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Flexible separators for your electrical transformers

On 07 June 2016
Flexible separators for your electrical transformersFlexible separators for your electrical transformers

Flexible Separators (STP)

STP seperators
, also described as "bladders", are designed 
to protect the oil contained in electrical transformers. 
They form between air and oil ont the interior of hydraulic tanks.


PRONAL's solution

Impermeable to gases, oils and water, quick and easy to deploy, and with high levels of mechanical resistance PRONAL STPs represent a high-performance option for tailor-made hydraulic compensators..

  • Attractive price
  • Short manufacturing time
  • High performance


«For several years now, I have been using PRONAL products (STP separators, flexible tanks, retention systems) for transformers maintenance. Easy to set up and to transport from one job site to the next, proposed solutions are well adapted to our job.

During separator replacement, we have now the possibility to transfer the oil in a flexible tank. It’s more economic and less time consuming than trucks solution. Moreover, it’s totally secured with the retention pool.

Pronal is always available, during order process or in case of advice during the utilization. They are able to adapt the standard products or to develop a new one to meet our requirements.»


+33 (0)3 20 99 75 00

Energy sector

Standard or customized range's design of seal, lifting bag, tank, stopper and compensator

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