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air supplied respirator problems


 
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td466
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PostPosted: Sat Jul 21, 2018 5:35 am    Post subject: air supplied respirator problems Reply to specific post Reply with quote

HI I just purchased a SAS 1/4 hp full face mask for a one man, operators manual says the combined maximum length of breathing air hose and inlet hose cannot exceed 300'.

The way my shop is set up this is what I have tried: I have a 100' air supply line this is from pump to my mask, and 50' inlet hose from outside (clean air) to the pump. I am not getting enough air to my mask, it makes it difficult to breath after a while.

I have tried using 100' air supply line and 25' of inlet, this works , but depending on the direction of the wind I can get paint fumes lingering around the inlet.

Anyone have any ideas how I should proceed?

Thanks
 
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David G
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PostPosted: Sat Jul 21, 2018 6:14 am    Post subject: Re: air supplied respirator problems Reply to specific post Reply with quote

Put your compressor outside, it is easier to blow than to suck.

I think 100' of hose is plenty.
 
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showcrop
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PostPosted: Sat Jul 21, 2018 7:31 am    Post subject: Re: air supplied respirator problems Reply to specific post Reply with quote


Use an adapter to make your inlet tube larger diameter. If you were to use something an inch and a half or larger it would make 25 feet work like one foot. Small diameter kills flow much more on the inlet side than on the outlet.
 
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td466
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PostPosted: Sat Jul 21, 2018 9:38 am    Post subject: Re: air supplied respirator problems Reply to specific post Reply with quote

I am using the special intake extension hose offered by the pump supplier, it has a liner in it that gives off no harmful vapors, what can I use that will be safe that wont give off gasses?
 
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td466
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PostPosted: Sat Jul 21, 2018 9:39 am    Post subject: Re: air supplied respirator problems Reply to specific post Reply with quote

David, would it make a difference if I had a 3/4 hp pump?
 
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Stephen Newell
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PostPosted: Sat Jul 21, 2018 2:24 pm    Post subject: Re: air supplied respirator problems Reply to specific post Reply with quote

I think it would be better to talk to the manufacturer. They would know better if there was something wrong with how the unit was set up or if there was something wrong with the compressor. If the compressor isn't working right it's only going to get worse. By then the warranty may be out.
 
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showcrop
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PostPosted: Sat Jul 21, 2018 3:31 pm    Post subject: Re: air supplied respirator problems Reply to specific post Reply with quote

CVPost-td466 wrote:
(quoted from post at 10:38:27 07/21/1Cool I am using the special intake extension hose offered by the pump supplier, it has a liner in it that gives off no harmful vapors, what can I use that will be safe that wont give off gasses?


td what size is that extension hose? if it is less than 1.5 inch you will need to go bigger. Stainless steel would of course be safe but extremely spendy, unless you got used. You could try a dairy supply. 1.5 inch piping is very common in dairy.
 
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td466
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PostPosted: Sun Jul 22, 2018 3:21 pm    Post subject: Re: air supplied respirator problems Reply to specific post Reply with quote

the hose is 1.5"
 
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44 massey
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PostPosted: Sun Jul 22, 2018 4:22 pm    Post subject: Re: air supplied respirator problems Reply to specific post Reply with quote

Not sure which system u have, with my Breathecool system the compressor sets outside and only hose it has is the 1 1/2 hose from compressor to respirator! I originally started with the hood but have opted to go the 1/2 mask respirator!!! I believe with one Man U I can go up to 300 ft, most I have used is 150!!! I have the air flow and with the 1/2 mask set to little over 1/2 of full air flow!!! Works excellent!!!!
 
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David G
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PostPosted: Mon Jul 23, 2018 6:52 am    Post subject: Re: air supplied respirator problems Reply to specific post Reply with quote

I think I have the 100' breathe cool hose.

In the summer, I lay a coil of about 20' in a bath of ice water, helps a lot.
 
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