VEVOR 5 CFM 2 Stage Rotary Vane Vacuum Pump 1/2 HP Air

The VEVOR 5 CFM 2 Stage Rotary Vane Vacuum Pump is built to pull deep vacuums for HVAC servicing, auto air conditioning repair, resin degassing, and wood stabilization. Powered by a 1/2 HP pure copper motor, it delivers a 5 CFM flow rate down to an ultimate vacuum of 20 microns, making it a reliable workhorse for technicians and workshop hobbyists alike.

Thermal management is a priority for long evacuation sessions. A T-shaped heat sink paired with an active cooling fan keeps the motor cool enough to operate continuously for more than two hours, backed by integrated overheat protection. It also accommodates multiple hose sizes right out of the box, featuring 1/4-inch SAE, 3/8-inch SAE, and 1/2-inch ACME male inlet ports.

To prevent messy accidents, the inlet uses a check valve and ball valve design that keeps oil from flowing back into your equipment and hoses. An exhaust filter element reduces oil smoke emissions and running noise during operation. Day-to-day handling is straightforward thanks to a rubber-clad iron carry handle, while an oil level scale and sight glass let you check your 330 ml reservoir at a glance.

Because units undergo 100 percent factory testing with oil, a small amount of residual test oil might seep out in the packaging during transit, requiring a quick wipe-down before initial setup. Users should also note that standard refrigerant manifold meters cannot measure vacuum, so a dedicated vacuum gauge or port seal test is needed to verify leakage.

Verdict: This pump is an excellent pick for HVAC technicians and craftspeople who need a multi-port, continuous-duty two-stage pump capable of hitting 20 microns across standard and A2L refrigerants.

• Flow Rate: 5 CFM
• Ultimate Vacuum: 20 microns
• Motor: 1/2 HP pure copper motor
• Voltage / Frequency: 120V / 60 Hz
• Inlet Ports: 1/4 inch SAE male, 3/8 inch SAE male, 1/2 inch ACME male
• Oil Capacity: 330 ml
• Pump Oil Type: VG100 (kinematic viscosity 46 mm2/s, viscosity 100 mm2/s)
• Refrigerant Compatibility: R22, R134a, R410a, R32, R1234yf

A great fit if you:

• Service air conditioning systems using R410a, R32, R134a, R22, or R1234yf refrigerants
• Need a deep vacuum down to 20 microns for resin degassing or wood stabilization
• Require continuous run times exceeding two hours without overheating
• Work with multiple hose fittings including 1/4-inch, 3/8-inch, and 1/2-inch connections

Consider something else if you:

• Require a cordless or DC battery-powered vacuum pump for remote locations
• Need an oil-free pump mechanism for specialized cleanroom environments

What type of pump oil does this unit require?
It uses VG100 pump oil with a kinematic viscosity of 46 mm2/s (viscosity 100 mm2/s) and has an oil capacity of 330 ml.

Which refrigerants can this pump handle?
It is compatible with R22, R134a, R410a, R32, and R1234yf, and is designed with A2L explosion-proof protection.

How do you check the vacuum pump for leaks?
You can connect a vacuum gauge directly to the inlet, or tighten all three air intake caps, run the machine for a few minutes, and check for oil mist. Continuous smoke indicates an air leak, while no mist means the seal is secure.

Why is there oil inside the packaging upon arrival?
Every pump undergoes 100 percent factory quality testing before shipping, and a small amount of test oil may leak out during transit without affecting the pump's performance.