VPIF is a digital-monitoring module added to the company's Sealed Motor Valve (SMV) line. It is standard on Models HMMV, HMMR, HMXV, HMMVC, HMMRC and HMXVC shipped after July 1 and offered as a retrofit for earlier systems. It monitors the valve position during normal operation and is used to recalibrate the valve after service work is performed. The large LED display allows for viewing of the valve position (in percent) during normal operation. The indicator contains an internal independent 4 mA and 20 mA current source that is switch selectable for recalibration at the valve 0 percent 4mA (closed) position and 100 percent 20mA (full open) position.
Valve Position Indicator
September 1, 2006