OPL pneumatic stoppersOPL pneumatic stoppers

OPL pneumatic stoppers

Inflatable OPL stoppers, or pipe bladders, are designed to temporarily plug all types of pipes: concrete, steel, cast iron … They can be used in a wide range of contexts thanks to their varied diameters, including sanitation, rainwater, or waste-water systems, hydrocarbon and/or chemical pipelines.

The use of these inflatable stoppers means that the following operations can be performed in complete safety:

  • pipe repairs,
  • pipeline maintenance,
  • flow deviations,
  • air or water-tightness testing, in accordance with the NF-EN1610 Standard,
  • hydraulic testing.

These pneumatic stoppers are available in standard or by-pass versions.

Our inflatable stoppers meet our demanding in-house safety criteria thanks to their construction employing high-quality materials. Pronal is well aware of the risks that may be incurred by the use of inflatable stoppers; as such, priority is placed on the quality and performance of these products. Consequently, the OPL range has been designed to withstand a burst pressure safety coefficient of at least 3. The rubber that is used for these products also provides excellent abrasion and slip protection. Choosing the OPL range is a guarantee of working with a powerful, reliable, and highly durable product!



  • High pressure and back-pressure
  • Total water and air tightness
  • High quality materials


  • Excellent back-pressure resistance
  • Safety coefficient of at least 3
  • Highly scratch-resistant


  • Easy installation

Detailed information

  • Material: SBR rubber
  • Technique: vulcanisation
  • Length: 150 > 2750 mm
  • Max. diameter: 60 > 2000 mm
  • Inflation: by air
  • Temperature resistance: -20 to +60°C (please contact us for any use outside of this temperature range)
  • Inflation pressure: max. 3 bar
  • Back-pressure: download the OPL product sheet below
  • Optional materials: thermal protection

For all OPLT information and back-pressures (with bypass), refer to the tables which are found on the product sheet, downloadable below.

Technical informations

OPL 30/6030602915030.2NA
OPL 45/8045804315030.3NA
OPL 50/100501004511030.3NA
OPL 65/125651256325030.4NA
OPLS 75/150751507019530.5NA
OPL 75/150751507035030.8NA
OPLS 100/2001002009025030.8NA
OPL 100/2001002008635031.3NA
OPL 100/1501001509012530.6NA
OPL 100/2501002508660032.2NA
OPL 125/20012520011015230.7NA
OPL 150/250150250145255321xM8
OPL 150/30015025014525532.61xM8
OPL 200/40020040019055535.52xM10
OPL 300/50030050017072535.51xM8
OPL 300/6003006002887153122xM10
OPL 400/80040080037010303222xM12
OPL 500/100050010004721140332.52xM12
OPL 500/1400500140049022001.5552xM12
OPL 600/1200600120057014001.5492xM16
OPL 600/1500600150057021801.5653xM16
OPL 800/1600800160077020001.5903xM16
OPL 800/2000800200076027501.51254xM16

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

Pre-installation tips
Inspect the pipeline and remove any rough elements (stones, deposits …). Do not inflate the stopper when it is outside the pipeline. Never place a foreign object between the walls of the pipe and the stopper.
Maintenance tips
Carefully check all the external surfaces to ensure that there are no obvious deformations (folds, bulges, or cuts). Clean the product (using slightly soapy water but not a detergent) and dry completely.
Storage advice
Store in its original case away from light, damp, and temperature variations.

Standards / regulations

1 year against all manufacturing defects


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


"Simplified" control unit
Flexible inflation hose, 5 or 10 m
Geka and quick couplers
Safety cable
Pressure reducer
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