Packard V8
Well-known member
The Ingersoll-Rand Type 30 has been the industrial workhorse for nearly a hundred years. However, they're made in versions from 1/2hp to 30hp, single, twin and three cylinder, many different displacements. My machinist had used a 1946 I-R Type 30 Model 235 D5 compressor but it had burned up three 5hp motors over the eight years he'd been using it.
We knew the head was used with several different horsepower levels, each turning a specific RPM. He decided it needed more horsepower, so I was helping him rig it and size the drive pulley for a 10hp motor.
It took a lot of searching to find a site with a scan of a catalog with detailed specifications for that old beast, but what I discovered was his compressor head is a single stage twin cylinder rated max 80 PSI. I-R recommends their two-stage head for anything more than that.
He'd been running the single stage to 120 PSI. That made the compressor run hot and the motors run to destruction. He's good with machines and has owned several industrial air compressors, but had completely missed the difference between a high-volume single stage and a high-pressure two-stage.
He's now using a two-stage compressor which can't keep up with the volume the cylinder hone, blast cabinet require. What we decided to do is use the two-stage compressor for those applications requiring high pressure. The I-R will be plumbed to those machines needing high volume. By limiting it to 80 PSI, with the 10hp motor, he can turn it as high as 900 RPMs and have all the volume he'd ever need and the motor should last forever.
jack vines
We knew the head was used with several different horsepower levels, each turning a specific RPM. He decided it needed more horsepower, so I was helping him rig it and size the drive pulley for a 10hp motor.
It took a lot of searching to find a site with a scan of a catalog with detailed specifications for that old beast, but what I discovered was his compressor head is a single stage twin cylinder rated max 80 PSI. I-R recommends their two-stage head for anything more than that.
He'd been running the single stage to 120 PSI. That made the compressor run hot and the motors run to destruction. He's good with machines and has owned several industrial air compressors, but had completely missed the difference between a high-volume single stage and a high-pressure two-stage.
He's now using a two-stage compressor which can't keep up with the volume the cylinder hone, blast cabinet require. What we decided to do is use the two-stage compressor for those applications requiring high pressure. The I-R will be plumbed to those machines needing high volume. By limiting it to 80 PSI, with the 10hp motor, he can turn it as high as 900 RPMs and have all the volume he'd ever need and the motor should last forever.
jack vines