نتایج جستجو برای: automatic control valve
تعداد نتایج: 1549482 فیلتر نتایج به سال:
EDITOR: We report the malfunction of an adjustable pressure limit (APL) valve on a KION (Siemens, SiemensElema AB, Solna, Stockholm, Sweden) anaesthesia workstation which occurred twice. The first time, the malfunction was detected during the pre-use manual check, but not by the automatic self-check. The second time, the malfunction occurred intermittently during ventilation of a patient but it...
Introduction: Rheumatic heart disease still remains one of the leading causes of congestive heart failure and death owing to valvular pathologies, in developing countries. Valve replacement still remains the treatment of choice in such patients.The aim of this study wasto analyze the postoperative outcome of double valve replacement (Mitral and Aortic ) in patients of rheumatic heart disease. ...
Introduction: The mitral valve prolapse is a heart syndrome that is characterized by considerable physical and psychological consequences for affected patients. This study aimed to assess the efficacy of cognitive-behavioral therapy in reducing worrying, generalized anxiety and panic attacks in patients with mitral valve prolapse. Methods: This study is quasi-experimental research with prete...
A simple automatic analytical system, consisting of separate modules, for liquid chromatography has been constructed. The different parts of the automatic machine are an auto sampler, an auto dispenser, a selector valve with eight channels, a heater/cooler, a mixing chamber and a pressure air driven injector valve. The process was controlled by a PC from an easily changeable run protocol. The s...
Control valves are commonly found in modern process plants. The control valve reliability is critical to the control quality and safety of a plant. Whether a control valve meets the challenge of the control requirement depends on its response characteristics. To obtain the characteristics of the control valve, an experiment test system is developed to assess the performances of the control valv...
introduction: rheumatic heart disease still remains one of the leading causes of congestive heart failure and death owing to valvular pathologies, in developing countries. valve replacement still remains the treatment of choice in such patients.the aim of this study wasto analyze the postoperative outcome of double valve replacement (mitral and aortic ) in patients of rheumatic heart disease. ...
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