Is that two stage vacuum pump?

Yes, the 1948121 is Two Stage Rotary Vane.

Can I use a 7 cfm vacuum pump on a car?

That's plenty for a car system...you can also use a smaller, less expensive 1 or 2cfm pump. 5 cfm and larger are for residential and commercial A/C systems.

What's ultimate vacuum this 12 cfm vacuum pump can pull in microns?

I walked away from it long enough to see it hit 293.

Can i use the 5 or 9 cfm on my freeze dryer? i need at least 150 or better mtorrs. and is it maintenance free or do i have to cange the mineral oil?

Oil needs to be changed occasionally when it becomes cloudy or discolored for better vacuum.

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hilmor BVP2CFM 2CFM Battery Powered Vacuum Pump for HVAC Tools and Equipment, 9Ah 18 Volts, 1/2 Horsepower, 11 oz. Oil Capacity A2L Compliant

hilmor BVP2CFM 2CFM Battery Powered Vacuum Pump for HVAC Tools and Equipment, 9Ah 18 Volts, 1/2 Horsepower, 11 oz. Oil Capacity A2L Compliant

Product ID: 198498069

Details

Brand
Hilmor
Color
Green
Item Weight
13.2 pounds
Material
Plastic
Power Source
Battery

👀Oversized sight glass for quick oil level checks

💨3 CFM airflow for efficient vacuuming

🔒Leak-proof blank-off valve for precise vacuum control

S$1221

Duties & taxes included

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Description

⚡ Pump up your HVAC game with precision and speed!

SWIFT 3 CFM AIRFLOW - Power through residential HVAC jobs with fast, reliable vacuuming.
CLEAR OIL MONITORING - Oversized sight glass lets you spot contamination instantly—no guesswork.
LEAK PROOF PRECISION - Blank-off valve isolates pump to maintain vacuum during oil changes—accuracy guaranteed.
SMART OIL MANAGEMENT - Sloped, channeled housing and oversized fill port speed up oil changes and extend oil life.
HANDS FREE PORTABILITY - Dual hoist points pair perfectly with the hilmor carrying strap for effortless transport.

The hilmor Vacuum Pump 3 CFM (model 1947970) is a durable, polyethylene-bodied vacuum pump designed for efficient HVAC oil changes and vacuuming. Featuring a 3 cubic feet per minute airflow, oversized sight glass for contamination detection, leak-proof blank-off valve for accurate vacuum readings, and dual hoist points for hands-free carrying, it’s optimized for residential and light commercial use. Compatible with hilmor carrying straps, it streamlines maintenance tasks with smart design elements like a sloped housing and oversized oil fill port.

Specifications

ASIN	B0FD49NWY9
Air Flow Capacity	2 cfm
Battery Type	Lithium-Ion
Best Sellers Rank	#2,125,802 in Automotive ( See Top 100 in Automotive ) #596 in Air Conditioning Vacuum Pumps
Brand Name	Hilmor
Color	Green
Horsepower	0.5 hp
Included Components	Pump, Battery, Charger and Charger cords for the US, EU and AUS markets
Item Weight	13.2 pounds
Manufacturer	Diversitech
Material Type	Plastic
Model Number	BVP2CFM
Number of Items	1
Power Source	Battery Powered
UPC	095247202812
Unit Count	1 Count
Voltage	18 volts

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