1 / 15

AIR BAGS

AIR BAGS . Types of Air Bags. Low pressure high lift High Pressure low lift Square Rectangle Round. Low pressure high lift. Usually in a cubical or cylindrical shape Common operating pressure of 15 psi Ability to lift higher than high pressure bags

lilike
Télécharger la présentation

AIR BAGS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. AIR BAGS

  2. Types of Air Bags • Low pressure high lift • High Pressure low lift • Square • Rectangle • Round

  3. Low pressure high lift • Usually in a cubical or cylindrical shape • Common operating pressure of 15 psi • Ability to lift higher than high pressure bags • Require more clearance to put in place up to 2 inch • Unstable till fully inflated • Not commonly used for rescue

  4. High pressure low lift • Can be round, square or rectangular • High lifting capacity • Low clearance needed as little as 1 inch • Limited lifting height • Stiff and heavy to handle • Looses stability as the height increases

  5. Square air bags • Used mostly for high pressure systems • Offers best power versus lifting height • Relatively stable at low lifting height • Bag rounds out as it lifts becoming less stable • Max lift is rated at 1 inch high

  6. Rectangular air bags • Used in both low and high pressure systems • When it inflates it resembles a log • Stable on one direction at any height

  7. How air bags work • To figure the lifting capacity multiply length x width x the working pressure of the bag • 10’x 10’= 100 • 100 x116 = 11600 • 116 is the working psi • Bag is rated at 11,600 pounds

  8. How air bags work • Power curve • When deflated the bag is flat • As it is inflated it forms a pillow shape • As the height increases the contact patch decreases • The higher the bag lifts it losses it’s lift capacity

  9. Stacking air bags • Not recommended • But not out of the question • Do not stack more than 2 high • Largest bag on bottom • Inflate largest bag first • Inflate no more than two thirds of either bag

  10. Lifting with air bags • Always crib when you lift • Lift an inch crib an inch • Crib on all sides of the object not to allow lateral movement • NEVER assume an air bag is stable ALWAYS CRIB AS YOU LIFT

  11. Cribbing for air bags • 2x4 • 4x4 • At least 18 inches long • Wedges • Stair steps

  12. Cribbing for air bags • Crib at two points on the down side of the vehicle • Place a crib box next to the lifting point • Use of box cribbing is recommended • Crib as you lift

  13. Cribbing for air bags • To gain lifting height use a solid base for the bag to sit on • Crib tower should not be taller than it is wide

  14. Air Bag Safety • Always inspect before use • Use manufactures recommendations • Lift an inch crib an inch • Provide edge protection for the bags • Do not stack more than 2 high • Have line of sight between the controller and person calling the lift

More Related