Two Stage Air Compressor Pumps: Replacement 2 Stage Pumps

CompressorPros carries two stage air compressor pumps built for higher pressure and heavier duty cycles than single stage. This category serves production shops, fleet operations, and facility managers replacing a worn pump. Browse two stage pumps across a range of horsepower and CFM outputs, all shipping free, direct from the manufacturer.

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What Are Two Stage Air Compressor Pumps?

A two stage air compressor pump compresses air in two steps, sending it from a large low-pressure cylinder through an intercooler and into a smaller high-pressure cylinder before it reaches the tank. That second stage lets the pump reach higher pressure, generally around 175 psi, while running cooler than a single stage design under the same load. Shops with higher demand, production lines, and higher-pressure processes rely on them, and this category includes options like the C-Aire W95II 7.5 HP Two Stage Pump and the Schulz MSV 40 MAX 10 HP Cast Iron Pump.

Matching Horsepower and CFM

The most practical way to narrow this category is by the horsepower your existing motor delivers and the CFM you need at the tool. Two stage pumps are commonly grouped around 5 HP, 7.5 HP, and 10 HP and up, with CFM output rising alongside. If you have a 5 HP, it needs to be a minimum of 22 AMPS for a 5 HP two stage pump.

A 5 HP pump such as the C-Aire V95II delivers around 17 CFM, which suits a smaller shop. Step up to 7.5 HP and output moves closer to 27 CFM, enough to operate grinders and HVLP paint sprayer. At 10 HP and above, the pumps are aimed at higher demand.

The pump must be rated to work with the motor you already own. Pairing a higher-output pump with an undersized motor causes overload and premature wear, so confirm compatibility before ordering.

Types of Two Stage Air Compressor Pumps

Cast Iron Two Stage Pumps

Cast iron construction is the standard for two stage pumps because it tolerates the heat and sustained load that come with higher duty cycles. These pumps are a strong choice for shops running long compression cycles. The Schulz MSV 20 MAX 5 HP Two Stage Cast Iron Pump is a quality 5 HP cast iron pump, larger pumps are available.

Retrofit and Conversion Pumps

Where an original pump is discontinued, a replacement pump paired with a retrofit kit can replace it without changing the rest of the machine. The QT1 Basic with Retrofit Kit replaces a Quincy QT 5 in this way. These are worth checking when an exact-match pump is no longer produced.

Brand Lines

Jenny Two Stage Pumps

Jenny offers two stage pumps across a broad horsepower spread, from the 1.5 to 5 HP range up through 10 HP. The Jenny 1.5 to 5 HP Two Stage Model GTU covers the lower end, with the Model U serving 7.5 to 10 HP applications. Browse the full Jenny pump line to match a model.

C-Aire Two Stage Pumps

C-Aire two stage pumps are specified by both HP and CFM, which makes fit straightforward when you know your air demand. The line spans 5 HP through larger units. See all C-Aire pumps for the full range.

Schulz Two Stage Pumps

The Schulz MSV MAX series covers 5, 7.5, and 10 HP in cast iron two stage construction, with several models available as kits. Browse Schulz pumps for current options.

Key Specifications To Match

Horsepower (HP): Must align with your existing motor. This is the first filter for any replacement pump.
CFM output: Determines whether the pump meets the air demand of your tools or process.
Maximum pressure (PSI): Two stage pumps typically reach around 175 psi, versus roughly 125 to 135 psi for single stage.
Mounting pattern and pulley: Physical fit to your frame and belt drive. Replacing with a different pump other than the original will typically require new bolt holes, new discharge, new drive pulley and belt(s).
Included kit contents: Replacement pumps do not ship with oil and Schulz pumps do not ship with filters. We have kits with oil and air filters for most Schulz replacement pumps.

Because a replacement pump has to integrate with the motor, frame, and drive you already own, confirm these specs before purchasing.

Frequently Asked Questions

What is the difference between a single stage and two stage air compressor pump?
A single stage pump compresses air to final pressure in one stroke and typically tops out near 125 to 135 psi, while a two stage pump uses two cylinders and an intercooler to reach roughly 175 psi. Two stage designs also run cooler under sustained load, which suits heavier duty cycles.

Do I need a two stage pump for my shop?
If your air demand is higher than what most single stage compressor pumps can produce, or need pressure above what a single stage pump delivers, a two stage pump is the better match. For intermittent light-duty work, a single stage pump is often sufficient and more economical.

Can I replace a single stage pump with a two stage pump?
Usually, no. Even if your single stage compressor is rated at 5 HP, the motor used on a single stage air compressor typically is not strong enough to operate a two stage compressor pump.

How often does a two stage pump need an oil change?
Intervals depend on duty cycle and the oil specified by the manufacturer, so follow the schedule in your pump's documentation. Consistent oil changes and clean intake filtration are the largest factors in pump service life.

What if my original pump is discontinued?
We can help get you a pump that is similar. We offer retrofit kits for Quincy pumps that have been discontinued.

Shop Two Stage Air Compressor Pumps at CompressorPros

CompressorPros carries two stage air compressor pumps across the horsepower and CFM ranges most shops need, alongside single stage pumps and the wider replacement pump category. Matching HP and CFM, plus psi required keeps the swap straightforward. All orders ship free, direct from the manufacturer, and our team can help you confirm the right pump.

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Two Stage Air Compressor Pumps

BelAire and Chicago Pneumatic T39 (1312101036) 5-7.5 HP Air Compressor Pump

BelAire and Chicago Pneumatic Cast Iron Air Compressor Pump C2 1312202700 7.5 - 10 HP

Industrial Gold CA2 (Old CI10) 7.5 - 10 HP Cast Iron Compressor Pump

C-Aire Chinook K 30 Air Compressor Pump

C-Aire W95II 7.5 HP Two Stage Air Compressor Pump 27 CFM for 7.5 and 10 HP C-Aire Compressors

Cast Iron Air Compressor Pump C1 1312202800 5 - 7.5 HP With Aftercooler

Ingersoll Rand Replacement Air Compressor Pump T30 2475 for 5-7.5 HP Air Compressors

C-Aire PM F 25A-K Air Compressor Pump

Industrial Gold CA1-B 5-7.5 HP Cast Iron Compressor Pump Model (Old CI5)

Schulz MSV 20 MAX 5 HP Two Stage Cast Iron Air Compressor Pump

Jenny 1.5 - 5 HP Two Stage Model GT Air Compressor Pump

C-Aire V95II 5 HP Two Stage Air Compressor Pump 17 CFM