Patent ID: 8905371

Claim:
A valve signature diagnosis and leak testing device for a control valve, the valve signature diagnosis and leak testing device comprising: a spool valve operatively connected to a pilot valve, the pilot valve being configured to position the spool valve to one of an open position and a closed position, the spool valve including a first control fluid inlet, a first control fluid outlet, and a second control fluid outlet, the first control fluid inlet being fluidly connected to a supply of control fluid and the first control fluid outlet being configured to be connected to a valve actuator; a blocker valve fluidly connected to the second control fluid outlet; and an electrical module operatively connected to the pilot valve, the supply of control fluid, and the blocker valve, the electrical module being capable of sending pulsed electrical signals to the pilot valve and the blocker valve to selectively position the spool valve and the blocker valve to an open or a closed position, wherein the open position of the spool valve fluidly connects the first control fluid inlet to the first control fluid outlet and the closed position of the spool valve fluidly connects the first control fluid outlet to the second control fluid outlet, and the electrical module includes a first pressure sensor communicatively connected to the supply of control fluid.