Valve diagnostic and performance system

A ball valve for use in industrial pipelines, the valve comprising:

• a valve body;
• an inlet closure piece attached to the valve body;
• an outlet closure piece attached to the valve body, the valve body, the inlet closure piece, and the outlet closure piece together defining an interior cavity;
• a ball disposed in the interior cavity, the ball defining a bore extending through the ball;
• a valve seat adjacent the ball;
• a first strain sensor mounted on the inlet closure piece;
• a second strain sensor mounted on the outlet closure piece;
• a seat misalignment sensor system comprising a ring sensor incorporated in a closure piece body of the outlet closure piece and a magnetized insert ring disposed in the valve seat;
• and
• an electronic controller system in communication with the first strain sensor and the second strain sensor, the electronic control system configured:
• to estimate a position of a pig passing through the valve by comparing an arrival time of the pig at the inlet closure piece and the outlet closure piece based on signals from the first strain sensor and the second strain sensor;
• and
• to identify valve seat misalignment based on signals from the ring sensor.