Quote from: UnderPressure on August 12, 2020, 10:38:21 PMQuote from: OleTomCat on May 01, 2020, 03:05:24 PMThe High Pressure end doesn't get lubricated by the oil, the oil only lubricates the shaft at the bottom of the piston. The only oil that gets to the HP end is what leaks by the first stage piston and gets entrained in the air flow.Quote from: Dan H on May 01, 2020, 02:24:58 PMQuote from: keefd on May 01, 2020, 01:26:25 PMI wonder how good this is:It's Royal Purple compressor lube, so it's not like running motor oil.NO royal purple is not designed to run in HIGH PRESSURE COMPRESSORS ! period ! its made for low pressure compressors HUGE difference ! ...we have members on here that are seeing burning oil/carbon residue in the high pressure side of the compressor running royal purple ! …. go back ,and read this thread , why on earth would you buy royal purple that cost the same price over chemlube 751 that is designed for this high pressure compressor ? …. Sounds like using oil made for high pressure compressors (like Nuvair 751) is really important then.If you want to spend more on oil than you did on the compressor then go right ahead, I've been using the Royal Purple and filling 30 & 60 min SCBA tanks from empty to 4500 psi without issue on one of the compressors, parts finally came in for the second one now I have to put in the dedicated 220 outlet for the compressor to run on and I can fill more than one tank at a time. When you put the LP piston in correctly there should be very little oil getting past the three rings what usually happens is that when they are put together the assembler or rebuilder doesn't pay attention to the orientation of the ring gaps, they need to be spaced ~ 120 degrees apart, this creates a labyrinth that keeps most of the oil in the sump. The oil gets dirty fast since the pump shaft is hardened steel and the piston rod is aluminum...
Quote from: OleTomCat on May 01, 2020, 03:05:24 PMThe High Pressure end doesn't get lubricated by the oil, the oil only lubricates the shaft at the bottom of the piston. The only oil that gets to the HP end is what leaks by the first stage piston and gets entrained in the air flow.Quote from: Dan H on May 01, 2020, 02:24:58 PMQuote from: keefd on May 01, 2020, 01:26:25 PMI wonder how good this is:It's Royal Purple compressor lube, so it's not like running motor oil.NO royal purple is not designed to run in HIGH PRESSURE COMPRESSORS ! period ! its made for low pressure compressors HUGE difference ! ...we have members on here that are seeing burning oil/carbon residue in the high pressure side of the compressor running royal purple ! …. go back ,and read this thread , why on earth would you buy royal purple that cost the same price over chemlube 751 that is designed for this high pressure compressor ? …. Sounds like using oil made for high pressure compressors (like Nuvair 751) is really important then.
The High Pressure end doesn't get lubricated by the oil, the oil only lubricates the shaft at the bottom of the piston. The only oil that gets to the HP end is what leaks by the first stage piston and gets entrained in the air flow.Quote from: Dan H on May 01, 2020, 02:24:58 PMQuote from: keefd on May 01, 2020, 01:26:25 PMI wonder how good this is:It's Royal Purple compressor lube, so it's not like running motor oil.NO royal purple is not designed to run in HIGH PRESSURE COMPRESSORS ! period ! its made for low pressure compressors HUGE difference ! ...we have members on here that are seeing burning oil/carbon residue in the high pressure side of the compressor running royal purple ! …. go back ,and read this thread , why on earth would you buy royal purple that cost the same price over chemlube 751 that is designed for this high pressure compressor ? ….
Quote from: keefd on May 01, 2020, 01:26:25 PMI wonder how good this is:It's Royal Purple compressor lube, so it's not like running motor oil.NO royal purple is not designed to run in HIGH PRESSURE COMPRESSORS ! period ! its made for low pressure compressors HUGE difference ! ...we have members on here that are seeing burning oil/carbon residue in the high pressure side of the compressor running royal purple ! …. go back ,and read this thread , why on earth would you buy royal purple that cost the same price over chemlube 751 that is designed for this high pressure compressor ? ….
