Flow fluctuation and pulse interception type pulse dampers, which guard against pressure pulsation using PulseGuard vessel design technology. PulseGuard pulsation dampeners, hydraulic accumulators, or surge suppressors dampen pressure pulsation and smooth system flow because they do not allow pressure pulses to bypass dampening chamber by use of a “T”. Our high efficiency pulsation dampeners design ensures 300% more performance size for size than “T piece” pressure vessel designs