Orifice Design of a Pilot-Operated Pressure Relief Valve

Abstract

An important safety factor to be considered when designing a plant is the prevention of overpressure-induced explosions, to which many plants are vulnerable because of pressurized fluids in plant components. A pilot-operated pressure relief valve is a core device for venting off overpressure formed inside vessels and pipelines. The pilot-operated pressure relief valve has a highly complicated structure, and its design and production should be thoroughly studied. In this study, a simplified structure for the pilot-operated pressure relief valve was proposed to facilitate the design and production processes, and the effective ranges of its design variables were determined to enable the prediction of the impact of the design variables in the design and production processes. The ranges determined were validated by a numerical flow analysis and experiment as follows. We calculated the maximum orifice diameter at which the main valve does not open and examined the minimum orifice diameter that can resist the impact of strong shock waves. Additionally, we defined the orifice diameter range that ensures the stable opening and closing of the main valve under various pressure conditions. The effective ranges of the design variables determined in this study can be used to ensure safe operation of a pilot-operated pressure relief valve under various pressure conditions with the design of the proposed simplified structure.

Characteristic Analysis of Digital Large Flow Emulsion Relief Valve

“…erefore, under the premise of meeting the design requirements, the weight of the pilot valve spool can Anterior chamber volume 0.9e -6m 3 Anterior chamber volume 1.2e -6m 3 Anterior chamber volume 1.5e -6m 3 be appropriately reduced, thereby reducing the oscillation of the valve core and shortening the stabilization time.…”

“…Fluent was used to simulate the flow field near the damper hole with different diameters. e structure of the relief valve was optimized through the damper hole [3]. But at present, the transmission medium of the relief valve is pure water or traditional hydraulic oil, and the research on the emulsion relief valve is less.…”

Analysis of the Movement Characteristics of the Pump Valve of the Mine Emulsion Pump Based on the Internet of Things and Cellular Automata

“…Dasgupta and Watton employed the bond graph approach to investigate the dynamic characteristics of the valve and obtained the influence of damper hole, spring, and other structures on the response of the relief valve system [11]. Sang and Kang [12] studied the spool damper hole of the emulsion pump valve. Fluent was used to simulate the flow field near the damper hole with different diameters.…”

Characteristic Analysis of Digital Emulsion Relief Valve Based on the Hydraulic Loading System

“…e flow field simulation research of relief valve mostly focuses on the simulation analysis of local structure flow field, most of which focuses on the two-dimensional steadystate simulation of main valve or pilot valve port [21][22][23]. Tian et al designed the structure of a digital pressure relief valve of water-based hydraulic.…”