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HVAC Maintenance

Control Valve (Motorised) Maintenance Checklist

A maintenance checklist for motorised control valves covering actuator testing, valve stroke verification, gland inspection, and BMS signal checks — for HVAC heating and cooling circuit regulation.

What is a control valve maintenance checklist?

A control valve (motorised) maintenance checklist is a structured list of the 10 preventive maintenance tasks — covering visual, functional, cleaning, safety and record-keeping checks — that keep a control valve (motorised) running safely and reliably. It groups routine checks by frequency, from daily inspections to annual servicing, so FM teams and building engineers can plan and evidence preventive maintenance.

Core control valve checks

  • Inspect valve gland for water leaks
  • Verify the valve strokes fully open to fully closed and back
  • Check the associated strainer is clean
  • Confirm the valve is labelled with circuit identification
  • Record valve position, actuator condition, and any remedial work

What is a control valve (motorised)?

A motorised control valve regulates the flow of hot or chilled water through heating and cooling coils in response to signals from a BMS controller or local thermostat. The valve body contains a plug, ball, or butterfly element driven by an electric or pneumatic actuator. Correct valve operation is fundamental to zone temperature control, energy efficiency, and occupant comfort.

Typical Control valve maintenance checklist

A practical starting point for planned preventive maintenance. Always refer to the manufacturer's O&M manual and site-specific requirements.

Visual Checks

  • Inspect valve gland for water leaks
  • Check the actuator is correctly coupled to the valve stem
  • Inspect valve body and connections for corrosion or leaks

Functional Checks

  • Verify the valve strokes fully open to fully closed and back
  • Check actuator responds correctly to the BMS control signal
  • Confirm the valve achieves full shut-off with no pass-by
  • Verify spring-return operation (fail-safe position) if applicable

Cleaning & Housekeeping

  • Check the associated strainer is clean

Safety Checks

  • Confirm the valve is labelled with circuit identification

Record Keeping

  • Record valve position, actuator condition, and any remedial work

Typical maintenance frequency

Suggested intervals for control valve (motorised) maintenance. Actual frequencies should follow manufacturer guidance and site-specific risk assessments.

Quarterly

  • Verify valve operation and BMS signal response
  • Check for leaks at glands

Annually

  • Full stroke test
  • Fail-safe test (spring return valves)
  • Clean strainer
  • Check actuator coupling

Common faults and issues

Issues to be aware of when maintaining control valve (motorised) equipment.

Actuator failure leaving the valve stuck in one position — common cause of zone temperature complaints
Valve gland leaks requiring packing adjustment or replacement
Valve plug or seat wear preventing full shut-off (pass-by)
Actuator decoupled from valve stem — the actuator moves but the valve does not
Strainer upstream blocked, restricting flow regardless of valve position

Safety and compliance notes

Key safety considerations for control valve (motorised) maintenance. This is general guidance only — always follow OEM instructions, statutory requirements, and your organisation's safe systems of work.

Isolate pipework before removing or replacing a valve body — hot water and high-pressure systems can cause burns
Spring-return valves store energy — take care when removing actuators as the valve will snap to its fail-safe position
Ensure fail-safe positions are correct for the system design (e.g., heating valves fail open, cooling valves fail closed)
How PM Assist helps

Managing Control valve documentation with PM Assist

PM Assist helps FM and building operations teams search their O&M manuals and building drawings in seconds. Upload your control valve (motorised) documentation and ask questions like “What are the recommended service intervals?” or “Where are the isolation points?” — and get source-cited answers instantly.

See PM Assist answer questions about a real control valve manual — try the live demo, no signup needed.

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Frequently asked questions

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