For applications requiring low lift forces and therefore low inflation pressure, Pronal offers lifting bags made of Polyurethane (PU) material.
Due to the manufacturing process – high frequency welding – they can be designed in various shapes so they can be easily installed in all types of machines.
Those lifting bags are very thin (2-3mm) and can therefore be integrated in very narrow spaces for “soft” applications.
Technical information
Low pressure lifting bags are made of PU and welded by high frequency welding process.
- Elasticity / flexibility (even at very low temperatures – min. -50°C)
- Good abrasion resistance
- Highly resistant against hydrocarbons
- No limit of dimensions
- Up to 0.5 bar (7.25 PSI) working pressure
![gonflage vérin](http://fr.pronal-liftingbag.com/wp-content/uploads/sites/2/2014/08/3-4BD-150x150.jpg)
Threaded stem for inflation fittings 1/4″ or 3/4″
![Polyurethane hoses - Industrial lifting bags](http://fr.pronal-liftingbag.com/wp-content/uploads/sites/2/2014/08/TUB_PU-150x150.jpg)
PU Inflation Hoses
![Schrader valve](http://fr.pronal-liftingbag.com/wp-content/uploads/sites/2/2014/08/IMG_0452-150x150.jpg)
Schrader valve
Miscellaneous:
![velcro_web](http://fr.pronal-liftingbag.com/wp-content/uploads/sites/2/2014/08/velcro_web-150x150.png)
Maintaining Velcro
![Lifting bag - Threaded fixation insert](http://fr.pronal-liftingbag.com/wp-content/uploads/sites/2/2014/08/insert_fixation_BD-150x150.jpg)
Threaded fixation insert
![Skirt for easy installation](http://pronal-liftingbag.com/wp-content/uploads/2014/09/20130313_094926_BD-150x150.jpg)
Skirt for easy installation
Pronal can manufacture several bag shapes such as:
![Cubical](http://pronal-liftingbag.com/wp-content/uploads/2014/09/square-01-150x150.jpg)
Cubical
![Circular](http://pronal-liftingbag.com/wp-content/uploads/2014/09/other-Doughnut-01-150x150.jpg)
Circular
![Parallelepiped](http://pronal-liftingbag.com/wp-content/uploads/2014/09/rectangle-01-150x150.jpg)
Parallelepiped
![Cylindrical](http://pronal-liftingbag.com/wp-content/uploads/2014/09/cylindrical-01-150x150.jpg)
Cylindrical
![3D doughnut](http://pronal-liftingbag.com/wp-content/uploads/2014/09/3D-Doughnut-01-150x150.jpg)
3D doughnut
![Flat doughnut](http://pronal-liftingbag.com/wp-content/uploads/2014/09/Flat-Doughnut-01-150x150.jpg)
Flat doughnut
Other shapes on request.
- 0.2 bars max working pressure for bags made of PU sheet (no fabric reinforcement)
- 0.5 bars max working pressure for bags made of PU coated fabric
- Clamping layers of composite during ski manufacturing process
- Sealing of jars during powder product filling
- Pushing of car roof during gluing operation
- Sealing of bigbag
- Work using a high stroke lifting bag
- Grinding arm guiding
- Guide a fabric
- …
Gallery:
Pronal low pressure lifting bags implementation: