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| new spray booth and down draft table http://mowrystrings.luthiersforum.com/forum/viewtopic.php?f=10101&t=53037 |
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| Author: | bluescreek [ Tue Mar 24, 2020 8:24 am ] |
| Post subject: | new spray booth and down draft table |
been busy since the shut down wanted to do this a long time Now I can spray a body with less running and fumes . Just ordered a Fuji semi pro 2 turbine hvlp to replace my old hvlp set up https://www.youtube.com/watch?v=escxSMDoC5g |
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| Author: | Colin North [ Tue Mar 24, 2020 9:10 am ] |
| Post subject: | Re: new spray booth and down draft table |
Looks like a fine setup John. |
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| Author: | Ernie Kleinman [ Tue Mar 24, 2020 11:47 am ] |
| Post subject: | Re: new spray booth and down draft table |
Vy slick , an cool but when the guitar is done , does it have a rotisserie flavour ? |
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| Author: | oatesguitars [ Wed Mar 25, 2020 7:53 am ] |
| Post subject: | Re: new spray booth and down draft table |
That looks great. Where did you get a motor that turns so slowly? I would like to buy one myself. |
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| Author: | bluescreek [ Wed Mar 25, 2020 8:22 am ] |
| Post subject: | Re: new spray booth and down draft table |
this is what I am using https://www.amazon.com/Universal-Replac ... 59&sr=8-31 |
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| Author: | jfmckenna [ Wed Mar 25, 2020 8:35 am ] |
| Post subject: | Re: new spray booth and down draft table |
Very nice indeed. |
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| Author: | banjopicks [ Thu Mar 26, 2020 9:04 am ] |
| Post subject: | Re: new spray booth and down draft table |
Love this!!! Moving into a new house soon and I'll be using this idea for my booth. Thanks for sharing it John. |
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| Author: | SnowManSnow [ Thu Mar 26, 2020 9:20 am ] |
| Post subject: | Re: new spray booth and down draft table |
bluescreek wrote: been busy since the shut down wanted to do this a long time Now I can spray a body with less running and fumes . Just ordered a Fuji semi pro 2 turbine hvlp to replace my old hvlp set up https://www.youtube.com/watch?v=escxSMDoC5g Dude that’s awesome!!!! Sent from my iPhone using Tapatalk |
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| Author: | James Orr [ Thu Mar 26, 2020 10:22 am ] |
| Post subject: | Re: new spray booth and down draft table |
bluescreek wrote: this is what I am using https://www.amazon.com/Universal-Replac ... 59&sr=8-31 Thanks, John. The description in the link says it uses a 5/16" square rotisserie spit rod. Is that what you're using to hold the guitar? How did you mount the hardware that holds the guitar to the rod? Inquiring minds want to know. 
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| Author: | bluescreek [ Thu Mar 26, 2020 11:07 am ] |
| Post subject: | Re: new spray booth and down draft table |
I tossed the square rod took a 5/16 carriage bolt squared that and JB welded it into the rotisserie I have a hanger that screws into the neck block . THis is much more rigid than the square stock. I took square tube put a 1/4 20 thumb screw and welded a plate that screws in the neck block and can slip in and off |
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| Author: | Joe Beaver [ Sat Mar 28, 2020 2:12 pm ] |
| Post subject: | Re: new spray booth and down draft table |
That is an excellent setup! One question, what do you use for the fan? |
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| Author: | bluescreek [ Sat Mar 28, 2020 6:01 pm ] |
| Post subject: | Re: new spray booth and down draft table |
I am using a 8 in duct fan with an induction motor. it moved 460 cfm and with induction no sparks. There is plenty of air exchange. I was spraying and took of my mask and there was no odor till I turned off my fan. The air curtain design works well. |
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| Author: | Joe Beaver [ Sun Mar 29, 2020 1:03 pm ] |
| Post subject: | Re: new spray booth and down draft table |
That is such a clever design. Do you use it for Nitro? |
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| Author: | Barry Daniels [ Sun Mar 29, 2020 3:37 pm ] |
| Post subject: | Re: new spray booth and down draft table |
John, are you saying the duct fan motor is explosion proof? |
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| Author: | bluescreek [ Mon Mar 30, 2020 4:40 pm ] |
| Post subject: | Re: new spray booth and down draft table |
yes I use this for nitro. Yes it is explosion proof as there are no sparks as there is in a brushed motor. Also there is a fresh air factor so the fumes cannot build up. You can literally spray nitro right into the fan . I even sprayed gasoline in it. it won't burn. Induction motors don't use an electric contact so no spark no flame |
