I am in the process of getting an Aero Sub Compressor 6000 Plus. Anyone know anything about this compressor?
I am getting 6 tanks (4 which are usable) a couple of regulators and old computers. An OLD BCD and a White Stag Horse Collar all for $200
Moderator: captain
I ran into the same problem on Aero Sub, with that engine being underpowered for the additional torque needed to reach full pressure. I put an adjustable sheave or pulley on the engine (available at Grainger), and adjusted it to be smaller than the drive pulley that is now on the engine. Or you could just use a smaller diameter inexpensive pulley. Your compressor will turn a little slower, but will require less horsepower to keep it turning. Or you could use a stronger engine, but the slightly lower compressor speed will also let it run slightly cooler.time2dive wrote:....the gas engine wants to quit at about 2700psi. If I carefully push on the throttle control lever I can increase the speed of the gas motor to keep it pumping up 3000 psi....
That's a good point, and a fairly common condition. Even a small leak of 1 cfm makes up a large percentage of the rated capacity on the small units. Age and cold weather is particularly bad about making hoses leak around the area where the end connections are crimped on, so be sure to check those areas under full pressure.captain wrote:....Also small leaks on a small compressor can dramatically slow fill times and you can't hear them when it is running. I suggest you use soapy water and check for leaks at every connection and at any safety relief valves when it is running....
http://www.olmeva.com/english/aerosub/compact6.html
Captain, The engine speed around 3500 sounds normal, but your 1500 rpm pump speed is lower than the 2200 rpm specs on the link you provided. Do you have the same compressor block? That might explain why yours works. I didn't check the pump rpm on mine, just adjusted the sheave until it didn't bog down the engine. I no longer have it, so I can't check rpm now.captain wrote:The 5 HP Briggs on mine runs at 3500 rpm for a compressor speed of 1500 rpm.
Please don't adjust any relief valve unless you know which stage it is on. If it is not the final pressure relief, it is likely relieving an over pressure situation in one of the earlier stages. Some of their compressors (especially gas powered) did have one on the final output that was easily adjustable to set the fill pressure, and if you are lucky that's what it is.Sandy123 wrote:There was an Aero Sub Plus 6000 dive compressor that came installed on a boat that I purchased. It works but the safety relief valve starts to leak at about 1800 psi and then lets go at about 2000 psi so that is as much as I can fill a tank to. This compressor must be about 25 years old. Does anyone know if you can buy parts anywhere? Or can a safety relief valve be "adjusted" ?
Users browsing this forum: No registered users and 2 guests