What are the two main types of boilers used in low pressure systems?

The two main types of boilers used in low pressure systems are fire-tube and water-tube boilers. Fire-tube boilers operate by having hot gases pass through tubes that are surrounded by water. This design allows for efficient heat transfer, making fire-tube boilers suitable for low-pressure applications. They are commonly used because they are relatively simple in design and operation, making them a reliable choice for many heating requirements.

On the other hand, water-tube boilers feature tubes filled with water that are heated by hot gases. This configuration allows for a greater surface area for heat transfer, and consequently, they can handle higher pressures and produce steam more efficiently. However, they are also found in low pressure systems where their design can lead to quicker response times in temperature changes.

Together, these two types of boilers meet the varying needs of low-pressure steam production, each with its unique benefits.