An RTO switching valve fault can reduce heat recovery, increase VOC slip or stop the oxidizer through a safety interlock. Start with the operating trend and valve sequence before replacing the actuator or seal.
Typical RTO Valve Failure Symptoms
- Valve does not reach the commanded position
- High leakage or unexpected temperature profile
- Slow or incomplete switching cycle
- Position feedback does not agree with the mechanical position
- Repeated actuator, limit-switch or interlock alarms
Inspection Data
Record valve size, actuator type, cycle time, temperature, pressure, leakage symptoms, limit-switch status, air supply and alarm history. Related: RTO switching valves, valve maintenance and industrial RTO systems.
