What could be a reason for insufficient steam supply to heating units in a steam system?

Insufficient steam supply to heating units in a steam system can often be attributed to closed valves on the mains. When valves are closed, they physically block the flow of steam through the system, preventing it from reaching the heating units. This can lead to a situation where there is adequate steam generated, but it cannot be delivered to its intended destination due to the obstruction created by the closed valves.

In a properly functioning steam system, all necessary valves should be in the open position to allow steam to travel freely through the piping. If any valves on the mains are inadvertently closed, it would lead to a significant drop in the supply of steam, leading to poor heating performance or even complete lack of heat in the units serviced by that section of the steam system.

While other factors like increased water levels, excessive pipe length, or low pressure in meters could also potentially impact steam flow and efficiency, the direct effect of closed valves represents a straightforward and common reason for an inadequate supply of steam.