Needle valve SMVI series

electricmeteringfor gas

SMVI intelligent control valve for high flow regulation of gases or liquids Design Features Improved high-precision two-way metering valves in aluminum or 316 SS for gas/liquid applications Four different control modes and multiple analog interfaces are supported to accommodate the variety of customer applications Standard digital RS-485 interface implemented using galvanically isolated RS-485 transceiver with high common-mode transient immunity allows direct digital communication with PLC or PC and provides access to all configuration and process variable parameters ASCII commands set, free Communication and Configuration software, and LabVIEW Driver Eliminates problems associated with solenoid designs, such as coil heating and electromagnetic hysteresis Description A line of improved electronic two-way metering needle valves is presented. A high-precision linear stepping motor actuator drives the valve spindle. The standard resolution of the stepping motor actuator-driven needles is 0.000125"/step. In micro-stepping mode, the resolution is 0.0000078125”/step. The valve can be controlled using one of the four modes: Analog Interface (0-5Vdc, 1-5 Vdc, 4-20mA, 0-10Vdc* options are supported). The valve opening is linearly proportional to the control analog signal in this mode. Digital RS-485 Interface (via optically isolated transceiver using proprietary ASCII commands set). In this mode, the user can control the valve by sending the command with the desired valve opening position expressed in % of valve full opening (0.00 to 100.00% with 0.01% resolution).