OMT 9 CFM 2 Stage Rotary Vane Vacuum Pump for R12 R22

The Orion Motor Tech 9 CFM two-stage rotary vane vacuum pump is built for HVAC technicians and fabricators who need deep, fast evacuation. Powered by a 3/4 hp copper motor, it pulls down to 1.5 microns (0.2 Pa). This makes it capable of evacuating systems using R12, R22, R134a, and R410a refrigerants, as well as handling non-automotive tasks like vacuum ovens, drying setups, wood stabilization, and hold-down tables.

Speed and noise management are key strengths of this unit. The 9 CFM flow rate moves volume quickly, while the direct motor-to-pump coupling delivers power efficiently without excessive mechanical chatter. A specialized exhaust port cap filters output and dampens sound, consistently keeping operation under 70 dB.

Daily maintenance and transport are straightforward. The 12.8 fl. oz. oil reservoir features a clear sight glass marked with a measurement scale, so you can check fluid levels at a glance. For transport, it includes a nonslip handle and a detachable power cord that eliminates cord bending and makes packing up easier.

Before buying, consider the operating constraints. The pump is rated for a 2-hour duty cycle and functions in ambient temperatures between 32 and 122°F, meaning continuous all-day runs require cooling breaks. Additionally, the manufacturer notes that some units sold after July 14, 2024, may feature packaging mislabeled as a single-stage pump despite containing this two-stage model.

Verdict: This Orion Motor Tech unit is an excellent pick for technicians and makers needing strong 9 CFM flow and a deep 1.5 micron pull across multiple hose sizes. It delivers reliable performance for both HVAC servicing and shop vacuum applications.

• Motor: 3/4 hp copper motor
• Flow Rate: 9 CFM
• Pump Design: 2-stage rotary vane
• Ultimate Vacuum: 1.5 microns (0.2 Pa)
• Oil Capacity: 12.8 fl. oz.
• Noise Level: Below 70 dB
• Operating Temperature: 32 to 122°F
• Duty Cycle: 2 hours
• Port Compatibility: 1/4-inch, 3/8-inch, 1/2-inch hoses

A great fit if you:

• Service AC systems using R12, R22, R134a, or R410a refrigerants
• Need a fast 9 CFM evacuation rate down to 1.5 microns
• Use vacuum equipment for wood stabilization, vacuum drying, or hold-down tables
• Prefer a pump with a quiet output under 70 dB

Consider something else if you:

• Need continuous run times that exceed a 2-hour duty cycle
• Work in freezing conditions below 32°F or extreme heat over 122°F

Which refrigerants is this pump compatible with?
It is designed for servicing systems that use R12, R22, R134a, and R410a refrigerants.

What hose sizes can I connect to this vacuum pump?
The pump is compatible with 1/4-inch, 3/8-inch, and 1/2-inch hoses.

Why does the box say single-stage pump?
Due to a packaging printing error on products sold from July 14, 2024, the box may state single stage, but the included unit is the 9 CFM two-stage model.

How much oil does the reservoir hold?
The oil reservoir has a capacity of 12.8 fluid ounces and features a built-in sight glass with a measurement scale.