Stuart Ablett
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- Messages
- 15,917
- Location
- Tokyo Japan
OK, I bought a compressor on January 1st 2005, it has done OK service, but this was before I really understood what a good compressor is, this one is NOT a "Good" compressor.
In >> THIS << thread I outlined a problem I was having with this compressor. I thought the problem was fixed, but is is not.
I thought I had fixed the problem, but it did not work, stuff gets between the valve seat and the rubber valve that is supposed to seal it, so it leaks, just a bit , but enough that the compressor does not really work right.
You can see the part in question below.
The rubber valve has become hard, I did sand it smooth, but the rubber is still hard, so I came up with the idea to glue on a softer new piece of rubber, I did this, the rubber is about 1/16" thick, it should have worked but the problem is still this junk that gets all over the valve, it looks like rust or something from the tank
I really want to buy a new compressor, the last one I'll buy for a very long time, the budget is tight, as we are getting ready to send our eldest daughter to Canada for high school. Right now, I'd just like to fix the compressor I have, and then start looking for a good used unit, they are out there now, as a lot of places here are going bankrupt, and a lot of these larger compressors run 3-phase motors, so they are out of reach of a lot of guys. I have three phase power in the building, because of the elevator and I have it wired into the Dungeon
Back to fixing the compressor I have.
The valve works like this, the compressed air comes from the pump to the valve, passes through and goes into the tank, the valve is a one way type, held down by a spring, when the pump is not pumping, the valve keeps the compressed air in the tank. There is also a bleed for the pump, this is the black nylon tube you see in the pics. When the pump shuts down, the pump stops pumping, the valve closes, but there is still pressure line from the pump to the valve. You don't want any pressure on the pump, because when it goes to start again, the pressure could be too high and the motor could not be able to turn the pump from a stop. The control unit triggers the valve on the bleed line, this lets any pressure in the line between the pump and the valve out, you know, that "pssssssssss" you hear when the compressor reaches it's preset pressure and shuts down.
What happen now is compressor shuts down and the control unit triggers the bleed line, and the "psssssss" goes on and on and on, until the preset point is reached and the compressor comes on again......
The problem is the junk from inside the tank(?) or the pump(?) gets between the valve seat and the rubber valve, and it leaks.
I've taken it apart and cleaned it way too many times so now I'm looking for a solution.
A new valve, something more mechanical would seem to be answer......
I just had a thought while writing this..... where is the junk coming from that is fouling the valve?
The pump takes in air through the air cleaners, and compresses it...... right?
The air the is going into the tank, must be full of this junk, I'm now thinking it can't be from the tank, the air flow is going into the tank......
Maybe I'm looking at this in the wrong way, maybe the air cleaners are falling apart, or.... But where is all the junk coming from?
Maybe I'll have to tear down the pumps, maybe the rings are gone and the junk is oil, or......?
Huh...... strange what happens when you try to coherently put your thought down.....
Oh well, what do you think of that hypothesis?
The junk that is fouling the valve cannot becoming from the tank (can it?) it must becoming from the intake side, the pump etc....
More to look into
In >> THIS << thread I outlined a problem I was having with this compressor. I thought the problem was fixed, but is is not.
I thought I had fixed the problem, but it did not work, stuff gets between the valve seat and the rubber valve that is supposed to seal it, so it leaks, just a bit , but enough that the compressor does not really work right.
You can see the part in question below.
The rubber valve has become hard, I did sand it smooth, but the rubber is still hard, so I came up with the idea to glue on a softer new piece of rubber, I did this, the rubber is about 1/16" thick, it should have worked but the problem is still this junk that gets all over the valve, it looks like rust or something from the tank
I really want to buy a new compressor, the last one I'll buy for a very long time, the budget is tight, as we are getting ready to send our eldest daughter to Canada for high school. Right now, I'd just like to fix the compressor I have, and then start looking for a good used unit, they are out there now, as a lot of places here are going bankrupt, and a lot of these larger compressors run 3-phase motors, so they are out of reach of a lot of guys. I have three phase power in the building, because of the elevator and I have it wired into the Dungeon
Back to fixing the compressor I have.
The valve works like this, the compressed air comes from the pump to the valve, passes through and goes into the tank, the valve is a one way type, held down by a spring, when the pump is not pumping, the valve keeps the compressed air in the tank. There is also a bleed for the pump, this is the black nylon tube you see in the pics. When the pump shuts down, the pump stops pumping, the valve closes, but there is still pressure line from the pump to the valve. You don't want any pressure on the pump, because when it goes to start again, the pressure could be too high and the motor could not be able to turn the pump from a stop. The control unit triggers the valve on the bleed line, this lets any pressure in the line between the pump and the valve out, you know, that "pssssssssss" you hear when the compressor reaches it's preset pressure and shuts down.
What happen now is compressor shuts down and the control unit triggers the bleed line, and the "psssssss" goes on and on and on, until the preset point is reached and the compressor comes on again......
The problem is the junk from inside the tank(?) or the pump(?) gets between the valve seat and the rubber valve, and it leaks.
I've taken it apart and cleaned it way too many times so now I'm looking for a solution.
A new valve, something more mechanical would seem to be answer......
I just had a thought while writing this..... where is the junk coming from that is fouling the valve?
The pump takes in air through the air cleaners, and compresses it...... right?
The air the is going into the tank, must be full of this junk, I'm now thinking it can't be from the tank, the air flow is going into the tank......
Maybe I'm looking at this in the wrong way, maybe the air cleaners are falling apart, or.... But where is all the junk coming from?
Maybe I'll have to tear down the pumps, maybe the rings are gone and the junk is oil, or......?
Huh...... strange what happens when you try to coherently put your thought down.....
Oh well, what do you think of that hypothesis?
The junk that is fouling the valve cannot becoming from the tank (can it?) it must becoming from the intake side, the pump etc....
More to look into