output at the given instant; a monitoring circuit, a pilot activation signal being generated thereby while predefined conditions are met; a primary piloted valve in communication with the monitoring circuit, the primary piloted valve having a first position in absence of the pilot activation signal; and a first valve coupled to the primary piloted valve, the first valve having a first position correspondingly linked in a dependent relationship to the first position of the primary piloted valve; wherein the first type output port of the transducer is disconnected from the valve actuator with the valve actuator being maintained in a static position based upon an obstruction of the first valve in the first position.