A method of improving sealing for a pulsation dampener including a body having an internal cavity and a first opening and a second opening, wherein the second opening providing fluid communication between the internal cavity of the body and a fluid flow external to the body, a cover plate closing the first opening, and a flexible diaphragm held between the body and the cover plate by a seal area of the flexible diaphragm, the flexible diaphragm filled with a compressible material configured to dampen pressure pulsations within the fluid flow by allowing a portion of the fluid flow to enter the internal cavity through the second opening when a pressure of the fluid flow compresses the compressible material, the method comprising;
- and
- fitting a diaphragm radial compression ring to the seal area of the flexible diaphragm, between the body and the cover plate, to increase a sealing force sealing the internal cavity by compression of the seal area of the flexible diaphragm between the cover plate and the body.