Online Automotive A/C Reference Guide
   Automotive Air Conditioning FAQ's and Technical Information
     
 
Would you like to...
Print this page
Email this page
Save this page
Ask a question
Post a comment



User Opinions
55% 44%

(85 votes)

How would you rate this article?
Helpful
Not helpful
 
   Browse by Category

Automotive A/C Basics | Auto A/C Tech Tips | Articles by Ignacio | Pattern Failures
Retrofit/Conversion | Service Tools | Tables & Charts | Link Directory | Other Auto Repair Tips

Knowledge Base Home Knowledge Base Home

What Size Vacuum Pump Should I Buy?


Question: What size vacuum pump should I buy. Is 1.5 CFM enough, or should I spend the extra money for a 6 CFM vacuum pump.

You'll notice quite a wide variety of sizes and ratings when shopping for a vacuum pump. We feel you should look at the CFM rating in comparison to the primary use of the pump. You should also choose a pump which can achieve a deep vacuum based on the factory micron rating. Pumps that have a factory rating of 100 microns or less would make a good choice.

1.2 to 3 CFM - This range of pump is suitable if you plan on servicing the average car or truck. It's perfect for any single evaporator model between a Geo Metro and a Hummer H2. The advantage of the lower CFM pumps are ease of storage and transport. If you plan on doing on-site service, the footprint of the 1.2 CFM pump is hard to beat.

4 to 5 CFM - Good choice if you plan of servicing medium duty trucks, buses, or vehicles equipped with rear air.  This size pump provides a good balance between speed and versatility.  Vacuum pumps in this displacement class would be well suited for any high volume automotive repair shop.   

6 to 10 CFM - If you service or install air conditioning in trucks or buses that hold over seven pounds of refrigerant, 6 CFM or larger pumps are ideal.










Related articles
Attachments
No attachments were found.

Use of this Web site constitutes acceptance of the Aircondition.Com Knowledge Base User Agreement

Powered By Aircondition.Com

   Copyright © 2017 Aircondition.Com. Trademarks are property of their respective owners.