MRO Field Guide

Compressors & Air Treatment: Complete Unit, Pump Head, or Dryer-Which Setup Fits?

Four very different compressed air listings: a used industrial compressor, a parts-unit, a pump head, and a refrigerated dryer. Compare listed prices and roles to decide which fits your project.

Last updated Aug 17, 2026

If you're shopping for compressed air equipment, you're not just comparing prices-you're comparing entirely different jobs. This set of listings includes a complete used industrial compressor, a gas-powered unit sold for parts, a brand-new pump head, and a refrigerated air dryer. Before you pick one, you need to know which role each product plays in your workshop setup.

Quick take

The Ingersoll Rand Model 7100 is the only full industrial compressor in this group, listed at $1,849.99. The Uimoso pump head is the lowest-priced item at $109.99, but it's a component rather than a finished compressor. The 120L/min refrigerated dryer at $315.00 is for drying compressed air, not compressing it. And the Ingersoll Rand Type 30 Model 253 at $400.00 is listed for parts or not working. Your choice comes down to whether you need a whole unit, a rebuild starting point, or a supporting component.

Listed-price comparison

ProductListed PricePrice Bar
Uimoso Industrial 3HP 375L Twin Cylinder Air Compressor Head Pump 11CFM 116PSI$109.99
120L/min Refrigerated Gas Dryer Air Compressor Compressed Air Drying Filtration$315.00
Ingersoll Rand Type 30 Model 253 Industrial Gas-Powered Air Compressor$400.00
Ingersoll Rand Model 7100 Industrial Air Compressor$1,849.99

Decision matrix

If you need...Recommended listed option
A complete, large-capacity industrial compressorIngersoll Rand Model 7100
A pump head for a build or replacementUimoso 3HP Twin Cylinder Pump
A dryer for existing compressed air lines120L/min Refrigerated Dryer
An Ingersoll Rand for parts or restorationType 30 Model 253

Product notes

Ingersoll Rand Model 7100 Industrial Air Compressor

Ingersoll Rand Model 7100 Industrial Air Compressor

This unit pairs the IR 7100 cast-iron two-stage pump with a Baldor motor, a large horizontal receiver tank, and an aftercooler. It's used, appears complete, and shows cosmetic wear from normal shop use. If you need a full-size compressor and you're comfortable buying used industrial equipment, this is the one to start with. The limitation is its condition: because it's pre-owned and sold as pictured, you'll want to inspect it carefully before relying on it for heavy duty work.

Ingersoll Rand Type 30 Model 253 Industrial Gas-Powered Air Compressor

Ingersoll Rand Type 30 Model 253 Industrial Gas-Powered Air Compressor

This gas-powered Ingersoll Rand is a parts or project unit, with a 'For parts or not working' condition. Surface rust, an untested engine, and a missing air cleaner assembly are all part of the described state. On the positive side, the Type 30 designation gives you a specific Ingersoll Rand industrial model to work from, and it makes a starting point for a rebuild or parts search. The limitation is clear: it is not ready to run, and inspection, service, or repairs are expected before use.

Uimoso Industrial 3HP 375L Twin Cylinder Air Compressor Head Pump 11CFM 116PSI

Uimoso Industrial 3HP 375L Twin Cylinder Air Compressor Head Pump 11CFM 116PSI

This new Uimoso item is specifically a compressor head pump, not a complete compressor. It's a single-stage, oil-lubricated twin-cylinder pump rated at 3 HP, with an 11 CFM flow and 116 PSI maximum pressure. The aluminum construction and cast iron cylinder liner are aimed at heat dissipation, and the belt pulley drive is a common setup for custom builds. The main limitation is that you'll need to supply the tank, motor, and other components to turn it into a working air compressor. If you're already building a system or replacing a worn pump, this fits that project role.

120L/min Refrigerated Gas Dryer Air Compressor Compressed Air Drying Filtration

120L/min Refrigerated Gas Dryer Air Compressor Compressed Air Drying Filtration

This refrigerated dryer is for compressed air treatment, not compression. It is rated for 120L/min flow, 110V 60Hz power, 210W consumption, and has a specified outlet dew point of ≤10°C. It uses electromagnetic valve drainage and has G1/4 inlet and outlet connections. If you already have a compressor and want to cut moisture before it reaches tools or equipment, this unit fills that gap. The limitation is that it cannot generate air pressure on its own; it sits downstream of a compressor. It doesn't carry a recognizable brand name, so the decision rests on the detailed specs.

Final recommendation by use case

  • If you need a complete industrial compressor now: The Ingersoll Rand Model 7100 is the only listed option that's a full unit. Its used condition means you should be ready to evaluate it in person.
  • If you're building or upgrading a compressor: The Uimoso pump head gives you a new component to work with, but you'll need to supply the rest of the system.
  • If moisture is your problem: The 120L/min refrigerated dryer is the air treatment piece to add to an existing compressed air setup.
  • If you want a parts project or restoration base: The Ingersoll Rand Type 30 Model 253 is sold for parts, so it suits someone with the time and skill to rebuild.
Products in this article
Ingersoll Rand Type 30 Model 253 Industrial Gas-Powered Air CompressorUSD 400.00View on eBayIngersoll Rand Model 7100 Industrial Air CompressorUSD 1,849.99View on eBayUimoso Industrial 3HP 375L Twin Cylinder Air Compressor Head Pump 11CFM 116PSIUSD 109.99View on eBay120L/min Refrigerated Gas Dryer Air Compressor Compressed Air Drying FiltrationUSD 315.00View on eBay
Ingersoll Rand Type 30 Model 253 Industrial Gas-Powered Air CompressorUSD 400.00View on eBayIngersoll Rand Model 7100 Industrial Air CompressorUSD 1,849.99View on eBayUimoso Industrial 3HP 375L Twin Cylinder Air Compressor Head Pump 11CFM 116PSIUSD 109.99View on eBay120L/min Refrigerated Gas Dryer Air Compressor Compressed Air Drying FiltrationUSD 315.00View on eBay

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