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The Jordan, Knauff & Company (JKC) Valve Stock Index was down 12.5 percent for 2011, well below the broader S&P 500 Index, down only 1.1 percent. The JKC Pump Stock Index was also down 19.2 percent.
A valve positioner positions the valve in response to input signals from the process control system (or programmable logic controller).
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A valve positioner positions the valve in response to input signals from the process control system (or programmable logic controller). Most systems currently use either analog 4-20 mA or digital bus-based communications to digital valve controllers, which are highly advanced digital positioners with significant capabilities beyond just positioning the valve.
The Jordan, Knauff & Company (JKC) Valve Stock Index was down 12.5 percent for 2011, well below the broader S&P 500 Index, down only 1.1 percent. The JKC Pump Stock Index was also down 19.2 percent. Both indices kept pace with the S&P 500 during the beginning of the year and then fell behind during the last five months of 2011.
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