Actual Popping Pressure of a Relief Valve With a Real Helical Spring Under Dynamic Load

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Abstract
This paper presents the describing equations of a poppet-type relief valve with a real helical spring, that is, a spring having distributed mass. The sinusoidal analysis shows that the actual popping pressure is very frequency dependent and may occur at pressures that are a fraction of the static popping pressure to twice that value. Experimental data which verify the theory are also presented.

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