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| Author: | Barry Daniels [ Tue Mar 31, 2020 10:03 am ] |
| Post subject: | Re: new spray booth and down draft table |
It might be acceptable to call it intrinsically safe, but I wouldn't go to explosion proof. That would mean that it is built to actually contain an explosion. |
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| Author: | bluescreek [ Tue Mar 31, 2020 11:32 am ] |
| Post subject: | Re: new spray booth and down draft table |
lets say the fire risk is very low |
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| Author: | Ken Lewis [ Tue Mar 31, 2020 12:09 pm ] |
| Post subject: | Re: new spray booth and down draft table |
Barry Daniels wrote: It might be acceptable to call it intrinsically safe, but I wouldn't go to explosion proof. That would mean that it is built to actually contain an explosion. My thinking, being wrong is always an option tho, is that in motor classification explosion proof means that it can't cause or contribute to spark ignition leading to an explosion. For example the motors at gas station pumps are no doubt classified as explosion proof. I have a couple of them on homebuilt tools and they are totally enclosed and sealed so that no vapors can enter. |
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| Author: | bluescreek [ Tue Mar 31, 2020 5:51 pm ] |
| Post subject: | Re: new spray booth and down draft table |
All the explosion proof fans I see keep the fumes from any chance of getting near a spark I do not think they will hold back a real explosion. There are a few things you need to cause the explosion. It is not as easy as one may think as it takes fumes in proper concentration to air , a heat source before it can ignite . Most flare ups are minor but never let your guard down. Keep dust and fuel away. |
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| Author: | Barry Daniels [ Tue Mar 31, 2020 6:05 pm ] |
| Post subject: | Re: new spray booth and down draft table |
There are several different explosion proof classifications, but the main ones actually mean that an explosion can occur inside the electrical enclosure and it is strong enough to not fly apart. It also largely keeps vapors out but a leaky gasket is not an uncommon occurrence. So the extra strong enclosures are there to keep it from becoming a bomb. I used to design some electrical systems for gas stations and had to be very familiar with the requirements. |
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| Author: | bluescreek [ Thu Apr 02, 2020 12:48 pm ] |
| Post subject: | Re: new spray booth and down draft table |
designed and made the VOC vent. Using a 4 in duct fan into a 4 in PVC pipe with 1/2 in holes spaced 4 in apart. It is 55 in long. 2 holes at the far end. Just got finished spraying a body and let the VOC vent run for 15 min. Fumes are at a minimum. I can smell a little of lacquer but it is very mild. I will be playing a bit more with this but I do like the way it removes fumes and gases. My shed is 12 by 20 . I open the room window 4 in . This gives me 96 sq in of air. this is about 1 1/3 more than the duct diameter. I also have a 4 in hole to vent in the booth. the key is to get outside fresh air to keep the concentration of fumes to a minimum. Will post more in the near future To all be safe hide like a moonshiner. |
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| Author: | doncaparker [ Thu Apr 02, 2020 6:57 pm ] |
| Post subject: | Re: new spray booth and down draft table |
bluescreek wrote: hide like a moonshiner. G** D*** Revenuers!!! |
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| Author: | Barry Daniels [ Thu Apr 02, 2020 8:53 pm ] |
| Post subject: | Re: new spray booth and down draft table |
4" is very small for an exhaust. Most commercial units have up to a 16" diameter exhaust. My spray booth is necked down to 14" in order to go between my joists and rafters. |
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| Author: | bluescreek [ Fri Apr 03, 2020 5:50 am ] |
| Post subject: | Re: new spray booth and down draft table |
4 inches does the job this pulls the heavy gases off the floor lever I have 3 vents 8 in for the table 2 4 inchers one floor level the other about waist high. After spraying the 8 in turns off at 5 min the 2 4's keep pulling fumes. Works well it is all about pressure control and air flow. 14 can pull all the ambient air out of a building and you loose rh and temp control. With this design this allows the fumes to be controlled and vented at a rate that allows me control of the rooms temp and rh while dispersing gases |
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| Author: | Barry Daniels [ Fri Apr 03, 2020 9:58 am ] |
| Post subject: | Re: new spray booth and down draft table |
John, sounds good. The difference for me is that I do not have a small spray room like yours. Wish I did. My booth is open to the shop so I have to move a lot of air to clear the shop of any overspray that is not initially collected by the booth. |
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