Inflatable shutter

for watertightness testsrubber

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” inflatable stoppers for testing Bouvier Darling valves on the primary circuits. As a result, this range of stoppers is used to test the tightness of the swing mechanism on the sealing surfaces. As an example, the inflatable stoppers for testing Bouvier Darling valves are installed on the RIS / RCP circuit. In contrast to the pneumatic stopper for testing – VELAN RATEAU, the stoppers for testing “Bouvier Darling” valves are inflatable. They are equipped with a system of inflatable seals composed of layers of PMUC rubber and an inter-seal for verifying the tightness of the stopper. This system is equipped with a mechanical stop which ensures that the stopper is held in place in the main body of the valve. It is these stoppers which equip the METEOR® test bench. This test bench is used to measure the tightness of valves at a constant pressure. It can provide both instantaneous and averaged measurements of any leakage flow. Hydraulic testing is performed at a pressure of 10 Bar. Detailed information Materiel: NBR (Nitrile Butadiene Rubber) PMUC Technique: hot vulcanisation in a vacuum autoclave Dimensions: DN80 / DN150 / DN250 / DN300 Form: cylindrical Inflation: by water Temperature resistance: -25/+85°C Max. inflation pressure: 17 Bar