'POWER FLUSHING', 'JET FLUSHING' & 'HARD FLUSHING'
are all expressions used (in the heating trade over
many years) to denote the process by which heating
systems are forcibly cleansed using water at high
velocity, but low pressure, so that no physical damage
is caused to the system. The process can be made even
more effective with the addition of powerful cleansing
and mobilising agents.
The
objective is to restore systems with circulation and
boiler noise problems (caused by sludge and corrosion
deposits) to optimum operation. Power flushing removes
these deposits and the problems that they cause.
Power flushing, is also an excellent way to
pre-commission clean new heating systems, to remove
excess flux, swarf and other debris, and the grease
and oil used to prevent rusting of components before
use.
It
is prudent to power flush a heating system immediately
before fitting a new boiler to an existing system to
prevent possible future problems. Many systems are
found to contain corrosion and sludge, even if no flow
problems have yet shown themselves.
Existing debris is often mobilised by alterations to
the system/piping and the increased efficiency of the
new boiler, and may then accumulate in the boiler heat
exchanger, causing noisy operation, reduced efficiency
and, in extreme circumstances, failure of the boiler.
The high efficiency and compactness of modern boilers,
developed to minimise fuel costs and pollution, means
that they are more susceptible to problems caused by
debris in the system water.
|