Valve positioner provides boost to effluent qualityProblem: An Illinois wastewater treatment plant needed to improve the valve position on each of its three drainage doors and then send the information to its Emerson Process Delta V plant control system for monitoring. Because each drainage door had different opening characteristics, plant personnel needed to modify the analog output signal for each unit. To complicate matters, the valve actuator housings were extremely small and located in extremely challenging environments.Solution: The plant purchased field-programmable Kinax 2W2 Angular Position Transmitters from Absolute Process Instruments. Each transmitter is 1.95 inches in diameter and 1.10 inches
