This morning I charged an empty 3L scuba tank to 300 Bars. It took 21 minutes and the auto shut off pressure which I dialed to 300 Bars measured the same on the tank gauge when it shut off. That works out to 39L of air per minute, which is very close to the compressor’s spec of 40L. The 5 gallons of water I had was a bit less than needed to keep the temperature below 65°C. So I swapped the pump into 2 gallons of water at 14 minutes, which started bringing the temperature down. I have a much better pump ordered, so I’ll see how much water I need next time.
In operating the compressor, I have both bleed valves open and let it run for 15 seconds to get the oil circulating as well as starting with no load. Next I close them off and very slowly open the tank valve and let it fill up. Shortly I’m going to install a check valve in the line at the tank end, so when the tank is full, I can open the compressor bleed valve while running to blow off the pressure before shutting it off while the check valve will maintain the tank pressure. Basically a wear reduction thing that will let the compressor spin down with no load instead of abruptly stopping from the pressure backlashing the pistons. Honestly, I don’t have anything bad to say about other than managing the heat, but with a better cheap pump, a little more water, or maybe throwing a big bottle of frozen water into the bucket, that should take care of that.
As far as oil, I’m using Mobil 427 ISO 100 which was the only local option. I’ll likely switch to synthetic once the gallon is used up, Mobil 827 or that Royal Purple Synfilm that many seem to like.
By the way, I’ve come across many who order this compressor shipped from China, and usually the base model. Shopping around for mine, I found a seller in the US who has the 110 VAC adjustable auto shut off pressure model for the base model price. It took 3 days to arrive.
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F283270753885
It’s the real thing for $268, free shipping, and came new in a big crate.
In operating the compressor, I have both bleed valves open and let it run for 15 seconds to get the oil circulating as well as starting with no load. Next I close them off and very slowly open the tank valve and let it fill up. Shortly I’m going to install a check valve in the line at the tank end, so when the tank is full, I can open the compressor bleed valve while running to blow off the pressure before shutting it off while the check valve will maintain the tank pressure. Basically a wear reduction thing that will let the compressor spin down with no load instead of abruptly stopping from the pressure backlashing the pistons. Honestly, I don’t have anything bad to say about other than managing the heat, but with a better cheap pump, a little more water, or maybe throwing a big bottle of frozen water into the bucket, that should take care of that.
As far as oil, I’m using Mobil 427 ISO 100 which was the only local option. I’ll likely switch to synthetic once the gallon is used up, Mobil 827 or that Royal Purple Synfilm that many seem to like.
By the way, I’ve come across many who order this compressor shipped from China, and usually the base model. Shopping around for mine, I found a seller in the US who has the 110 VAC adjustable auto shut off pressure model for the base model price. It took 3 days to arrive.
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F283270753885
It’s the real thing for $268, free shipping, and came new in a big crate.
