I decided to tear this pump down and demonstrate it before binning it, I’ve already done a few vids on rotary compressors before but theirs no harm in doing more detailed ones Its from a single phase 240V powered 7.1Kw split unit that was scrapped because of a bad compressor motor.(short to earth)

A few ppl have asked for more info on using a fridge compresssor as an air pump in the past so I thought I’d show y’all my silent compressors to give an idea on how to construct one. The most important thing is a pressure regulator and cut-out switch to ensure the tank dosn;t over pressurize and burst. these compressors can put out a lot of pressure. The Tandem SC15’s that i have as a permanent workshop compressor barely become warm when charging the tank from dead flat to 100 PSI, they are rated at roughly 3/4 HP each and have no trouble seating tire beads, spray painting or running a small sand blaster.

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I was thinking about the reason why these rotary compressors have reed valves on the output when theoretically they shouldn’t be needed, and after a quick test with an air compressor, it’s quite apparent why: Without the valve, the high discharge pressure would turn the compressor into a motor, and would spin it up to high speed in reverse, potentially damaging the motor or compressor.

This is a 2 cylinder Australian made refrigeration compressor, made by Kirby Manufacturing – Australia. I removed it from a scrap condensing unit used on an IGA supermarket meatcase. This one is similar to a 3 cylinder Kirby compressor that I scrapped 12 months ago, after it ran dry of oil (very little remained in crank case, mixed with melted plastic from the polypropylene splash shield) and subsequently overheated to the point of throwing the no2 con rod, jamming up and burning the motor windings out (no motor protector was fitted)

This is an old rotary compressor from a large Panasonic window-box AC unit, I have sliced the housing length ways with a 4″ grinder and slitting wheel and dismantled it as far as i could to show you what it is made up of. One thing that sets these compressors aside from reciprocating (piston) units is that the outer housing is the “high” side of the HVAC system, unlike the reciprocating units where the housing receives the low temp gas from the evaporator and discharges High pressure, High Temperature gas through a tube, straight to the condenser.

Removal of a 1982 Chevy Luv Truck Air Condition Compressor Clutch. By Gerald & Stephen Cromer

I did this vid before I tried the scroll motor, just been too lazy to upload it first.

In the Spirit of Christmas Carnage Funny old Daikin Inverter with Horizontal Compressor

Lucky day for me!!! Me and my bro was going to Best Buy to look at some games and stuff then I saw the recycle box near the door so I dug in and found some cell phones and stuff also a Working Dell Laptop , after working on it I took my air compressor and blew alot of dust out but then after I found out that the wlan card was loose and fixed it. Specs are: AMD Dual Core 1.8Ghz, 1GB ram, and 120GB HDD Lucky ME!!!! What great stuff people recycle these days.