inflatable jackinflatable jack

Square/ circular/ rectangular inflatable jack

Inflatable jack, or lifting bag, is a pneumatic system made of elastomers or plastomers

Filled with air, water or oil, these products are typically mounted in industrial automation systems to push, press, guide, clamp, lock, dampen, lift and handle.

When deflated, the cylinders return to their original shape, and because of their small empty thickness, they can be easily integrated into tight spaces. For example, they can be integrated into presses, molds, conveyors, handling robots or lifting tables

Like flange cylinders, they are available in double and triple bellows versions.

Depending on the available space and shape, flexible cylinders can have different shapes. There are annular, square, rectangular, circular and special shaped jacks. 

We choose the material of our products so that it is suitable for its environment of use. We customize each lifting bag in terms of size, shape and material. 

Our inflatable jack is the ideal solution for applications that require a high lifting force at a defined height. They are virtually maintenance-free.


Handy to use

  • Requires a single air inlet
  • Fast inflation
  • Adapts to complex geometric shapes


  • Thin when deflated
  • Uniformly distributed force
  • Small dimensions


  • No mechanical parts
  • No maintenance
  • Long service life

Detailed information

  • Material: A variety of elastomer coated fabrics (NPVC )
  • Manufacturing technique: Hot vulcanisation in a vacuum autoclave
  • Flat standard dimensions: from 100 x 100 mm to 1000 x 1000 mm
  • Custom dimensions: contact us
  • Thickness at rest: 20 mm max. for one stage, 40 mm for two stages and 60 mm for three stages
  • Shape: square
  • Inflation: air, water or oil
  • Temperature resistance: up to 80°C continuous
  • Max. inflation pressure: 7 bar or more depending on conditions of use
  • Lifting travel: depending on jack dimensions
  • Possible options: a change in material or accessories as required.

Pronal offers a standard square shaped range in sizes starting at 100 x 100 mm sides, with a thickness of approx. 20 mm for the single stage model (VER HP K1). Two other versions are offered with a double (VER HP K2) and triple (VER HP K3) bellows design.

You can not find your dimensions

Our design department employs the best project leaders and designers and will be pleased to develop and create a tailor-made product specially for your unique project.


Composition / Advice

Care during use
Avoid any contact with surfaces that are too abrasive or have cutting edges. Stabilise and guide the load to lift. Refer to the Installation manual.
Maintenance advice
There are no fixed maintenance intervals.
Storage advice
Store away from light, damp and temperature variations, in its original case
Inflation advice
Refer to the cylinder table in the offer.

Standards / regulations

1 year against all manufacturing defects.


Fact Sheets / Business Guides
  • This field is for validation purposes and should be left unchanged.


1/8", 1/4" and 3/4” inflation tubing
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