Summary Conventional ball valve systems and insert-guided cages compromise performance due to gas interference, solids accumulation, vibration that shortens the life efficiency of conventional traveling standing cages. The analysis flow profile around a common resulted in design new proprietary pump system maximizes fluid flow, creating vortex extends service while increasing production. was co...

BACKGROUND The objective of this work was to obtain a controlled subjective and objective in vivo clinical comparison of the Passy-Muir, Shiley, and Ball speaking valves. METHODS Ten patients free of laryngeal pathology but dependent on tracheotomy for respiration were tested with each of the speaking valves. Olfaction was assessed for each patient using the University of Pennsylvania Smell I...

It is now believed that aortic insufficiency and calcific aortic stenosis must be treated with total valve replacement. Until recently this was performed with the aid of prostheses of teflon and similar materials. Even if the short-term results were promising, follow-up studies revealed a high percentage of breakdown of these prostheses (Bjork, Cullhed, and Lodin, 1963; Larson and Kirklin, 1964...

A mechanical flow controller manipulates the valve to maintain the downstream flow rate in spite of the leakage. The size of the valve opening at time t is V(t). The flowrate is measured by the vertical position of the float F(t). The gain of the controller is A/B. This arrangement would be entirely impractical for a modern flow control application, but a similar principle was actually used in ...

Ketersedian peralatan pembelajaran laboratorium dalam menghitung nilai head loss, khususnya untuk menunjukkan coefficient loss pada valve, dibuat prototipe sistem perpipaan dengan menggunakan valve diamati nya. Dalam realitanya tidak semua persoalan aliran dapat diselesaikan persamaan bernoulli karena beberapa terdapat kerugian energi, juga ada mekanik, sehingga Bernoulli. Karakteristik yang me...

The patient described developed hemolytic anemia following insertion of a StarrEdwards aortic valve prosthesis. No diastolic murmur was heard and no insufficiency was detected. The hemolytic anemia was progressively more severe and uncompensated despite various medical measures. The anemia was characterized by fragmented erythrocytes in the peripheral blood, reticulocytosis, elevation of plasma...