Hydraulic valves are used to determine the set values of hydraulic quantities (flow rate, pressure, or pressure difference) in a system its part. This is achieved through appropriate throttling stream flowing valve, which automatically by operator (e.g., opening throttle valve). The procedures for determining static and dynamic properties were described using example modeling two-stage proporti...

A mathematical model is derived that describes the dynamics of a single stage relief valve embedded within a simple hydraulic circuit. The aim is to capture the mechanisms of instability of such valves, taking into account both fluid compressibility and the chattering behaviour that can occur when the valve poppet impacts with its seat. The initial Hopf bifurcation causing oscillation is found ...

Pressure control valve (PCV) is implemented in internal combustion engine to regulate crankcase pressure. In this study, the performance of a diaphragm PCV valve is investigated numerically and experimentally. Firstly, numerical simulation is carried out using commercial code to predict the flow and pressure distribution inside the valve. Furthermore, downstream and upstream pressure of the val...

A mathematical model is derived that describes the dynamics of a single stage relief valve embedded within a simple hydraulic circuit. The aim is to capture the mechanisms of instability of such valves, taking into account both fluid compressibility and the chattering behaviour that can occur when the valve poppet impacts with its seat. The initial Hopf bifurcation causing oscillation is found ...

Overflow loss is one of the main reasons for inefficiency hydraulic system. Aiming at overflow in system, an energy recovery system based on a motor and generator proposed. Further, pressure monitoring control strategy variable speed electric adopted, which can differential between inlet outlet proportional relief valve as small value, achieve purpose by reducing valve. Through establishing sim...

A new disposable insert for the arterial roller pump, the Better-Header, provides safety and functionality beyond what standard tubing provides. It automatically limits pump outlet pressure to a level determined by the user and provides a self-contained, simple means to set pump occlusion. The Better-Header consists of a Starling-like pressure relief valve connected across standard header tubin...