Product category:
Valve positioners and actuators
News Release from: Samson Controls | Subject: Series 3731
Edited by the Processingtalk Editorial
Team on 19 July 2007
EEx valve positioners for optimum safety
The Series 3731 explosion-proof valve positioners are now available from Samson Controls, featuring outstanding accuracy, ease of operation and on-site configuration
These positioners are housed in a very rugged enclosure which, even if an explosive atmosphere forms inside the enclosure and ignites for whatever reason, the enclosure will withstand the explosion and will also prevent the passage of flames outside the enclosure These intrinsically safe positioners also benefit from low power consumption and can be conveniently configured on-site, or by using HART communication
This article was originally published on Processingtalk on 24 Jul 2008 at 8.00am (UK)
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A single rotary pushbutton is all that is required for start-up; turn to select parameters and push to activate them.
This convenient method of operation is still possible in hazardous areas because the shaft design of the rotary pushbutton through the housing is explosion-proof.
Also, the design of the enclosure with its separate terminal compartment, allows direct cable entry or connection without spark barriers for cable conduit systems.
An easy-to-read liquid crystal display ensures that relevant data is visible at a glance and regardless of the valve mounting position, data is never displayed upside down because the display can be rotated by 180degrees at the push of a button.
The analogue control helps the positioner achieve outstanding positioning accuracy which allows the microprocessor to concentrate on other tasks.
The additional option of fully integrating 'Expert' valve diagnostics into the postioner provides all the necessary information needed for predictive maintenance.
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