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Degassing Systems
HyVac routinely gets requests for designing and or supplying parts for
degassing systems using a vacuum pump to degas the end product. Typically
the customers are degassing everything from toothpaste to water samples.
We do large systems and small systems. Before we can get too much down
the road toward pricing things for the customer we typically need the
following information to help you. The answers often dictate how we
design the system or even decide on what pumps to consider for the
application involved.
HyVac can put together most or all of the parts for small degassing
systems. These can be accomplished using bell jars, bell jar bases,
pumps and fittings. We also have an off the shelf product that we
sell as a cold trap that can be used as a degassing chamber. If you
are looking to degas small amounts of epoxies, silicones, RTV rubbers,
jewelry casting or whatever then we can help you set up a system for this
procedure.
These systems typically can be pumped using one of our single stage
vacuum pumps. Before you call some information regarding your system
would be of help. Technical information on the types of materials to
be degassed should be ready to discuss. A copy of MSDS sheets for
the compounds will help us determine if there are problem solvents or
other materials involved in your processing that need some kind of
trapping.
First off what is
being degassed?
If it is a light
viscosity product then the air can sometimes come out at higher pressures
but depends again on customer desires but we maybe can decide on less
expensive pumps or components depending on the answer. Typically with RTV
rubbers, heavy viscosity products, sealants and such we need to hit these
mixes with a pretty decent vacuum pressure to get all the air out.
Something like 5 Torr or 29.5" Hg vacuum.
Answers to the
following questions help us, help you, if the answers are available it
will cut down any question marks on performance and making you happy.
1.
Viscosity ?
2.
End vacuum pressure desired?
3.
How Fast? Is there a “pot life”?
4.
Sometimes contaminates from the
item being evacuated can cause issues with the pump or
system, but we many times can advise you on this.
5.
Is there any heat on the system
side or is it at room temperature?
We make pumps and
system components so it helps us to know what we are dealing with.
1.
Is it a big system or a little
system.
Space being evacuated?
2.
Do you need the whole thing or
just parts?
A typical degassing system is generally composed of the following items
some necessary, some are optional.
1. A vacuum pump to degas the system.
Full vacuum or less?
2. A chamber in which to place the item being degassed.
Glass chamber (bell jar) with plate or
Stainless steel chamber of some kind (custom)
3. A gauge (optional) to decide when the process is complete or for
quality control
Can be cheap $50-600 depending on accuracy.
4.
Valves for releasing pressure or
maintaining a specific pressure.
5.
Hose and fittings to hook it all
up.
6.
Our labor if you want a turnkey
assembled and tested system.
As you may have
deduced, there are a number of variables in this decision and if you can
help eliminate some of the questions than we can easily price a system to
you. These are regular items for us we probably have from 2-4 on order as
I write this so again, we do these all the time from Fortune 500 to small
companies. No major complaints yet.
It depends on a
number of things, but a typical lead time might be like 2-4 weeks but
again depends on what is involved off the shelf items or custom things.
On small systems we generally are waiting on bell jars. Sometimes these
things can be expedited.
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