Top 5 potential hazards of pressurised heating systems

Top 5 Defects – Pressurised heating systems.

  1. Expansion vessel low pressure– A common occurrence which can cause the heating system to operate inefficiently and in some circumstances cause air to be drawn into the heating system which may bring on the internal corrosion of susceptible components.
  2. Expansion vessel high pressure– Excessive pressure may cause the heating system to operate at the upper limits of its design capability and in certain circumstances cause the safety valve to lift as the heating system warms up.
  3. Damaged schrader valve– A damaged schrader valve would not allow the expansion vessel to be recharged. The replacement of the valve is quite straight forward but would mean that the heating system is shut down.
  4. No clear indication of the safe working pressure– The safe working pressure has to be marked on the expansion vessel to aid the system operator, service technicians and inspection engineer during the course of the duties.
  5. Damaged internal bladder– A damaged internal bladder would mean that the heating system had potentially lost its thermal expansion capability. In this situation excessive pressures can be experienced and in turn cause the safety valve(s) to lift discharging hot water. The replacement of the bladder is time consuming and potentially expensive and would mean that the heating system is shut down. Regular checks by Thurra’s experienced engineers would give early indication of a deterioration in the bladder operation.

Thurra’s team of experienced engineers will assess the condition of pressurised heating systems advising on the condition of the equipment and whether or not any remedial action is required to ensure that they continue to operate safely and effectively. A formal written report will be sent which should be kept as confirmation of the equipment’s status and if required it should be presented to your maintenance contractor.

If you require advice or help on any of the above, please speak to your Insurance Broker who will be happy to arrange a call from Thurra for technical advice, or a visit by an experienced engineer.

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