In two-phase flow, the underlying principle upon which the leakage flow rate may be determined is that any leakage of the valve will cause an increase in the pressure on the downstream side of the valve because of frictional resistance to flow in the downstream piping which corresponds to an...
[21]compared downstream blood flow profiles of trileaflet and bileaflet valve models using computational fluid dynamic modeling and observed the expected central region of flow and higher wall shear stresses with the trileaflet model. Gallegos et al.[22]tested the Triflo valve (Triflo Medical;Fig...
() comprising a valve housing (), a valve seat () and a valve body () adapted to fit in closing relationship in said valve seat () in a closed position, said housing () has an inlet () and an outlet () for a pressurized fluid, positioned upstream and downstream of the valve ...
A valve includes a body having upstream and downstream ports to measure upstream and downstream pressures and configured on a common axis, and a ball arranged in the body to rotate re the common axis between open and closed positions to allow for fluid flow and no fluid flow. The ball has...
Ball valves are shutoff valves that use a ball to stop or start the flow of fluid downstream of the valve. The ball, shown inFigure 7-1, performs the same function as the disc in other valves. As the valve handle is turned to open the valve, the ball rotates to a point where part...
Imposing correct boundary conditions to the flow model is critical because the local flow dynamics are influenced by downstream and upstream conditions. Patient-specific LPM simulating the function of the left side of the heart was coupled to the inlet of the mitral valve model. This data was obt...
Normally closed modulating elements without an internal orifice act as a bypass compensator to maintain a constant pressure drop across an orifice, regardless of variations in upstream or downstream pressure. All ports will accept 5000 psi (350 bar). ...
NRC/INEL under the "Containment Purge and Vent Valve Test Program" in 1985 showed that manufacturers methods for predicting torque requirements had serious limitations. Under design basis conditions, torque requirements in single-offset valves with shaft downstream were found to be self-opening, ...
The invention relates to a pressure-reducing valve, e.g. for the supply of water, which maintains the pressure in the downstream lines constant without auxiliary energy, irrespective of the upstream pressure, and ensures that the reduced and controlled downstream pressure is as independent as possib...
A counterbalance valve allows an upstream flow from the back port to the load port through the check valve stage, and it allows a downstream flow from the load port to the back port through the relief stage. Counterbalance valves help with load holding, load actuation speed control, and ...