I wonder how good this is:It's Royal Purple compressor lube, so it's not like running motor oil.
After switching to ester based High Pressure oil I have found less carbon deposits in the second stage, also less stuttering which was rare and now not happening at all.I suspect many of the first stage piston face collapsing may be a result of dieseling in the second stage, hammering the rod into the unreinforced piston.Yong Heng have more seals than the vevor single seal and may be less prone to oil making it's way into the second stage. Still plenty of Yong Heng first stage piston failures, and just because it hasn't happened yet is little cause for recommending oil for purposes clearly not specified by manufacturer.
Quote from: Thane on August 13, 2020, 03:12:14 PMAfter switching to ester based High Pressure oil I have found less carbon deposits in the second stage, also less stuttering which was rare and now not happening at all.I suspect many of the first stage piston face collapsing may be a result of dieseling in the second stage, hammering the rod into the unreinforced piston.Yong Heng have more seals than the vevor single seal and may be less prone to oil making it's way into the second stage. Still plenty of Yong Heng first stage piston failures, and just because it hasn't happened yet is little cause for recommending oil for purposes clearly not specified by manufacturer.FWIW, I don't use the oil recommended. And so far I've not seen any change in operation or a degradation in my oil, at least indicated by oil color or a change in level. No change in temps during operation. There's no oil in my filters. On the other hand I don't fill big tanks, all I use my YH for is to fill my Mrod.I'm using what I consider a superior hydraulic oil... Amsoil synthetic ATF. This little compressor will never experience the kind of abuse I put this oil through in a performance, 900 hp capable, built AT. Never. I'm betting my $$$ on it.I had the ATF left over from the build. So I researched. Might be good to do the same.
Quote from: OleTomCat on August 12, 2020, 10:53:48 PMI've been using the Royal Purple and filling 30 & 60 min SCBA tanks from empty to 4500 psi without issue on one of the compressors, parts finally came in for the second one now I have to put in the dedicated 220 outlet for the compressor to run on and I can fill more than one tank at a time. How long have you been doing this for?
I've been using the Royal Purple and filling 30 & 60 min SCBA tanks from empty to 4500 psi without issue on one of the compressors, parts finally came in for the second one now I have to put in the dedicated 220 outlet for the compressor to run on and I can fill more than one tank at a time.
Quote from: OleTomCat on August 12, 2020, 10:53:48 PMQuote from: UnderPressure on August 12, 2020, 10:38:21 PMQuote from: OleTomCat on May 01, 2020, 03:05:24 PMThe High Pressure end doesn't get lubricated by the oil, the oil only lubricates the shaft at the bottom of the piston. The only oil that gets to the HP end is what leaks by the first stage piston and gets entrained in the air flow.Quote from: Dan H on May 01, 2020, 02:24:58 PMQuote from: keefd on May 01, 2020, 01:26:25 PMI wonder how good this is:It's Royal Purple compressor lube, so it's not like running motor oil.NO royal purple is not designed to run in HIGH PRESSURE COMPRESSORS ! period ! its made for low pressure compressors HUGE difference ! ...we have members on here that are seeing burning oil/carbon residue in the high pressure side of the compressor running royal purple ! …. go back ,and read this thread , why on earth would you buy royal purple that cost the same price over chemlube 751 that is designed for this high pressure compressor ? …. Sounds like using oil made for high pressure compressors (like Nuvair 751) is really important then.If you want to spend more on oil than you did on the compressor then go right ahead, I've been using the Royal Purple and filling 30 & 60 min SCBA tanks from empty to 4500 psi without issue on one of the compressors, parts finally came in for the second one now I have to put in the dedicated 220 outlet for the compressor to run on and I can fill more than one tank at a time. When you put the LP piston in correctly there should be very little oil getting past the three rings what usually happens is that when they are put together the assembler or rebuilder doesn't pay attention to the orientation of the ring gaps, they need to be spaced ~ 120 degrees apart, this creates a labyrinth that keeps most of the oil in the sump. The oil gets dirty fast since the pump shaft is hardened steel and the piston rod is aluminum...Why is it that you are filling tanks from zero to 4500psi? Why are the tanks at zero?
