For applications with high required forces (and therefore very high inflating pressure), Pronal offers 7 bars inflating pressure bags 

Made from rubber coated fabric and vulcanized under vacuum in an autoclave, the Pronal HP bags could be inflated up to 7 bar while remaining relatively thin (18mm). The vulcanization process makes the final product homogeneous and guarantees a long lifetime. (more than 10 years in some cases)

 

Technical information

NPVC rubber coated fabric

  • UV resistance
  • Ozone resistance

In option, Pronal can propose:

  • FDA rubber coating
  • EPDM coating
  • High resistance temperature coating (up to 140°C)
Vulcanization under vacuum in an autoclave

- Dimensions restrictions:

  • Square models : 2500 * 2500 mm
  • Rectangular models : 5500 * 2500
  • Circular models : Ø 2500 mm

Because of the assembly process, a “dead area” (= no inflation zone) will be located all around the bag. This dead area has to be deducted from the surface of the bag before calculation of the applicable force.

Inflation:

gonflage vérin

Threaded Inflation stems position 1/4″ ou  3/4″

Schrader Valve

Schrader Valve

The inflation stem can be placed on the face or the edge. If on the edge, a short tube of copper with a quick connect coupler at the end will be provided; or an integrated steel insert where a stem will be mounted.

Note : The inflation stem located on the edge will increase the “dead area” dimensions.

 

 

 

Miscellaneous:

Maintaining velcro for lifting bags

Maintaining Velcro

Threaded insert - Pronal Lifting Bags

Threaded insert

Lifting bag material protection

Additionnal surface coating

Pronal can manufacture several bag shapes such as:

Cubical

Cubical

Circular

Circular

Parallelepiped

Parallelepiped

Cylindrical

Cylindrical

3D doughnut

3D doughnut

Flat doughnut

Flat doughnut


Max 3 stages (K1 = square 1 stage / K2 = square 2 stages/ K3 = square 3 stages …)

Other shapes upon request.

7 bar maximum

  • Lifting bag tensioner
  • To lift and move a load
  • To maintain parts during a vulcanization process
  • Tipping over a bucket
  • Clamping complex shaped parts
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Gallery

Pronal high pressure lifting bags implementation: