How to silence compressed air blasts
 

I started using a compressed air dryer. This dryer, as part of the
operation, opens a valve every minute or so for a couple of seconds.

(it is my strong opinion that I should try to find a way to make it do
so less often, but I digress).

This valve opening produces a very annoying noisy blast of air. To
combat this, I routed the polyethylene tubing to the outside of the
building, by drilling a hole in the masonry.

This "resolved" the problem by moving the blast from the inside to the
outside. The outside is the back of the building and faces the
railroad. So it is not bad. But, I would like those blasts to be
quieter on the outside also. What can I do, realistically, to silence
them?

i

How to silence compressed air blasts
 

"Ignoramus24985" wrote in message
...
I started using a compressed air dryer. This dryer, as part of the
operation, opens a valve every minute or so for a couple of seconds.

(it is my strong opinion that I should try to find a way to make it do
so less often, but I digress).

This valve opening produces a very annoying noisy blast of air. To
combat this, I routed the polyethylene tubing to the outside of the
building, by drilling a hole in the masonry.

This "resolved" the problem by moving the blast from the inside to the
outside. The outside is the back of the building and faces the
railroad. So it is not bad. But, I would like those blasts to be
quieter on the outside also. What can I do, realistically, to silence
them?

i

One or two of these will work:

http://www.ebay.com/itm/SMC-AN302-03...em2326d1 2626

Best Regards
Tom.

How to silence compressed air blasts
 

Ignoramus24985 wrote:
I started using a compressed air dryer. This dryer, as part of the
operation, opens a valve every minute or so for a couple of seconds.

(it is my strong opinion that I should try to find a way to make it do
so less often, but I digress).

This valve opening produces a very annoying noisy blast of air. To
combat this, I routed the polyethylene tubing to the outside of the
building, by drilling a hole in the masonry.

This "resolved" the problem by moving the blast from the inside to the
outside. The outside is the back of the building and faces the
railroad. So it is not bad. But, I would like those blasts to be
quieter on the outside also. What can I do, realistically, to silence
them?

i

Well the cheap way is to simply run the end into a common turbo style
car muffler. (not a straight through type)
That is what we had in both shops.

There should be a sensor that trips the purge cycle based on collected
water. Some use a humidistat as well.


--
Steve W.

How to silence compressed air blasts
 

On Thu, 17 Jan 2013 23:20:48 -0600, Ignoramus24985 wrote:

I started using a compressed air dryer. This dryer, as part of the
operation, opens a valve every minute or so for a couple of seconds.
....
This valve opening produces a very annoying noisy blast of air. To
combat this, I routed the polyethylene tubing to the outside of the
building, by drilling a hole in the masonry.

This "resolved" the problem by moving the blast from the inside to the
outside. The outside is the back of the building and faces the
railroad. So it is not bad. But, I would like those blasts to be
quieter on the outside also. What can I do, realistically, to silence
them?

Routing the blast of air through a baffle box would help. See eg
http://physics.stackexchange.com/questions/28441/can-sound-be-separated-from-air
and http://wiki.diyfaq.org.uk/index.php?title=Baffle_box for some
discussion, and also look for "sound baffle box" (without quotes)
on google images. As shown in some pictures, the surfaces in a
baffle box should have sound-absorbing stuff (eg fiberglass
insulation) on them. The box could be outside, eg a tall thin box
fastened to wall, with exit opening pointed down.

--
jiw

How to silence compressed air blasts
 

On Thu, 17 Jan 2013 23:20:48 -0600, Ignoramus24985
wrote:

I started using a compressed air dryer. This dryer, as part of the
operation, opens a valve every minute or so for a couple of seconds.

(it is my strong opinion that I should try to find a way to make it do
so less often, but I digress).

This valve opening produces a very annoying noisy blast of air. To
combat this, I routed the polyethylene tubing to the outside of the
building, by drilling a hole in the masonry.

This "resolved" the problem by moving the blast from the inside to the
outside. The outside is the back of the building and faces the
railroad. So it is not bad. But, I would like those blasts to be
quieter on the outside also. What can I do, realistically, to silence
them?

i

Put on a muffler of course!

Gunner

The methodology of the left has always been:

1. Lie
2. Repeat the lie as many times as possible
3. Have as many people repeat the lie as often as possible
4. Eventually, the uninformed believe the lie
5. The lie will then be made into some form oflaw
6. Then everyone must conform to the lie

How to silence compressed air blasts
 

On Fri, 18 Jan 2013 02:09:43 -0500, "Steve W."
wrote:

Ignoramus24985 wrote:
I started using a compressed air dryer. This dryer, as part of the
operation, opens a valve every minute or so for a couple of seconds.

