[WaG] No moving parts. High frequency pumps are the most suited for no moving parts pulsation dampeners. Bladderless, Foamless Pulsation Dampeners / Snubbers with No Moving Parts: Zero maintenance pulsation dampeners that attenuate pressure pulsation by use of a liquid to gas to liquid "phase change", or "release from solution".
[WaG-RJ] No Moving Parts / Ram-Jet / Helmholtz Orifice. Dampeners that accelerate the velocity of the pressure wave, increasing its amplitude, then destroy the wave by exploding it into a chamber, within which chamber the distance to any reflection point is so great that the amplitude is decreased to an acceptable level.
[WaG-CER] No Moving parts / Acoustic / Bladderless. Dampeners that cause the distance between point of pressure pulse wave entry and point of exit to be a huge multiplicity of distances.