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Yeah unfortunately my boss purchased this used a few years ago and they didn't seem to have the information available. It was a "steal" so we ended up buying it, thinking we were just going to use it as an ambient settling tank. I remember I had to sell a tank for scrap for an old company I...

What if we were to hydrostatically test it by pulling a light vacuum on it?

"diesel421; Quote: One of them appears to be pressure/vacuum rated, and we need to pull a vacuum of -7 to -4 psig. How do you know this if you mentioned in your post " Uh that was the point of the entire post. I want to use this tank to pull this vacuum, but I don't know if I can b/c...

My boss ordered two tanks that have no plates on them indicating their ratings (MAWP, temps, jacket ratings, etc.). They were purchased used in Nevada and the guy he bought them from doesn't have the paperwork as to where he got them, what they were used for, or what the ratings were on them...

i should add this is a low rpm application (200-400 rpm). we don't forsee the friction that packed centrifugal pumps typically experience but we could be wrong.

This is actually for a Lightnin mixer shaft rather than a pump shaft but it is the same concept. We have a 1 1/2" Lightning mixer shaft with a set of braided square packing rings. We also bought a plastic lantern ring for $200.00. Recently, my boss found a brass lantern ring for $1,000.00...