(it is my strong opinion that I should try to find a way to make it do
so less often, but I digress).

This valve opening produces a very annoying noisy blast of air. To
combat this, I routed the polyethylene tubing to the outside of the
building, by drilling a hole in the masonry.

This "resolved" the problem by moving the blast from the inside to the
outside. The outside is the back of the building and faces the
railroad. So it is not bad. But, I would like those blasts to be
quieter on the outside also. What can I do, realistically, to silence
them?

i

Well the cheap way is to simply run the end into a common turbo style
car muffler. (not a straight through type)
That is what we had in both shops.

There should be a sensor that trips the purge cycle based on collected
water. Some use a humidistat as well.

Most use a simple timer.


The methodology of the left has always been:

1. Lie
2. Repeat the lie as many times as possible
3. Have as many people repeat the lie as often as possible
4. Eventually, the uninformed believe the lie
5. The lie will then be made into some form oflaw
6. Then everyone must conform to the lie

How to silence compressed air blasts
 

"Howard Beal" fired this volley in
:


One or two of these will work:

http://www.ebay.com/itm/SMC-AN302-03...50975096358?pt
=LH_DefaultDomain_0&hash=item2326d12626

Best Regards
Tom.

That _style_ will work, but those are not large enough mufflers to serve
the high pressure lines he's got.

Those are better as cylinder relief mufflers. Relatively low volume,
relatively low pressure.

For point of reference, one about the size of the muffler on a small lawn
mower would be about right -- say about 2" diameter and 5-6" long.

Common as dirt -- McMaster, Bailey, MSC, Adams Air... just about any
pneumatic/hydraulic supplier has 'em.

LLoyd

How to silence compressed air blasts
 

"Ignoramus24985" wrote in
message ...

This valve opening produces a very annoying noisy blast of air.

i

Perhaps a pipe-threaded lawnmower muffler would help?

I found a bin of air exhaust silencers similar to this in a
second-hand store and use one on my vacuum pump:
http://www.amazon.com/Amico-Plastic-.../dp/B00A7629II
The porous material inside resembles that used on chainsaw intake
filters. The thread is more likely 1/4" NPT than 4".

I just tried it. While it doesn't "silence" the loud pump outlet it's
quite effective for the price. It drops the sound level from 92 to
82dB and removes the annoying buzz from the vanes.
jsw

How to silence compressed air blasts
 

On Thu, 17 Jan 2013 23:20:48 -0600, Ignoramus24985
wrote:

I started using a compressed air dryer. This dryer, as part of the
operation, opens a valve every minute or so for a couple of seconds.

(it is my strong opinion that I should try to find a way to make it do
so less often, but I digress).

This valve opening produces a very annoying noisy blast of air. To
combat this, I routed the polyethylene tubing to the outside of the
building, by drilling a hole in the masonry.

This "resolved" the problem by moving the blast from the inside to the
outside. The outside is the back of the building and faces the
railroad. So it is not bad. But, I would like those blasts to be
quieter on the outside also. What can I do, realistically, to silence
them?

i
Run the blast through a tapered cone, up to about 2 or 3 inch
diameter, and run that (enlarged) pipe up above roof level and
discharge across the roof. The lowered velocity will decrease the
noise significantly, the larger pipe will lower the pitch, and the
height will dispurse the sound.(and attenuate it)

How to silence compressed air blasts
 

On Jan 18, 12:20*am, Ignoramus24985 ignoramus24...@NOSPAM.
24985.invalid wrote:
I started using a compressed air dryer. This dryer, as part of the
operation, opens a valve every minute or so for a couple of seconds.

(it is my strong opinion that I should try to find a way to make it do
so less often, but I digress).

This valve opening produces a very annoying noisy blast of air. To
combat this, I routed the polyethylene tubing to the outside of the
building, by drilling a hole in the masonry.

This "resolved" the problem by moving the blast from the inside to the
outside. The outside is the back of the building and faces the
railroad. So it is not bad. But, I would like those blasts to be
quieter on the outside also. What can I do, realistically, to silence
them?

i

I would try routing the blast of air into a 30 lb propane tank with a
tee on the tank so that the inlet has no restriction but have a valve
on outlet that lets the air out slowly. The tank needs to be mounted
so water does not accumulate in the tank.


Dan