Good Linearity Smart Digital Valve Positioner, Single-Acting, Hart Protocol for Natural Gas Pipeline

Good Linearity Smart Digital Valve Positioner, Single-Acting, Hart Protocol for Natural Gas Pipeline. HART protocol, 4-20mA analog + digital communication, compatible with ValVue software for remote configuration and valve diagnosis. Single-acting fail-safe design, spring return when air supply lost, process safety guaranteed. Built-in valve diagnostic functions to monitor friction, stroke deviation and valve health, predictive maintenance. Universal mounting for both linear and rotary pneumatic actuators, easy retrofit for old analog positioners.