YT-3400/3450 series Smart Valve Positioner accurately controls valve stroke in response to an input signal of 4-20mA from the controller. Built-in micro-processor optimizes the positioner’s performance and provides unique functions such as Auto-Calibration, PID Control, Alarms, and HART Protocol CommunicationsMain

Features and Functions

LCD display enables users to monitor the positioner status.
Positioner operates normally during sudden changes in supply pressure and / or high vibration environment.
Low air consumption level and low voltage use (8.5 V) yield to lower plant operating costs. The YT-3400/3450 is compatible with most of controllers.
Variable orifice can be used to minimize the hunting occurrence and optimize operating conditions.
Valve system feedback is greatly improved by the accuracy and fast response of the YT- 3400/3450.
Different valve characteristics can be adjusted – Linear, Quick Open, Equal Percentage, and Custom which user can make 16 points characterizations.
Tight Shut – Close and Shut - Open can be set.
PID parameters can be adjusted in the field without any additional communicator.
A/M switch can be used to direct supply air to the actuator or to manually operate the positioner or valve.
Split range 4-12mA or 12-20mA can be set.
Operating temperature is -40 ~ 85’C.