Vacuum Blower Silencers
There are three types of vacuum blowers for that Labideal Silencers manufactures silencers.
They are Dry Rotary Positive Displacement Blowers,
Water sealed Rotary Positive Displacement Blowers,
and Liquid Ring Vacuum pumps.
Each pump has its own unique application and requires a different style of silencer. Using the wrong style of vacuum blower silencer can reduce the efficiency of the vacuum blower. And they will result in unsatisfactory noise control.
Dry Vacuum Rotary PD Blowers
For many years, people limit dry vacuum blowers to the depth of vacuum they could achieve.
With Rotary Positive Displacement Blowers (Rotary PD Blowers) , people dissipate the heat generated.
And the heat is within the blower by transfer it to the air being passed through it.
As the level of vacuum becomes greater there is less and less air actually flowing to help achieve this heat transfer.
At a given level the heat within the blower will rise to a point where it is damaging to the blower.
With the addition of jet ports to inject cooling air into the discharge side of the blower.
We can transfer the heat and achieve deeper vacuum levels. With jet port blowers, we require a silencer on the jet port and on the blower discharge.
We require proper sizing of the discharge silencer to insure a standing noise wave is not generated.
This standing wave can travel long distances and create objectionable noise levels in the surrounding environment.
Water Sealed Rotary PD Blowers:
Another method of cooling the blower during operation is to inject water into the blower inlet.
The water seals the blower allowing deeper vacuum levels and absorbs much of the generated heat.
Different silencers are available to remove either 95% or 99% of the free water contained in the discharge air stream.
Water Ring Vacuum Pumps
Water Ring Vacuum Pumps use a column of water to create the vacuum necessary for the application.
Water Ring Vacuum Pumps use multiple vanes to creat the vacuum necessary for the application.
They are particularly suited for wet applications where there is water already present in the system prior to the pump.
In these cases, we require a separator silencer to the pumps inlet to remove the entrained water. We also require a similar separator on the discharge to remove and recirculate the water. We use the water to affect the vacuum within the pump, too.
Labideal Silencers manufactures three different models of separator silencers for the Water Ring Vacuum Pumps.
Although all models separate 99% of all free water in the discharge air stream. Each model has a different attenuation capability, too.
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