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Read the following statements about feed water heaters I. Open or contact heaters are also called Deaerator. II. Open or contact heaters constructed to remove non-condensable gases from feed water.

Read the following statements about feed water heaters I. Open or contact heaters are also called Deaerator. II. Open or contact heaters constructed to remove non-condensable gases from feed water. Correct Answer I. and II. are correct

Dissolved gases can cause corrosion inside the boiler so they must be removed from feed water. Feed water heaters are used to heat the feed water by means of bled steam before it is supplied to the boiler. The amount of non-condensable gases decreases with increase in temperature of water in open heaters hence called Deaerator.

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