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Influence of the valve-seat gap on the dynamics of reed type valvesInfluence de l'espace siège-soupape sur la dynamique des soupapes à lamelles multiples
(2020-10-01)
One of the main parts of refrigeration compressors is the automatic valve system used to control the suction and discharge processes. Experimental studies of these processes in the compressor environment are complex because ...
Critérios para análise de viabilidade para manutenção preditiva em válvulas de controle em indústrias de processo
(Universidade Tecnológica Federal do ParanáCuritibaDepartamento Acadêmico de Eletrônica, 2013-11-05)
The objective of this work is the definition of criteria for evaluating the feasibility of implementation of predictive maintenance techniques for control valves in process industries. Furthermore, this work brings a view ...
Low-cost proportional automatic control valve
(Universidad EafitIngeniería de ProcesosEscuela de Ingeniería. Departamento de Ingeniería ProcesosMedellín, 2020)
Control and automation are the keys to escalate to industry 3.0, in a process the control valves are responsible for performing a corrective action in the process stream against a set point in the PID control loop, ...
Comparison of friction models applied to a control valve
(PERGAMON-ELSEVIER SCIENCE LTD, 2008)
Eight different models to represent the effect of friction in control valves are presented: four models based on physical principles and four empirical ones. The physical models, both static and dynamic, have the same ...
Development of comparative electronic circuit for reduced flow valve control
(Univ Estadual Maringa, Pro-reitoria Pesquisa Pos-graduacaoMaringaBrasil, 2011)
Controle da pressão em um sistema de nitretação por plasma
(Universidade Tecnológica Federal do ParanáCuritibaDepartamento Acadêmico de Eletrônica, 2014-11-25)
This work presents a solution to pressure control in a plasma nitriding system. The control is made by a valve between the chamber and a vacuum pump, the original valve was improved to become automatic, in addition, an ...
Cardiopatía, embarazo y tratamiento anticoagulante
(Sociedad Médica de Santiago, 1999)
Increasing the reliability of solution exchanges by monitoring solenoid valve actuation
(Elsevier Science, 2010-01)
Solenoid valves are a core component of most solution perfusion systems used in neuroscience research. As they open and close, they control the flow of solution through each perfusion line, thereby modulating the timing ...
Valve friction and nonlinear process model closed-loop identification
(ELSEVIER SCI LTD, 2011)
Among several process variability sources, valve friction and inadequate controller tuning are supposed to be two of the most prevalent. Friction quantification methods can be applied to the development of model-based ...