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Discussion Starter #1
I am looking to install one of Viair's on board air compressor kits that include a 5-gallon tank, 400cc compressor, and 2 air connects on the front and rear of the truck for quick connect tools and tire fill lines. Is there a way to use a air dryer from bendix to keep the tank full all the time with no condensation and without having to constantly climb under the truck to open the petcock drain? Also I want it to have a pressure blow off valve like the big rigs do so when the tank gets to 120 psi it automatically shuts the compressor off and blows off the excess air. ( I love that air brake type of sound lol ) so bottom line..is that possible to rig up?
 

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anything is possible its how much work you wanna do and do you have the resources and knowledge to get it done
 

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You plumb in and wire in a pressure switch to the compressor and output of the line. My viair 444 shuts off at 180 psi and on at 150.

2005 F350 CCLB FX4
 

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Also I want it to have a pressure blow off valve like the big rigs do so when the tank gets to 120 psi it automatically shuts the compressor off and blows off the excess air.
That would be a pressure switch with an unloader. You would have to mount it downstream of the compressor to have any air volume between the switch and compressor head to let off. Most likely it won't be enough to hear it.

You can install a water/oil separator somewhere between the compressor and tank to help keep water out of the tank. Given your location I wouldn't think you'd have enough water in the tank to require "constant" draining.
 

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Discussion Starter #5
That would be a pressure switch with an unloader. You would have to mount it downstream of the compressor to have any air volume between the switch and compressor head to let off. Most likely it won't be enough to hear it.

You can install a water/oil separator somewhere between the compressor and tank to help keep water out of the tank. Given your location I wouldn't think you'd have enough water in the tank to require "constant" draining.
Would the level of audible noise from the "unloader" be greater dependent upon what size compressor I have? For instance, a larger stronger compressor may be capable of pushing more volume of air, therefore creating a stronger psi in the line that might make a louder air release noise from the "unloader" ?
 

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no it wouldn't be make more noise. the noise is gonna come from size of exhaust port. you could find a 12v solenoid valve large enough to make some noise but I think your gonna wind up with more of a headache than its worth
 

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Discussion Starter #8
If you buy a air dryer from bendix does it come with a unloader built into it?
 
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