The devices have been enhanced to include 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 designed for easy servicing as it can be disassembled and assembled using standard tools. 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. 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.