A pressure-compensated valve (PC valve) is a type of flow control device that is a combination of a control orifice and a compensator (often called a hydrostat). The compensator orifice modulates its opening to maintain a constant pressure drop across the control orifice. In other words, the PC valve is so designed that the flow rate through the valve is governed only by the opening of the control orifice and is independent of the total pressure drop across the valve. Because of the high nonlinearities associated with this type of valve, it is impossible, in practice, to design such a valve where the flow rate is completely unaffected by the pressure drop across the valve. In this paper, the effect of the nonlinearities on the performance of the PC valve is investigated. First, a generic nonlinear model of a PC valve is developed. Using this model, all possible operating conditions can be determined. Then a linearized model is developed and used to analyze the dynamic behavior of the PC valve. The model can then be used to evaluate and improve the design and operation of the valve for specific applications.
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e-mail: rtb093@engr.USask.Ca
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March 2007
Technical Papers
Analysis of a Pressure-Compensated Flow Control Valve
D. Wu,
D. Wu
Department of Mechanical Engineering,
University of Saskatchewan
, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canada
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R. Burton,
R. Burton
Department of Mechanical Engineering,
e-mail: rtb093@engr.USask.Ca
University of Saskatchewan
, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canada
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G. Schoenau,
G. Schoenau
Department of Mechanical Engineering,
University of Saskatchewan
, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canada
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D. Bitner
D. Bitner
Department of Mechanical Engineering,
University of Saskatchewan
, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canada
Search for other works by this author on:
D. Wu
Department of Mechanical Engineering,
University of Saskatchewan
, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canada
R. Burton
Department of Mechanical Engineering,
University of Saskatchewan
, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canadae-mail: rtb093@engr.USask.Ca
G. Schoenau
Department of Mechanical Engineering,
University of Saskatchewan
, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, Canada
D. Bitner
Department of Mechanical Engineering,
University of Saskatchewan
, 57 Campus Drive, Saskatoon, Saskatchewan, S7N 5A9, CanadaJ. Dyn. Sys., Meas., Control. Mar 2007, 129(2): 203-211 (9 pages)
Published Online: March 3, 2004
Article history
Received:
July 25, 2003
Revised:
March 3, 2004
Citation
Wu, D., Burton, R., Schoenau, G., and Bitner, D. (March 3, 2004). "Analysis of a Pressure-Compensated Flow Control Valve." ASME. J. Dyn. Sys., Meas., Control. March 2007; 129(2): 203–211. https://doi.org/10.1115/1.1870037
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