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rod · 02-28-2018, 08:34 PM

I want to build an air comp. just for sand blasting [I do a lot of it]. I have a 40 gal. tank and a 3 hp 240 V motor. a friend gave me a 2 stage pump. I am almost sure it needs rings and reed valves. it has no ID on it, so must be a China. looks to be a 3" 1st and a 2" 2nd with maybe a 2 1/4/1/2 stroke. fairly sizable, & a 14" flywheel. probably cost $100 for parts and a lot of time.
I can get a brand new Harbor Ft pump, 2 cyl, 145 PSI [uses a 3 hp motor] for $112 + tax, and ready to put on.
my question is, what is the benefit of a 2 stage over a 2 cyl. single stage?
Thanks Rod in AZ

02-28-2018, 08:34 PM	#1
rod Member Join Date: Dec 2009 Location: Kingman, NW AZ. in the middle of the longest stretch of Route 66 Posts: 306 Likes: 0 Liked 17 Times in 13 Posts	air comp. ? I want to build an air comp. just for sand blasting [I do a lot of it]. I have a 40 gal. tank and a 3 hp 240 V motor. a friend gave me a 2 stage pump. I am almost sure it needs rings and reed valves. it has no ID on it, so must be a China. looks to be a 3" 1st and a 2" 2nd with maybe a 2 1/4/1/2 stroke. fairly sizable, & a 14" flywheel. probably cost $100 for parts and a lot of time. I can get a brand new Harbor Ft pump, 2 cyl, 145 PSI [uses a 3 hp motor] for $112 + tax, and ready to put on. my question is, what is the benefit of a 2 stage over a 2 cyl. single stage? Thanks Rod in AZ