Measurement and control of multiple pressure points is a common application. Typically, four pressure points require as many as 12 different pieces of hardware. This same goal can be accomplished with one solid-state pressure switch, which can save both time and money. A duplex pump control system, for example, requires control logic based on four pressure settings with low- and high-pre...
Measurement and control of multiple pressure points is a common application. Typically, four pressure points require as many as 12 different pieces of hardware. This same goal can be accomplished with one solid-state pressure switch, which can save both time and money.
A duplex pump control system, for example, requires control logic based on four pressure settings with low- and high-pressure alarms and activation of either the leading or lagging pump.
Traditional systems use either four individual or two duplex electromechanical pressure switches. Visual display is supplied by a pressure gauge, while a transmitter is added to provide a remote 4-20 mA signal. Each device requires an instrument valve, piping and wiring.
Presently available solid-state technology can be used to replace this complexity with a single device that improves accuracy, extends life, and reduces installed costs. In addition, many applications require high/low alarms or start/stop values for their process variables.
Electronic capabilities on the latest generation of solid-state pressure switches can be adapted to handle not only pressure, but also level, temperature and flow.
For more information, visit www.barksdale.com or www.contorleng.com/freeinfo .
| Author Information |
| Terry Merlihan is product manager, transducers & solid-state switches, Barksdale, Inc., a subsidiary of Crane Co. (Los Angeles,Calif.) |
