To Örebro University

Pressure-relief valves have an important role in life protection and system integrity. Valve system has several features and can be modelled as a mass-spring valve system. The current paper attempts to experimentally investigated unstable poppet force equivalent body valve behavior. Unstable fluid force may reproduce the valve body dynamics, resulting in unexpected flow movement fluctuation during opening as well as rising lift adjustment. Such disturbance may create inconsistent poppet valve response during the rapid opening. A lengthy pressure-quarter standing wave conduit links multiple relief valves to the reservoir. The present study proposed two systems for monitor pressure and spring tension to predict the relief valve pressure instability, attempt to deaden it, and avoid popping occurrence. The former system is internal groove in the nozzle worked as a damper, while the latter is compressed heavy oil in the disc holder.