SetUp and Safety HighPressure Air Bags This PowerPoint is intended as a general review of highpressure air bag setup and safety practices There are various different air bag systems currently used in Snohomish County Always refer to your departments SOPSOGs as well as manufacturers rec ID: 682526
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Slide1
High-Pressure Air Bags 101
Set-Up and SafetySlide2
High-Pressure Air Bags
This PowerPoint is intended as a general review of high-pressure air bag set-up and safety practices.
There are various different air bag systems currently used in Snohomish County. Always refer to your departments SOP/SOG’s as well as manufacturers recommendations prior to use.
All high-pressure airbag operations should be performed in conjunction with proper stabilization practices. See Snohomish County Training Officers 2014 (First Quarter)
“Vehicle Stabilization”
http://www.snocountychiefs.org/divisions/fire_training_officers/quarterly_training.cfmSlide3
High-Pressure Air Bags
Safety:
Wear appropriate protective clothing, helmet, eye protection and gloves.
Never exceed maximum inflation pressure (usually 118-135 psi).
Never connect or disconnect system components while pressurized unless a safety in-line relief valve is in place.
Always ensure you are positioned on the opposite side of the expected load movement.
Never be below a load that has not been blocked or cribbed. Stay on your feet!
Always center the load on an airbag (can violently eject).
Never stack more than two air bags on each other during operations.Slide4
High-Pressure Air Bags
Safety continued:
Always place the smaller air bag centered on the top of the larger.
Inflate only enough to achieve desired lift.
If the desired object to be lifted has a small surface area of contact, always use plywood/ dimensional lumber or other rigid material between the bag and the object to distribute the load.
Always inflate slowly to prevent load shifting and stabilize/block as you go.
Ensure all valves between the air source and bags are in the closed position prior to turning on the air source.
Ensure the air bags are not in contact with hot or sharp objects prior to operation.Slide5
High-Pressure Air Bags
Safety continued:
Always have the bags connected to the air hose prior to placing under the load.
It is a good general practice to inflate the bag to only 75% of its stated lifting capacity . This is to avoid the “pillow” effect and reduces the potential for the bag to slip or kick out.
When stacking two bags the maximum tonnage of the smaller bag is the maximum that can be lifted.
Change the air supply when the bottle drops to 100 psi.
Reduce rated bag tonnage capacity by 50% to calculate the maximum tonnage capacity when lifting height exceeds 1” i.e., a 30 ton bag with a maximum lift of 10” will lift 30 tons 1” or 15 tons approximately 7.5”.
Only 1 person should give the controller the order to lift.Slide6
High-Pressure Air Bags Slide7
High-Pressure Air BagsSlide8
High-Pressure Air Bags
The dual “
deadman
” safety relief and control valve is one type of valve commonly found in Snohomish County. It has a single input from the air source and two outputs for dual bag operations.
Each output has a gauge for reading the pressure within each bag during use.
The control valve has quick
disconnect hose fittings and
dual push-button
controls to apply and release air pressure
to either
one or two lift bags.Slide9
High-Pressure Air Bags
Air hoses come in a variety of colors and are all inter changeable within the system.
When inflating or deflating air bags the hose color determines the commands for each individual bag. Example: “
u
p slow on yellow” or “down slow on red”.
In-line relief valves are quarter turn shut-off valves which allow the controller to be disconnected while maintaining pressure within the air bag. This is common for repositioning during multiple bag lifts.Slide10
High-Pressure Air Bags
The most common supply for air bag systems is an SCBA bottle. A large portion of Snohomish County use 4500 psi Scott bottles which need an adaptor to connect to the system.
There are two types of pressure regulators found with air bag systems. Each has a gauge indicating delivery pressure and supply pressure.
Piston
DiaphragmSlide11
High-Pressure Air Bags
Assemble all of the components:
Seat adaptor onto air bottleSlide12
High-Pressure Air Bags
Attach regulator to adaptorSlide13
High-Pressure Air Bags
Connect air line to regulatorSlide14
High-Pressure Air Bags
Remember to secure the locking rings!Slide15
High-Pressure Air Bags
Connect airline from regulator to the controllerSlide16
High-Pressure Air Bags
In-line relief valves should be connected to either the controller end or directly to each air bag in use.
Shown in the open position. Relief valves should always be closed prior to charging system.Slide17
High-Pressure Air Bags
Connect airline from the controller to the air bag with the in-line relief valve located at the desired end.Slide18
High-Pressure Air BagsSlide19
High-Pressure Air Bags
Turn on the air supply.
Adjust the regulator to the appropriate pressure.Slide20
High-Pressure Air Bags
Once the air bag system is assembled, move it into position for the
lift
(Scene
Survey‐ INNER and OUTER
Circle with stabilization i.e. chalk, keys & parking brake should already be complete)
Slide21
High-Pressure Air Bags
Prepare to receive commands for the lift operation.Slide22
Tactical Decision
It’s 07:00 on a Friday morning and you’re dispatched to a Car vs. Pedestrian.
Multiple callers report a child has been struck by a vehicle while waiting for the school bus.
Upon arrival you note a crowd has gathered around the scene and a witness states the child is still trapped under the vehicle.Slide23
Tactical Decision
This is what you see. You note the patients left leg is rolled on top of his right and pinned under the rocker panel.Slide24
Tactical Decision
What are your scene consideration?
What resources will be needed for the operation?
What stabilization methods will need to be used for an air bag operation?Slide25
Training
Gather all needed equipment for a high-pressure air bag operation.
Review air bag safety and stabilization practices with your crew.
Assemble the air bag system and lift a vehicle utilizing proper stabilization techniques.
Safely lower vehicle.Slide26