17 June 2010
Metso has launched the HART version of its Neles ValvGuard VG9000 safety valve controller. The Neles ValvGuard VG9000 is a “new generation” safety-valve controller and automatic partial-stroke testing (PST) device for both emergency shutdown (ESD) and emergency venting valves (ESV). It combines new features and capabilities with all the benefits of the first-generation Neles ValvGuard VG800 taking automatic partial-stroke testing to a completely new level. TÜV Rheinland has certified VG9000 as compliant with IEC61508, up to SIL3. Neles ValvGuard VG9000’s extensive safety-valve-testing capabilities include partial-stroke testing, internal pneumatics testing and emergency trip testing. Safety-valve condition can be constantly monitored using the diagnostics data gained from the tests the controller performs. In addition, the VG9000 is able to collect valve diagnostics during trip situations. The VG9000, now available in both HART and FOUNDATION Fieldbus versions, can be used with both single- and double-acting actuators. The new HART version supports also both safety AO’s and DO’s.