Repair the circuit board of the Rotork electric valve
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The customer sent in the circuit board of a Rotork electric valve for repair; the model was unknown. Five components on the board were damaged, and there was also a hole in the board. It was found that the damaged components included a current-limiting resistor, a rectifier bridge, an electrolytic capacitor, a 4007 rectifier diode, and a varistor. Additionally, it was discovered that the U-wire of the secondary winding of the toroidal transformer was broken – the winding had been damaged. The transformer’s specifications indicated three primary voltages of 0~380V~400V~415V, with a secondary voltage of 28.3V. A toroidal transformer was ordered online; the damaged components on the board were removed, the carbonized parts of the burnt circuit board were cleared away, and then the five damaged components were reconnected using soldering techniques on the board
It’s the first time I’m using images; haha, it looks a bit weird – I used too much
From now on, repair examples will be posted from time to time
There is a valve for which the torque is constantly exceeding the allowed limit; the handwheel turns very easily. I suspect there is a problem with the Rotork Q102 torque plate. Could you advise me on any bypass methods or repair approaches?