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Posted: Monday 24th March 2014

Challenging fluids handling applications, such as those in the oil, gas and petrochemical industries where systems are required to operate under severe operating conditions, are ideal situations for SAMSON CONTROLS’ Type 3291 valve, Type 3730-6 valve positioners.

These well established, field-proven devices have recently been enhanced to include the benefits of the proven V-port plug and clamped-in seat features along with smooth interior valve surfaces which help to prevent the build-up of deposits and therefore reduce the potential for the valves to be affected by clogging.

This modular valve and positioner package is extremely versatile and is designed for easy servicing as it can be disassembled and assembled using standard tools. Also, accessories such as flow dividers, perforated plugs, insulating sections, bellows seals, positioners, limit switches and solenoid valves can all be easily mounted.

The type 3730-6 positioner with HART® communication is a further development of the successful Series 3730 positioners. The standard version is supplied with the proven EXPERTplus valve diagnostics that allow the entire operating cycle of control valves used in throttling or on/off service to be monitored.

Another feature is partial stroke testing (PST) that provides information on whether shut-off valves function properly on demand and can be started by hand or automatically.

Diagnostic data can be read much faster thanks to the improved HART communication and emergency shutdown is guaranteed in accordance with IEC 61508 up to SIL 3 which eliminates the need for an additional solenoid valve.

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August 2021

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