Mastercool 90612-2V-110-BL Black Series 12 CFM Two Stage Vacuum Pump

The Mastercool 90612-2V-110-BL Black Series vacuum pump delivers high-capacity evacuation for technicians servicing commercial and industrial HVAC/R systems. Combining a two-stage design with a free air displacement of 12 CFM, it is built to handle large line sets and deep system pull-downs quickly, reaching an ultimate vacuum level of 15 microns.

Operational versatility and reliability are central to the design. The pump features dual-voltage capability, allowing you to operate on either 110V or 220V power sources depending on what is available at the job site. Powering the unit is a 3/4 HP motor equipped with thermal overload protection. To support extended run times, an integrated high-volume cooling fan works alongside dedicated cooling fins to maintain safe operating temperatures and protect internal components from excessive heat.

Maintenance and daily handling are kept straightforward. The pump body includes a large oil sight glass marked with clear minimum and maximum level indicators, making level checks immediate. An accessible oil drain valve simplifies fluid changes, while a reinforced base provides stability to keep the machine steady on uneven surfaces.

As a trade-off, this is a substantial piece of equipment. Weighing 35 pounds (15.9 kg) and measuring 18 by 8 by 12 inches, it requires more physical effort to carry and transport than smaller residential pumps. The listing also does not mention included intake fitting sizes or whether oil comes in the package, so you may need to check your fittings before heading to a job.

Verdict: The Mastercool Black Series 12 CFM pump is an excellent choice for HVAC/R professionals who require rapid, deep evacuation on large commercial systems. Its dual-voltage flexibility, protective cooling, and stable build make it a dependable workhorse where smaller pumps fall short.

• Free Air Displacement: 12 CFM
• Pump Design: Two-stage
• Ultimate Vacuum: 15 microns
• Motor Power: 3/4 HP
• Voltage: Dual voltage (110V / 220V)
• Motor Protection: Thermal overload protection
• Dimensions: 18 x 8 x 12 inches
• Weight: 35 lbs (15.9 kg)

A great fit if you:

• Service commercial or industrial HVAC/R systems that demand a fast 12 CFM flow rate.
• Work across varied job sites requiring both 110V and 220V electrical supply options.
• Run long evacuation cycles that need thermal motor protection and active fan cooling.
• Want easy visual oil checks and quick fluid drains on the job.

Consider something else if you:

• Only handle small, light-duty residential jobs where a lightweight, compact pump is preferred.
• Need a unit that weighs significantly less than 35 pounds for frequent ladder work.

What is the vacuum level and flow rate of this pump?
The unit delivers a free air displacement of 12 CFM and pulls down to an ultimate vacuum of 15 microns using a two-stage mechanism.

Can this vacuum pump run on different voltages?
Yes, it features dual-voltage operation supporting both 110V and 220V power sources.

How does the pump prevent overheating during long jobs?
The 3/4 HP motor includes thermal overload protection, paired with a high-volume fan and cooling fins to dissipate heat during prolonged use.

What are the physical dimensions and weight of the unit?
The pump measures 18 inches long, 8 inches wide, and 12 inches high, and it weighs 35 pounds (15.9 kg).