Smart actuator optimises control valve performance
Badger Meter has launched its next generation Smart Electric Valve Actuator (SEVA).
Available through Pump Engineering, the actuator incorporates military grade components to withstand extreme conditions, while the microprocessor controlled linear stepper motor is said to provide exceptional positional accuracy to ensure reliability, accuracy and repeatability.
Two models are available with 100ft-lb (135Nm) and 200ft-lb (270Nm) thrust options suitable for 1/4in – 2in Badger Research Control valves. The actuators utilise the Industrial Ethernet Protocol (EtherNet/IP) and are certified by the ODVA. SEVA actuators feature a dual-port Industrial Ethernet card and can be set-up via the built-in firmware or via a USB port. For applications which require a higher level of information for their control systems, the actuators allow for both linear and Device Level Ring (DLR) network topologies.
The actuators are designed for extreme conditions and provide accuracy of (±1% of full scale) with five available positions when there is a loss of power; continue operation, fully closed, fully open, hold position, or target value. They also feature four positions when there is a loss of signal; fully closed, fully open, hold position, or target value. Both the full closed and full open positions are defined during set-up.
In addition, for precise applications, the SEVA offers a loop-powered feedback signal which actively communicates stroke position to the control system; it also features a manual override capability to help operators when there is a loss of power.
The actuator assembly provides the option to include two user-adjustable limit switch outputs, while an external signal is provided once the set points of the limit switch are met. Furthermore, it can split the incoming 4-20 mA signal and use either the lower or higher range of the signal for full stroke operation.
The range is available with FM or ATEX EExd IIB T6 approvals for hazardous areas and are IP66 rated.
Source: Control Engineering Europe - All Articles