Quote from: avator on August 13, 2020, 04:36:02 PMQuote from: OleTomCat on August 12, 2020, 10:53:48 PMQuote from: UnderPressure on August 12, 2020, 10:38:21 PMQuote from: OleTomCat on May 01, 2020, 03:05:24 PMThe High Pressure end doesn't get lubricated by the oil, the oil only lubricates the shaft at the bottom of the piston. The only oil that gets to the HP end is what leaks by the first stage piston and gets entrained in the air flow.Quote from: Dan H on May 01, 2020, 02:24:58 PMQuote from: keefd on May 01, 2020, 01:26:25 PMI wonder how good this is:It's Royal Purple compressor lube, so it's not like running motor oil.NO royal purple is not designed to run in HIGH PRESSURE COMPRESSORS ! period ! its made for low pressure compressors HUGE difference ! ...we have members on here that are seeing burning oil/carbon residue in the high pressure side of the compressor running royal purple ! …. go back ,and read this thread , why on earth would you buy royal purple that cost the same price over chemlube 751 that is designed for this high pressure compressor ? …. Sounds like using oil made for high pressure compressors (like Nuvair 751) is really important then.If you want to spend more on oil than you did on the compressor then go right ahead, I've been using the Royal Purple and filling 30 & 60 min SCBA tanks from empty to 4500 psi without issue on one of the compressors, parts finally came in for the second one now I have to put in the dedicated 220 outlet for the compressor to run on and I can fill more than one tank at a time. When you put the LP piston in correctly there should be very little oil getting past the three rings what usually happens is that when they are put together the assembler or rebuilder doesn't pay attention to the orientation of the ring gaps, they need to be spaced ~ 120 degrees apart, this creates a labyrinth that keeps most of the oil in the sump. The oil gets dirty fast since the pump shaft is hardened steel and the piston rod is aluminum...Why is it that you are filling tanks from zero to 4500psi? Why are the tanks at zero?Had to take them apart and reseal for leaks.
...Thane,What oil were you using before? Royal Purple compressor oil or something different?
How does one unsubscribe from a thread? It's not obvious; I've tried to figure it out. I've long ago lost track and or interest in this, but get daily updates anyway? LoL thanks.
I wish he would have shown us what materials he used. That looks like a great Mod....
Quote from: KnifeMaker on April 23, 2020, 08:17:27 PMHydraulic oil is designed to operate in a sealed, non aerated system. In the crank case of the compressor it will be whipped and aerated. it is NOT a good choice. Royal Purple is better, but still not opium. It is designed for low pressure pumps such as the large industrial pumps that we are all familiar with. usually 145 to 200 psi. A Dive compressor oil is optimized for our use. It is not petroleum based, and does not bread down at very high pressures. Cooter 2 just learned this recently, and also noted that the temp ran substantially lower with proper dive compressor . Coltri seems to be about the cheapest. I would have a long talk with Royal Purple engineers before using it. They have stated in the past that it is NOT rated for high pressure compressors.KnifeGreat info Knifemaker. And glad you posted. Since Dan posted about the Mobil DTE25 I've been considering that and looking for other AW46/ISO100 oils. Thanks!
Hydraulic oil is designed to operate in a sealed, non aerated system. In the crank case of the compressor it will be whipped and aerated. it is NOT a good choice. Royal Purple is better, but still not opium. It is designed for low pressure pumps such as the large industrial pumps that we are all familiar with. usually 145 to 200 psi. A Dive compressor oil is optimized for our use. It is not petroleum based, and does not bread down at very high pressures. Cooter 2 just learned this recently, and also noted that the temp ran substantially lower with proper dive compressor . Coltri seems to be about the cheapest. I would have a long talk with Royal Purple engineers before using it. They have stated in the past that it is NOT rated for high pressure compressors.Knife
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