1. High Pressure Lifting Bags
SECTION: Tools and Equipment
ISSUED: REVISED: ##-####

2. Objectives To provide an understanding of the following Specifications
Use
Maintenance
Safety

3. Specifications
Lift bags are constructed of neoprene with three layers of Kevlar
Operating pressure: 118 psi
Factory tested at 200 psi
Field tested at 30 psi without a load
Melting point: 220ºF

4. Load Chart Maximum ratings are achieved at a 1 inch lift
Model
Size (Inches)
Tons
Lift (Inches)
Burst (psi)
KPI-12
12 X 12
10.8
8.2
700
KPI-17
15 X 21 15 9
KPI-22
20 X 20
20.2 11
KPI-32
24 X 24
29.9 13
600
Maximum ratings are achieved at a 1 inch lift
Lift is based on square inches of contact
As the lift increases in height, the capacity of the lift bag will decrease
Calculations are done by multiplying the square inches of surface contact by 118 psi

5. Pressure Regulator Piston type regulator Safety valve set
Up to 6000 psi incoming pressure
Safety valve set
135 or 150
Depending on model

6. Dual Deadman Controller
Maximum operating pressure
118 psi
Safety valve setting
Single inlet and dual outlets
Quick connect fittings
With locking rings

7. Supply Hose 16’ in length 3/8” diameter
Maximum working pressure of 250 or 300 psi
Depending on model
Burst pressure at 1000 psi
Equipped with threaded lock rings
Black hose
From regulator to dual deadman control valve
Color hose
From dual deadman control valve to lifting bag

8. Inline Relief Valve
Allows the lifting bag to remain inflated under a load after deadman control valve is disconnected
Relieves excess pressure from the lifting bag
Above 135 psi
Excessive pressure can be caused by load shifts or temperature changes
Connect valve directly to deadman control valve
Preferred method
Can connect valve directly to air bag
Use extreme caution

9. Use
To lift heavy objects with the coordination of cribbing

10. Operating Procedure Pressure Regulator
Attach to an SCBA cylinder
Adjust outlet pressure
Turn adjusting knob to set at 135 psi

11. Operating Procedures Dual Deadman Controller
Attach black hose from pressure regulator
Complete with locking ring
Attach color hose(s) to outlet(s)
Dual safety deadman valves
Up is green
Down is red

12. Maintenance
Check overall condition of the regulator and dual deadman control valve
Wash with mild soap and water
Thoroughly inspect lifting bag after every use
Check lifting bag for leaks
Fill to 30 psi
Coat bag with soapy water and inspect for leaks
Check hoses for leaks, cuts, cracks, or holes
Ensure all couplings are in good working condition

13. Safety Wear appropriate PPE
Minimum of helmet, gloves, and eye protection
Maintain good communication between crew members involved
Lift an inch, crib an inch
Avoid hot spots and sharp edges
Protect bag when temp. is more than 150 degrees
Use plywood if lifting a small diameter object
Helps distribute the weight
Do not inflate bag more than 30 psi without a load
Try to avoid stacking lifting bags
Only stack a maximum of 2 lifting bags, with the smaller bag on top