Automatic-valve position, sequence, leakage and backwash anomalies
Use this when automatic-valve position, sequence, leakage and backwash anomalies is observed but the cause remains unclear. The diagnostic checks measurement and sampling, operating changes, issue location, and key evidence before suggesting likely causes and the next useful check.
First time here? Start with this
You do not need every data point before you begin
The system asks one discriminating question at a time and updates the candidate causes on the right. Answer from current facts; choose unknown or defer a question when the evidence is not available.
- 1
Confirm the issue
Check whether the symptom is reproducible and whether the measurement or observation is reliable.
- 2
Narrow the causes
Continue through operating changes, issue location, and available inspection results.
- 3
Read the live result
Candidate causes, support, counter-evidence, conflicts, and next actions update as you answer.
This tool analyzes information you already have. It does not insert a safety screen or use safety status to stop the diagnosis. If an alarm, leak, or injury is happening now, follow the site emergency procedure directly.
Automatic troubleshooting · Selections are not uploaded
Only one question is shown at a time. Answer from current facts or defer an unknown item. Possible causes and next checks update on the right as you answer.
- 1Data validity
- 2Operating changes
- 3Issue location
- 4Further confirmation
Question progress
0/33
- Answered
- 0
- To confirm
- 33
- Clues found
- 0
Load a test scenario
Next question
Phase 1 · Data validity
Do the valve, actuator, accessories, flow direction, valve number, and service match drawings/field?
The system asks the question most useful for separating possible causes. Unknown or deferred items are not treated as the opposite conclusion.
I have more test or inspection resultsOptionalAdd laboratory analysis, normalized calculations, or checks completed by trained personnel when available. These fields are optional.
View rule sources (17)Standards, regulations, OEM material, and peer-reviewed literature used to audit the diagnostic logic. You do not need to read them before starting.
Each rule cites material directly relevant to its judgment. Current OEM and site procedures remain controlling.
- A-international-standard-current · IEC · 2023IEC 60534-1:2023 Industrial-process control valves — Terminology and general considerations
- A-international-standard-current · IEC · 2021IEC 60534-4:2021 Industrial-process control valves — Inspection and routine testing
- A-international-standard-current · IEC · 2011IEC 60534-2-1:2011 Flow capacity — Sizing equations under installed conditions
- A-international-standard-current · IEC · 2007IEC 60534-9:2007 Test procedure for response measurements from step inputs
- A-international-safety-guidance-current · IEC · 2018IEC TR 61511-0:2018 Functional safety for the process industry
- A-industry-standard-current · ISA · 2026ISA-75 Series of Standards — Control Valves
- A-industry-standard · ISA · 2006ANSI/ISA-75.26.01-2006 Control Valve Diagnostic Data Acquisition and Reporting
- A-industry-technical-report-current · ISA · 2024ISA-TR75.25.02-2024 Control Valve Response Measurement from Step Inputs
- A-industry-standard-current · ISA · 2023ANSI/ISA-106.00.01-2023 Procedure Automation for Continuous Process Operations
- A-industry-standard-catalog-current · AWWA · 2026AWWA Standards List — Valves and Actuators
- A-international-standard-current · ISO · 2026ISO 5210:2026 Industrial valves — Multi-turn actuator attachments
- A-international-standard-current · ISO · 2026ISO 5211:2026 Industrial valves — Part-turn actuator attachments
- A-government-guidance · US EPA · 2020Guidance Manual for Compliance with the Surface Water Treatment Rules: Turbidity Provisions
- A-government-regulatory-guidance-current · US EPA · 2025Filter Backwash Recycling Rule Documents
- A-government-design-manual · US EPA · 2006Design Manual: Removal of Arsenic from Drinking Water by Iron Removal Processes
- A-government-safety-current · US OSHA · 2026Control of Hazardous Energy (Lockout/Tagout)
- B-oem-engineering-handbook · Emerson Fisher · 2014Fisher Control Valve Handbook, Fifth Edition