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Valve Positioner provides simple one push button control

10 April 2007

The introduction of a new electro pneumatic control valve positioner with Profibus-PA communication is the latest addition to the range of control products offered by Samson Controls. The Series 3730 joins the established line of Samson positioners all of which are based upon a common model platform. For example, the housing, travel pick-off system, pneumatic components as well as the fast PD controller are designed along the same lines in all positioners. As a consequence of this design philosophy the positioners benefit from the same high quality air output capacity. The only key differences occur in the electronic equipment and the features associated with it, such as ease-of-operation, functionality and diagnostic capabilities. Thanks to their anolog control, the positioners not only display an unsurpassed positioning response, they also allow the microprocessor to concentrate on other tasks. This hybrid technology sets a milestone in positioner development, for example Type 3730-2 and all higher versions come with the fully integrated Expert valve diagnostics that supply the required information for predictive maintenance, without the need for additional software. Alarms are indicated via the fault indication output and displayed as detailed error codes, either on the positioners large, easy-to-read display or using the serial interface and the Trovis-View software. The new Type 3730-4 with Profibus-PA communication ties-in with the related models, such as Type 3730-3 with Hart communication, the Type 3730-5 Foundation Fieldbus Positioner with PID controller and LAS capability as well as the Type 3730-2 without communication capabilities. All these models share the integrated microprocessor that enables simple, automatic start-up at the push of a button, as well as setting additional parameters, such as; split-range operation, tight-closing function, or selecting a saved characteristic. The Series Type 3730 family of postioners work continuously to keep your process running smoothly, yet only consume a small amount of power, while its range of functions is completed by limit switches, position transmitters and solenoid valves.

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