just bought this compressor.....need some help

[thod44]

I just bought this compressor for a hundred bucks, but some parts are missing b/c the guy needed them for some other project...

..so i need some help figuring out what i need to get this runnin again.....hope someone can help me out.... there are no tags anywhere on the tank i can find the motor is a GE and the pump says Saylor-beall 705....im trying to figure out how to wire a pressure switch back to the mag starter, hope fully someone can tell me from my pics and also on the bottom of the aftercooler i think its called there is a pipe thread hole guessing a saftey valve went there wondering what Psi i should get for that also....

 

[930dreamer]

Hello, how many hp on the motor?

 

[thod44]

5 hp

 

[thod44]

Anyone know what size valve (how much PSI)should go in aftercooler? or does something else go there? how bout wiring how can i wire my pressure switch in??? any brand switch better than others? what should i look for when buying one?

 

[930dreamer]

Take a look at this.

http://saylor-beall.com/userfiles/file/Manuals/700SeriesManual.pdf

 

[Zrexxer]

Here's how to wire your mag starter in conjunction with a pressure switch:

 

[cnc-me]

Thats a Saylor-Beall. Its made in my home town.

 

[thod44]

just need to know the psi on the saftey valve ......cant find info about it anywhere...

 

[930dreamer]

Just thinking mine are 175psi? Not 100% sure on that. My compressor kicks off at 160 psi.

 

[Beaumont67]

thod44 - I was spring cleaning my garage today, and had a chance to look at my 1985 horizontal 2-stage/5HP compressor tank metal tag.
- mine is a "Manchester" and yours might be to ??
- I have added a web link & pic. for your review / Manchester is a large company mfg. certified tanks:
http://www.esacompressor.com/manchester.shtml#m7

P.S. - $100 is a real steal...nice job

Zrexxer - great wiring diagram.



------------------------------------------------
Beaumont { :>)) www.petperfectexpress.com
1965 Malibu S/S, 1966 Beaumont Custom original paint, 1967 Beaumont Custom, 1967 Beaumont Custom original paint, 1967 Beaumont 396-350HP Sport Deluxe M21-411's - SOLD 1970 Judge

 

[W-Cummins]

If you looking at the bottom of the after cooler it's probably the point to attach the pump output to the tank ( I can't see for sure if there is one coming off the fitting on the back side)

William...

 

[thod44]

the output for the tank is on the other side of the head ......pics on saylor-beall's website shows a safety blowoff valve....just cant find out what the pressure should be dont want to put a 200 if it calls for a 175 for example dont know if it would matter or not.....and as for my mag starter it shows i should have two red wires from the factory on there but there is only one red wire where it looks like the factory put it there and there are two wres that look like they must have been wired to the pressure switch but just have wire nuts on them....thanks for the help so far guys

 

[ridgwel]

The safety relief valve protects the tank too. Make sure that the tank can handle the pressure....check out the condition of the tank. I'm always a little bit afraid of used air receivers, if I don't know the history of the tank.

 

[z28snksknr]

It's not just the setpoint of the relief valve that matters, it's the size of it. The one you get should be sized appropriately for the compressor output. Putting a valve that's too small is like not having one at all.

 

[Milton Shaw]

You need to check the tank for rust. A simple fill with water and then pressurize it with a pressure washer or hand tire pump to about 100 lbs over the working pressure of the compressor. If the compressor has two cylinders the same size its single stage and 125 psi working pressure. If the cylinders are different sizes and have a line from the biggest one with fins or some type of cooling design and goes to the smaller cylinder then its a two stage and working pressure would be 175 psi and need to be pressure tested at 300 psi or so. I had a compressor that I bought 45 years ago and had left in my Dad's house. When i bought it, it was used and no telling how old it really was. So I took it apart and scrapped the compressor and tank so no one could reuse them. The compressor was the weirdest thing I had ever seen. The intake air came through the crankcase, I think it probably was an old ammonia compressor that some one had made into a air compressor.

 

[thod44]

tank looks good not much rust if any on the inside......i can see in there w/ a light if i take out one of the big plugs.....i will try the pressure test thou....but this safety valve isnt for the tank...it seems like it is used to protect the aftercooler in case of a pressure build up....that is why im wondering what the psi should be .......figured someone would have a saylor-beall model 705 they could look at.....the one for the tank is there where it should be....

 

[trbomax]

I have one just like that. I will look and take a pic tomorrow. As I recall, it IS a pop off valve, but there is also one on the reciever.

 

[thod44]

ok thanks .....where is the reciever? is that where the filter is? i have a tee on the tank that has a pop off and a gauge and there is a hole on the aftercooler where one should be?that is the one i dont know what psi to use....didnt see anywhere else on the pump for one...

 

[kams1973]

IIRC, SB recommends 150psi max for the 705

 

[thod44]

that is for the aftercooler right? not for the tank itself?

 

[kams1973]

For the tank. The pressure relief setting should be 25psi above that.

 

[W-Cummins]

Well I went and looked at the parts listing and now it's more clear. IT is NOT an aftercooler it's an intercooler! Why not just purchase the part from them it's pt # 3587-K it can't be that much $$

William....

 

[thod44]

i could not find anyone local that sells saylor-beall parts nor could i find a website that offered factory parts.....i figured if i could just get what psi it is i can pick one up from my local napa.....unless someone knows a site that has factory parts?

 

[W-Cummins]

i could not find anyone local that sells saylor-beall parts nor could i find a website that offered factory parts.....i figured if i could just get what psi it is i can pick one up from my local napa.....unless someone knows a site that has factory parts?

You didn't look very hard it took me under a minute to find one
http://www.ctg123.com/rapid-quote-system/request/?p=3587K

Buy the way they list it as a 1/4" 70psi valve, they have a toll free phone number and also an online 30 minute quote.

William....

 

[thod44]

thanks didnt see that site when i googled that part number.....

 

[trbomax]

OK,this is how mine is and its a factory setup,not "assembled". The item that you are calling an "aftercooler" is actually an "intercooler",designed to extract some of the heat fom the first stage compresser before the air goes to the second stage. The relief valve installed there is stamped " 75psi". In the other pic you see the delivery tube exiting the second stage cylinder and going to the reciever. Not there is a one way check valve installed in the reciever at this piont. Next to that is the main relief valve which is stamped "200psi".The tag on my reciever is stamped"200psi wp",which means that it can be run w/200psi continously. This unit does not have an "aftercooler". That would be installed in the copper discharge line before the compressed air enters the tank. These are very uncommon on small compressers.

This unit shuts off at 150psi,turns on at 110psi,but that can be adjusted differently if desired.My personal preference would be off at 150,on at 130,but this is only a back-up unit so its not a priority for me.

 

[thod44]

that is exactly what i need to know thank you very much.....yes it is the intercooler.....i dont have an aftercooler either just the copper line to the check valve(in the middle of the tank)....and my gauge and receiver saftey valve are on the other side of my tank w/ the pressure switch....

 

[thod44]

Last question i swear.....I need to make a discharge pipe .....from head to check valve....what is the best grade or type of copper to use? there is a 3/4 compression at the head and check valve, so no need to flare it...can i use just regular copper pipe from lowes that you would use in your house or does it have to be special????