AIM/Chassis Tech Discussion - Get Help

Originally posted by GraphicDisorder



I understand that with no head pressure it would not draw 117amps. My point is that in the example I gave that the compressor could lock up in shipped form yes? After all Doug tested a compressor as you would ship it to anyone yes?

Given that in my example I would fill my tank to 200psi, lift the truck, drive, the compressor could then lock up uppon trying to refill yes? Again in shipped form no modification.

In other words your saying that its all fine since after break in it "could" go away, or you could crack one of the bolts to allow head pressure to escape quicker. I dunno just seems like you shouldn't be shipping a 200psi compressor that may lock right away after you fill the first time and try to restart.



OK Brandt... I am clear now.

In Doug's case. we sent him a sealed unit in an unopened box as requested. when you buy a compressor from us, we bench check it for restarts. If it does not restart, we run it for an hour to seat the piston/seal. If it still does not restart, we break it in until it restarts, or we manufacture a slight leak on the head pressure until it restarts.

tx

Originally posted by joemorrow



Originally posted by GraphicDisorder



I understand that with no head pressure it would not draw 117amps. My point is that in the example I gave that the compressor could lock up in shipped form yes? After all Doug tested a compressor as you would ship it to anyone yes?

Given that in my example I would fill my tank to 200psi, lift the truck, drive, the compressor could then lock up uppon trying to refill yes? Again in shipped form no modification.

In other words your saying that its all fine since after break in it "could" go away, or you could crack one of the bolts to allow head pressure to escape quicker. I dunno just seems like you shouldn't be shipping a 200psi compressor that may lock right away after you fill the first time and try to restart.



OK Brandt... I am clear now.

In Doug's case. we sent him a sealed unit in an unopened box as requested. when you buy a compressor from us, we bench check it for restarts. If it does not restart, we run it for an hour to seat the piston/seal. If it still does not restart, we break it in until it restarts, or we manufacture a slight leak on the head pressure until it restarts.

tx

Thats what I was getting at.

Originally posted by DJDAudi0



Thanks for the information Joe!

Almost 99% of industrial compressors run a 'unloader' a small valve built into the pressure switch then when the pressure switch kicks off it will open a small valve to remove the air from the head of the compressor.

This is done to eliminate the strain induced from high pressure restarts.

Is there a way to include a small 'T' fitting and that above valve with the compressor when people purchase the unit?

Also how do you wire in the valve? Is it on all the time when the compressor is off? Or is it on a timed relay?



One lead wires to the hot compressor side, the other to ground. When the compressor shuts off, the valve opens to release pressure.

Thanks

I will loosen the head 'plug' Untill the Compressor is able to restart at 145PSI after a 5 Min pause.

I will then re conduct my flow tests and Post up my results in the review

Thanks for the kind words everyone.

The compressor has well over 35.5 hours of operation under its belt now.

Doug,
I must say that I am overwhelmed at your professionalism, and the objective reviews. The biggest problem was the RESTART issue, which is not an issue on a compressor that does not have as tight of piston tolerance. To me this is a good problem to have, and kicking it around in SSM forces us to come up with the answers and implement them into our customer knowledge bank.

also, your photograpy is 2nd to none. OUTSTANDING. Members should also be aware that WHILE OTHER MANUFACTURES LIKE TO HAVE CUSTOMERS BELIEVE DIFFERENT, a DC compressor is not manufactured for pressures of over 145psi for "normal usage" ..whenever you exceed these pressures, you dramatically shorten the life of the unit, but that is what rebuild kits are for.. and we have them of course.

Thank you, Doug...

and a side note is that i think SSM should allow us to advertise on the forum. It would be good for everyone.

Originally posted by joemorrow



Doug,I must say that I am overwhelmed at your professionalism, and the objective reviews. The biggest problem was the RESTART issue, which is not an issue on a compressor that does not have as tight of piston tolerance. To me this is a good problem to have, and kicking it around in SSM forces us to come up with the answers and implement them into our customer knowledge bank.

also, your photograpy is 2nd to none. OUTSTANDING. Members should also be aware that WHILE OTHER MANUFACTURES LIKE TO HAVE CUSTOMERS BELIEVE DIFFERENT, a DC compressor is not manufactured for pressures of over 145psi for "normal usage" ..whenever you exceed these pressures, you dramatically shorten the life of the unit, but that is what rebuild kits are for.. and we have them of course.

Thank you, Doug...

and a side note is that i think SSM should allow us to advertise on the forum. It would be good for everyone.

I am happy to have helped as always.Again thanks for the kind words.

There is a few weeks for testing on each compressor, so keep an eye out for the DC7000 Review soon.

hey joe i just sent you a email about getting some parts for a couple of your sanden and dc compressors.

glad to see you are trying to get alot of issues worked out on the forums.


and of course doug does a great job as always!

thanks- kris dye

Originally posted by draggingbody



hey joe i just sent you a email about getting some parts for a couple of your sanden and dc compressors.

glad to see you are trying to get alot of issues worked out on the forums.

and of course doug does a great job as always!

thanks- kris dyeKris,I emailed you that I would get back to you in the morning.

tx

Hey Joe, an easy/cheap fix to that compressor issue is an unloader check valve. I used one of these on my york and it would release pressure between the check valve and the head when the cfm dropped below a certain point. IT did this to ease the restart of the compressor and cause less wear and tear. The one I used was called the load genie unloading check valve and I scooped it up from MSC.


This may be something that you want to incorporate into the design because lets say you break in a compressor and all is well but a year or two from now it needs to be rebuilt for whatever reason. If the compressor is now sealed up again like it was from the factory your back with the original problem.

Originally posted by Low_SST



Hey Joe, an easy/cheap fix to that compressor issue is an unloader check valve. I used one of these on my york and it would release pressure between the check valve and the head when the cfm dropped below a certain point. IT did this to ease the restart of the compressor and cause less wear and tear. The one I used was called the load genie unloading check valve and I scooped it up from MSC.

This may be something that you want to incorporate into the design because lets say you break in a compressor and all is well but a year or two from now it needs to be rebuilt for whatever reason. If the compressor is now sealed up again like it was from the factory your back with the original problem.

Thank you Joe. I am looking into MSC