Emglo Compressor Questions

The compressor has no intake filter so I will need to buy one. The intake has a pipe thread recipticle about 1.25" diameter. What is my best option for a filter? This will be used in my garage for hobby/tractor work.

The SquareD pressure switch has a ruptured diaphram. Can I get a new diaphram or will the entire switch need to be be repalced?

This compressor doesn't have an on/off switch, only the pressure switch. The motor is 220v, 17 amps. What type of on/off switch should I put on this?

I timed how long it took to pump to 175 psi from an empty tank and it took 10 minutes. Does this sound reasonable? Anyone know what this pump's cmf rating is?

The compressor leaks at the crank seal where the flywheel attaches. Does anyone know what the part number for the oil seal is? Are rebuild kits available for this pump?

Wow, lots of questions thanks for reading!

Regards, Tim

Thanks for the info!

Roger P, if I am using the formulas correctly from your link, my compressor, at 10 min for 80 gallons, doesn't seem too slow. Sure, a little worn/leaky but still serviceable. I have a 3 horse motor turning the pump at 500 rpm.

Charles, I got this compressor without a magnetic switch. It only has a broken SquarD pressure switch. I gave it a quick check out wired to the circuit breaker. Do I really need a mag switch, as this will be just used on the weekends in my garage and it only pulls 17 amps? I was thinking of just replacing the pressure switch and getting a grey shutoff switch like you suggested, but why the fuses as I will have it wired to a circuit breaker for protection?

This site is great. I get to come home a lean something interesting every night!

Tim

No you really don't need a box with fuses, if you have circuit protection up at your panel like you should, but you must have a disconnect at the unit, a plug and outlet, or a switch.

Charles

• Kellogg Specs for All Units

CompAir ditched the whole Kellogg line a few years ago after a restructuring, but parts are still readily available.

10 minutes seems pretty slow, and tells me you probably have valve problems. Unfortunately, this pump has no interstage safety valve to pop when valves go bad, so it is a bit harder to diagnose valve problems with this pump. They are readily removeable, however, just by pulling the two bolts on each oval valve cap. They are sealed with silicone O-rings, so there is no trouble with remaking gaskets. You will need a proper motor starter for this unit, with a separate disconnect switch and some time delay fuses.

You can get a replacement diaphragm, but it might be more trouble than its worth to track it down. I have never worked anywhere that stocked rebuild kits for pressure switches.

Any compressor shop should have replacement filter assemblies that you can thread right in. Sounds like you need a 1" NPT size fitting on it.

To me, 10 minutes sounds like way too much, but this is something Rodger has a better feel for.

Emglo was acquired by DeWalt. This may significantly change the parts availability issue for these fine old American built machines.

If you have the unit running I assume you have a magnetic starter mounted on it already and are just asking about a wall mounted shutoff switch. You can use just about anything with a 30 amp or better rating. (never exceed 80% of rated capacity for continous operation, so a switch rated at 20 amps is not enough for a steady 17 amp draw). Many switches and disconnects have a hp rating on the data plate, be sure and respect this, if it doesn't go as high as 5 hp, don't use it.

You could use the simple old grey box with fuses and a pull switch on the side, something like an ourside disconnect box for a central air system, or anything one of several other switches that would do the trick.

Link

Select page 342 and 340.

You probably should consult an electrician on this to be assured on having wiring, circuit protection and a switch/disconnect that conform to code (for safety, fire protection, and insurance purposes, not to mention peace of mind).

Charles