A boiler silencer is a device
that is especially designed in order to reduce the boiler noise or kettling that
has lately been the most visible symptom of a scaled system. It comes being
compatible with not only all types of boilers but also with all the metals and
materials that are commonly used in systems including aluminum. These devices
are designed to operate in order to reduce the boiler noise and improve the
efficiency level of the heat being transferred to the system. A silencer is a
muzzle device that functions to reduce the sound intensity.
You probably cannot count on boilers to be in the
list of quietest heating appliances so far, but some sounds from your system
can ensure you on the existence of a problem in your unit and that is when you
need to learn on why your boiler is making noise when heating is on. However
there can be different reasons as to why your boiler is producing different
sounds. These noises can include a loud humming noise, banging noise, whistling
noise, or the sound of gurgling, all of which are not a normal boiler sound
produced during the operation of a healthy boiler. While there could be
different reasons for the production of these sounds. We have mentioned some of
the main reasons to this:-
1) Loose components:
One of the most common reasons of
your boiler making noise while operating could be any of the components of your
system might have made its way to loosen. A component when silently vibrates
against the other parts, produces a loud humming sound that needs to be fixed.
Though the fix is simple, yet delaying the repair could cause your boiler to
get even more damaged. Once you are sure about the issue, stat looking for:
brackets- You can try fixing the loosen bracket area with a screw or
of the unit itself- It is highly recommended to go for a professional help in
case you find your system to be vibrating in order to stop the unit from making
panel/compartments- An open panel or compartment in the system can also be a
cause of the sound being produced. While for this, you need to make sure that
all the compartments, panels, and openings are well closed.
2) High pressure:
your boiler is making a really loud noise then you need to look out for the
water pressure of your system. A system operating on a higher pressure can be a
cause, contributing to the loud sound that is being produced.
considerable point in this case is that a normal healthy boiler would never
exceed the pressure limit of 12-15 psi (pounds per square inch). So if your
boiler is operating at a pressure over 15 psi then this could be the reason for
your system to produce that sound.
this is not felt to be like an emergency case, as the modern systems are made
with the pressure relief valves to handle such problems for you. But if the
problem continues for a longer time then you could try turning the water and
heating off, which is believed to help you put the pressure back to the normal
levels. For other high pressure issues it is highly recommended to consider a
3) Circulating pump set too
circulating pump operates to circulate the heated water from the boiler to
radiator and then back to the boiler. If the circulating pump somehow gets set
at a faster speed, then you would witness vibrations and a loud noise.
that is the case then you need to look for the circulating pump of your system,
and check the speed settings. Reduce the speed of the system and see if that
stops the noise.
the sound stops, then leave your system to operate at a lower speed but if this
doesn’t solves the problem or causes any hot water discomfort to your family
then you are highly recommended to consider a professional help in that case.
Ignition- The problem of delayed ignition is quite commonly
found in gas boilers that use pilot lights in contrast to the electronic
ignition systems. When a gas boiler receives the call for heat, the gas valve
opens and releases a small amount of gas into a sealed combustion chamber
through small “jets”. This gas then gets ignited by the pilot light and the jet
flames heat up the heat exchanger. Delayed ignition occurs when the gas that is
sent into the combustion chamber doesn’t immediately ignite. And when that
happens, the gas builds and builds inside the combustion chamber until bang,
creating a mini explosion.
on the other hand, kettling is something which occurs as a result of the lime
scale buildup in the system that eventually creates bubbles and leads to the
occurrence of ‘hot spots’. These hot
spots are what causes loud noise and needs to be treated with a solution in
order to clear the lime scale blockage. However there are a number of other
reasons as well that can cause kettling.
- Gurgling Noise-
If you find your system pressure to be too high then releasing some of the air
out of the system would likely solve the problem of the gurgling sound for you
and put the pressure down to a required level.
- The hot water circulates
between the radiator and the boiler through pipes. Over the time, the air seeps
into the pipes, creating air bubbles which then interfere with the distribution
of water in the pipe and the vessel, thus reducing the efficiency level of your
system and generating huge energy waste which certainly increases your energy
- Bleeding the
system would, therefore, allow a good circulation of hot water in the pipe
lines, and would eventually result into uniform heat diffusion along with a cut
down on your energy bills.
Each of these problems might have a different
solution, there are a couple of things you could do to eliminate these sounds
including bleeding, and re-pressurizing of your system.
Bleeding you boiler system
- Depending on the type of bleed valve in
your system, you need to undo it using a radiator bleed key or a flat
- Now put the boiler system off in order
to allow the air to rise to the top of the radiator and prevent it from
interfering during the process.
- Use a pair of grips to ensure that the
valves at the bottom of your radiator are open in order to allow the water to
flow into the radiator.
- Now loosen the radiator’s bleed valve
with a radiator key or a flathead screwdriver.
- As soon as you loosen the bleed valve,
you will be able to hear hissing sound of the air escaping.
- Once the water begins to come out, you
know that all the air has been released from the radiator. Now tighten the
bleed valve back.
- It is recommended to keep a cloth ready
for any droplets that would come out of the system as soon as the air escapes.
- Now go around each of the radiators in
the house, repeating the process if required.
Re-pressurizing your system
- Close all the vents
getting start with re pressurizing your boiler, check all the bleed valves on
radiators and towel rails to be fully closed.
- Search for the filling loop
most of the boilers, they have the external filling loop that is used to top up
the boiler with water and hence increases the pressure.
soon as you open the filling loop, you will get to see a pressure rise. You can
take a l ook of what is the exact
pressure your boiler needs. Commonly the boilers operate with 1.5 bars.
sure that the filling loop is completely closed. However if it is not closed it
will slowly leak additional water into the boiler. This will increase the
pressure and the boiler will lockout.
You might be wondering about
the boiler silencer how does it work. Let’s have a look to understand the same.
Boiler silencer how does it works
A boiler silencer goes down
and puts a full stop on the formation of the large bubbles which therefore
results into the elimination of any noise coming from the system, thus
enhancing the efficiency level of the heat being transferred to the system.