PRONAL shutters

Pronal diaphragms are flexible circular rubber jacks. These jacks are installed in the legs of offshore platforms and assist the buoyancy of the fixed platform, while also maintaining its center of gravity when it is installed at sea. Our ...

“OHP & OPV” stoppers are capable of plugging all types of pipeline (Concrete, steel, HDPE, stainless steel…). They have been designed to withstand strong back pressures of up to 35 bars and even more on request. This is why they can be ...

Because Pronal is concerned in environmental protection, we have developed a range of stoppers to contain any accidental pollution that could be released following an incident. Pronal anti-pollution stoppers are permanently installed ...

Pronal has designed an inflatable stopper system for implementing hydraulic tests on superheater dryer units (GSS). This system is a combination of two solutions: •An inflatable stopper which plugs the outlet on the side of the VISM valve ...

The primary circuits in nuclear power plants are equipped with swing type check valves. The ASN has determined the frequency that the tightness of these swing valves must be tested. This is why Pronal has developed a range of “tailor-made” ...

OFR anti-pollution stoppers are designed to rapidly and permanently plug pipes in the event of accidental pollution. The rapidity of this response can be attributed to a system of pneumatic stoppers which can be remotely inflated. The ...

On the first hand, Operators greatly appreciate uni-plug stoppers when they are called upon to intervene in pipelines on nuclear sites. These low-pressure inflatable stoppers are effectively capable of preventing any foreign objects from ...

THPGV inflatable stoppers are used within the primary zone of nuclear facilities. These systems are designed to plug steam generator man-holes during maintenance operations or if leaks are present in the steam generator’s water boxes. It ...

When the power produced by a pressurized water reactor proves to be insufficient, it may be necessary to replace the reactor’s steam generators. For this very reason, Pronal has designed stoppers for steam generator replacement, therefore ...

EDF is responsible for determining the hydraulic test bubbles used for ABP / ACO pipelines (secondary circuit). The preferred technique for achieving this is the installation of high-pressure pneumatic stoppers. It is for this reason ...